JP2003037850A - Image processing method and system - Google Patents

Abstract

(57) [Summary] In a computer system for performing color conversion, a load on a CPU of a computer connected to an output device (a monitor or a printer) is reduced. Further, the user does not have to change the setting of the output device every time the color space of the supplied image data changes. SOLUTION: Original image data in a first color space is received from a provider 215 via a communication channel 110,
Tag data representing the parameters of the first color space is received from the provider along with the image data via the communication channel 112, and the output device 206 automatically converts the original image data into the second color space according to the tag data. And then to its visually perceptible analog (corresponding display, printed matter, etc.).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing method and system, and more particularly to outputting image data at an output device, and more particularly to automatically adjusting color characteristics of the output device.
More specifically, the present invention relates to making the output device share the calculation load for color characteristic matching.

[0002]

2. Description of the Related Art Digital image data can be generated in association with various color spaces. For this color space,
For example, sRGB (International Electrotechnical C
ommission (IEC: International Electrotechnical Commission) IEC 61
Standardized by 966-2-1), NTSC system, PAL
System, SECAM system, etc. However, in many cases, the color space of the source of the image data is different from the color space of the output device (monitor, printer, projector, etc.) that converts the image data to its visually perceptible analog. In other words, if the image data source operates in the first color space and the output device operates in the second color space,
It is usually desirable to convert the image data from the first color space to the second color space before outputting it on the output device.

Typically, in the background art (as shown in FIG. 1), the central processing unit (CPU) of a computing device (such as a personal computer) converts the color space (CS) rather than the output device. It is carried out. FIG. 1 is a block diagram of a personal computer system according to the background art.

In FIG. 1, a personal computer (PC) 100 includes a CPU 102 and an output device 10 connected to the CPU 102 by a signal path 114.
6 and 6 are included. Figure 1 also shows CP
Also shown is a source 108 of image data connected to U102 via signal paths 110 and 112. CPU 102
Has a color space (CS) conversion module 104 having a function of converting the image data from the first color space to the second color space. CS conversion module 104 is shown as being at the termination point of signal paths 100 and 112. The output device 106 is a monitor 106A, which is a component of a PC, or the printer 1 outside the PC.
It is shown in the form of 06B. Monitor 1
Both 06A and printer 106B are considered to be outside CPU 102.

In operation, the image data source 108
Is the image data of the first color space (CS1) and the tag data representing the parameters of the first color space via the signal paths 110 and 112, respectively.
04 to the CS conversion module 104. Then, the CS conversion module 104 automatically converts the image data from the first color space to the second color space (CS2) according to the tag data for the first color space. Then, the CS conversion module 104 outputs the image data of the second color space to the output device 106 via the signal path 114.

Separate signal paths 110 and 112 are shown for the image data and associated tag data to emphasize that the tag data is transmitted to the CPU 102, whereas the CPU 102 Is CS
Only two image data are shown transmitted over signal path 114. However, it is not necessary to transmit the image data and the tag data via two separate signal paths.

The CS conversion module 104 is usually the CPU 1
It is realized as software executed in 02. Therefore, the software conversion speed is limited to the speed of the CPU 102 system clock. Therefore, in general, the CPU uses an output device (here, the monitor 106) in real time.
There is a problem that moving images (for example, 100 million pixels per second) cannot be converted fast enough to display moving images in A).

The PC 100 of FIG. 1 has another problem. This PC is a second output device (not shown), eg a liquid crystal display (LC
D) Consider the case of driving a projector. The color space of the second output device is the color space of monitor 106A (CS3).
Color space conversion module 104 is
The original image data from 08 and CS3 image data and CS3
Try to convert to image data at the same time. The computational load in this case cannot be processed in real time by the CS conversion module 104, ie the CPU 102, except for the smallest of the image data sets. As a result, the monitor 106A and the second monitor cannot simultaneously display the same image in real time.

A computer monitor (model: LX) sold by Mitsubishi Electric Corporation (hereinafter referred to as "Mitsubishi Electric")
It is known in the background art to provide a non-automatic color space conversion function in an output device, as represented by A580W). Such monitors include a conversion circuit, including a storage device, for converting input image data from one of a plurality of color spaces to the monitor color space.

A viewer / user of a background art monitor sold by Mitsubishi Electric may operate a dedicated interface on the front of the monitor case to select one of a plurality of color spaces. it can. Therefore, the processing circuit in the monitor treats the input image data as if it were data generated in the selected color space. The processing circuit converts the input image data from the selected color space to the monitor color space. The converted image data is displayed. The observer / user looks at the displayed data and determines if the appearance is acceptable. By trial and error, it is possible to choose the transformation that gives the best appearance (according to the observer / user's personal preferences).

[0011]

The background art monitor sold by Mitsubishi Electric has the advantage that the quality of the displayed image can be improved. However, it has the disadvantage that the user / observer must be actively involved in the optimization process each time data from different color spaces is displayed.

Further, for example, when image data displayed in a plurality of so-called windows are associated with different color spaces, it is appropriate for a window having parameters used for color space conversion. However, there is a problem that it may not be appropriate for other windows.

Furthermore, for a user / observer who is familiar with the color reproduction of a home-use television apparatus, the color reproduction desired for a still image is different from the color reproduction desired for a moving image, and the still image and the moving image are different. There is the problem that every time you switch between and you must be actively involved in the optimization.

[0014]

SUMMARY OF THE INVENTION The present invention transforms original image data generated in association with a first color space into image data in a second color space into its visually perceptible analog. A method of outputting with an output device, comprising receiving original image data generated according to a first color space from a provider via a communication channel, and tag data representing parameters of the first color space, Receiving with the image data from the provider via a communication channel, the output device automatically converting the original image data into the second color space according to the tag data, and converting the original image data into the second color space. And an output device converting the converted image data into a visually perceptible analog thereof. It is.

The provider comprises a computing device, the communication channel comprises a direct connection between the computing device and the output device (ie they are directly connected), or the provider comprises a storage device, The communication channel may include a direct connection between the storage device and the output device, or the provider may include a server and the communication channel may include a network to which the output device is connected. .

The output device may include the components of a personal computer connected to the network.

In this case, the network connection may be wireless.

The provider may receive the original image data from a source.

In this case, the source may include a scanner, a digital still camera, a video camera or a signal generator.

The output device may include a monitor, a projector or a printer.

The tag data includes a code for identifying a color space, a primary color coordinate value, a white point, brightness, a gradation characteristic, a color reproduction characteristic, a still image / moving image identification code, or a parameter for image processing. It may include one.

As the above-mentioned still image / moving image identification code, for example, a code indicating that the image is supplied from a digital still camera (indicating that it is a still image), or an image is supplied from a scanner. A code indicating that the image is a still image, a code indicating that the image is supplied from a video camera (indicating that it is a moving image), an image recorded on a DVD It is possible to use a code (indicating that it is a moving image) or the like indicating that it is supplied from a DVD drive device having a function of reproducing the.

In this case, the tag data is a combination of the primary color coordinate value and the gradation characteristic, or the gradation characteristic is a gamma value for the first color space and a table for gradation conversion. Value, or the color reproduction characteristic may include one of RGB signal levels of a specific color, or a combination of coordinate values of hue, saturation and lightness.

Further, in this case, the coordinate values of the hue, saturation and lightness may be represented by absolute values or relative values.

Monitoring the presence of tag data representing a parameter of one color space with the image data via the communication channel, and if no tag data is received on the communication channel, Based on the estimation that the first color space is the default color space and the estimation that the first color space is the default color space, the output device outputs the original image to the second color space. May be further included to generate the converted image data.

The present invention also outputs the original image data generated in association with the first color space by an output device which converts the image data in the second color space into its visually perceptible analog. A method of receiving original image data generated according to a first color space from a provider via a communication channel, and obtaining parameters of one color space together with the image data via the communication channel. Monitoring the presence of the represented tag data, estimating that the first color space is the default color space when no tag data is received on the communication channel, and the first color space Is based on the assumption that is the default color space, the output device converts the original image to the second color space to generate converted image data. The output device is intended to provide an image processing method including the converting the converted image data to the visually perceptible analog.

The provider comprises a computing device, the communication channel comprises a direct connection between the computing device and the output device, or the provider comprises a storage device,
The communication channel may include a direct connection between the storage device and the output device, or the provider may include a server and the communication channel may include a network to which the output device is connected. .

The output device may include components of a personal computing device connected to the network.

In this case, the network connection may be wireless.

The provider may receive the original image data from a source.

In this case, the source may include a scanner, a digital still camera, a video camera or a signal generator.

The output device may include a monitor, a projector or a printer.

The default color space may be sRGB.

The output device further includes retrieving or obtaining data representing the parameters of the default color space, wherein the parameters are codes for specifying the color space, primary color coordinate values, white point, brightness, and gradation characteristics. , Color reproduction characteristics, still image / moving image identification codes, or parameters for image processing.

As the above-mentioned still image / moving image identification code, for example, a code indicating that it is an image from a digital still camera (indicating that it is a still image) and a code indicating that it is an image from a scanner (still image) (Indicating that it is an image), a code indicating that it is an image from a video camera (indicating that it is a moving image), a code indicating that it is an image from a DVD drive device (indicating that it is a moving image) Can be used.

In this case, the parameter includes a combination of the primary color coordinate value and the gradation characteristic, or the gradation characteristic is a gamma value for the first color space and a table value for gradation conversion. Or the color reproduction characteristic may include one of RGB signal levels for a specific color, or a combination of coordinate values of hue, saturation and lightness.

Further, in this case, the coordinate values of the hue, saturation and lightness may be represented by absolute values or relative values.

The output device is a display device capable of displaying an image obtained by converting the original image data in a display area forming a part of a display screen.
The display device generates a color space conversion parameter for the display area based on area data indicating the display area and tag data related to the original image data, and generates a color space conversion parameter for the generated color space conversion parameter. Based on this, the original image data may be converted into image data of the second color space that represents the image displayed in the display area.

In this case, the display device obtains by converting the second original image data generated according to the third color space (CS4) into the second display area which constitutes another part of the display screen. Displayed images, and further,
Receiving the second original image data from the provider via a communication channel, and receiving the third color space (C
Receiving second tag data representing the parameter of S4) together with the second original image data from the provider via a communication channel;
Based on the second area data indicating the second display area, further on the basis of the second tag data or on the assumption that the third color space (CS4) is the default color space. , Generating a color space conversion parameter for the second display area, and representing the second original image data based on the generated color space conversion parameter, the image displayed in the second display area. Conversion to image data in the second color space may be included.

Further, in this case, the display device can display the third original image data on a portion of the display screen other than the display area, and the display device displays the area / area. A color space conversion parameter for a portion of the display screen other than the display area is generated based on the data, and the third original image data is generated based on the generated color space conversion parameter other than the display area. It may be converted into image data of the second color space that represents an image displayed in the portion.

The present invention further converts the original image data generated in association with the first color space into image data of the second color space, and outputs the image data in a visually recognizable analog form. An image processing system having an output device (206, 306) for
5, 300, 406, 502, 600), a communication channel (208, 210), and an output device (206, 306) for converting image data in the second color space into its visually perceptible analog. And the output device is capable of receiving the original image data generated according to a first color space from the provider via the communication channel, the output device including the image data and the first image data.
Tag data representing parameters of the color space of the first color space may be received from the provider via the communication channel, and the output device may output the original image data associated with the first color space according to the tag data. Convert
The present invention provides an image processing system capable of generating converted image data, and the output device capable of converting the converted image data into its visually recognizable analog.

The provider includes a computing device, and the communication channel is the computing device and the output device (206).
Or the provider includes a storage device (602), the communication channel includes a direct connection between the storage device and the output device, or the provider includes a server (304). The communication channel may include a network to which the output device is connected.

The output device (206) may include the components of the personal computer (200) connected to the network.

In this case, the network connection may be wireless (408).

The provider may receive the original image data from a supply source (216).

In this case, the source (216) may comprise a scanner, digital still camera, video camera or signal generator.

The output device (206) may include a monitor, a projector or a printer.

The output device (206) is the first output device (206), and the converted image data is the first output device (206).
Converted image data (CS2) of the third color space (CS3).
At least a second output device (206 ′) for converting the image data into a visually recognizable analog, wherein the provider converts the original image data (CS1) into the second output device ( 206 ′), the provider can transmit the tag data together with the original image data to the second output device (206 ′), and the second output device (206 ′). )But,
The original image data (CS1) related to the first color space can be converted according to the tag data to generate second converted image data (CS3), and the first output device can be used. At about the same time that (206) converts the first converted image data (CS2) into its visually recognizable analog, the second output device (20).
6 ') is the second converted image data (CS3)
May be converted into a visually recognizable analog.

In this case, the first output device is the default monitor (206A) for the image processing system.
And the second output device includes an auxiliary monitor (206
A ') may be included.

Further, in this case, the auxiliary monitor (206
A ′) may include a projector device.

The output device (206) can monitor, via the communication channel, the presence of tag data representing color space parameters along with the image data, the output device on the communication channel. With tags
If no data is received, it can be estimated that the first color space is the default color space.
Based on the assumption that the color space of is the default color space, the output device can transform the original image data associated with the first color space to produce transformed image data. It may be one.

The present invention further converts the original image data generated in association with the first color space into image data in the second color space into a visually perceptible analog of the image data. An image processing system having an output device for outputting, comprising: image data providers (215, 300, 4
06,502,600) and the communication channel (208,
210) and an output device (206) for converting the image data of the second color space into its visually perceptible analog, said output device (206) having the first color space (CS).
The original image data generated according to 1) can be received from the provider via the communication channel, and the output device (206) can transmit the color space of the color space together with the image data via the communication channel. The presence of tag data representing parameters can be monitored,
The output device (206) may deduce that the first color space is a default color space if no tag data is received on the communication channel, and the first color space is the above. The output device may transform the original image data (CS1) associated with the first color space to generate transformed image data (CS2) based on the assumption that it is a default color space. Then, the output device (206) outputs the converted image data (CS
It is intended to provide an image processing system capable of converting 2) into its visually recognizable analog.

The provider includes a computing device, the communication channel includes a direct connection between the computing device and the output device, or the provider includes a storage device (60).
2), the communication channel includes a direct connection between the storage device and the output device (206), or the provider includes a server (304) and the communication channel is connected to the output device. It may include a network (302) that is open.

A personal computer (200, 400) in which the output device (206) is connected to the network.
May be included.

In this case, the network connection (40
8) may be wireless.

The provider may receive the original image data from a supply source (216).

In this case, the source (216) may comprise a scanner, digital still camera, video camera or signal generator.

The output device (206) may include a monitor, a projector or a printer.

The output device (206) is the first output device (206), the converted image data is the first converted image data (CS2), and the image processing system is the third. At least a second output device (206 ') for converting the image data (CS3) in the color space into a visually recognizable analog of the image data, wherein the provider converts the original image data into the second image data. Output device (2
06 '), the provider can transmit the tag data together with the image data to the second output device (206'), and the second output device (206 ').
Output device (206 ') of the first color space can convert the original image data associated with the first color space to generate second converted image data (CS3). The first output device (206) is the first
At about the same time as converting the converted image data (CS2) into its visually perceptible analog, the second output device (206 ′) causes the second converted image data (CS3) to be converted. May be converted into a visually recognizable analog.

In this case, the first output device (206)
May include a default monitor for the image processing system, and the second output device (206 ') may include an auxiliary monitor.

Further, in this case, the auxiliary monitor may include a projector device.

The default color space may be sRGB.

The output device is a display device capable of displaying an image obtained by converting the original image data in a display area (720) forming a part of the display screen. A parameter generation unit (702) for generating a color space conversion parameter for the display area based on area data indicating the display area and tag data related to the original image data;
A processing unit (5) that converts the original image data into image data of the second color space that represents an image displayed in the display area based on the generated color space conversion parameter.
10) and may be included.

In this case, the display device obtains by converting the second original image data generated according to the fourth color space (CS4) into the second display area forming another part of the display screen. The provider (215) supplies the second original image data, and the display device provides the second original image data through the communication channel. The display device receives second tag data representing the parameters of the fourth color space (CS4) together with the second original image data from the provider via the communication channel. The parameter generation unit (702) may further include the second tag data based on the second area data indicating the second display area. Or based on the assumption that the fourth color space is the default color space, the color space conversion parameters for the second display area are generated and the processing unit (510) is generated. The second original image data based on the color space conversion parameter,
The second representing the image displayed in the second display area
It may be one that can be converted into image data in the color space.

Further, in this case, the display device can display the third original image data on a portion of the display screen other than the display area, and the parameter generating unit (702) is used. , Generating color space conversion parameters for the portion of the display screen other than the display area based on the area data, and the processing unit (510) based on the generated color space conversion parameters. The third original image data may be converted into image data of the second color space that represents an image displayed in a portion other than the display area.

[0066]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be more fully understood from the following detailed description and the accompanying drawings, which are intended to be illustrative and not limiting of the invention. Will be done. The accompanying drawings are not drawn to scale.

FIG. 2 is a block diagram showing a computer system constituting the image processing system according to the first embodiment of the present invention. In FIG. 2, a computing device such as a personal computer (PC) 200 is a CPU 20
2 and an output device 206. FIG. 2 also shows an optional image data provider 215 that includes an image data source 216 connected to the CPU 202 via a network 218 managed by a server 220. (Network 218 and server 220 are drawn with dotted lines to indicate that they are optional.)
The image data source 216 is, for example, a scanner, a digital still camera, a video camera or a signal generator (eg paint, photo, graphics, or computing device programmed with animation software).

The image data provider 215 is a CPU
It is connected to 202 via signal paths 110 and 112. The CPU 202 is connected to the CS conversion module 204 via signal paths 208 and 210.

CPU (as in the background art of FIG. 1)
Instead of 202, the output device 206 includes a color space (CS) conversion module 204 that has the function of converting image data from a first color space to a second color space. CS conversion module 204 corresponds to CS conversion module 506 of FIG. 5 (shown in more detail). CS conversion module 5
06 will be described in more detail later.

The output device 206, such as a monitor 206A that can be a component of a PC, or a printer 206B that can be external to the PC, can output image data in a visually recognizable analog form (corresponding display, printed matter, etc.). )) Is included.
The CS conversion module 204 is connected to the converters 206A and / or 206B via signal path 214.

Each of the monitor 206A and the printer 206B, and the CS conversion module 204 includes a CPU 202.
It is thought to be outside. Monitor 206A can be a cathode ray tube (CRT), liquid crystal display (LCD) device, plasma display panel (PDP), LCD projector, or the like. The printer 206B can be a laser printer, an ink jet printer, a dot matrix printer, a thermal printer, a plotter, or the like.

Separate signal paths 208 and 210 are shown for the image data and associated tag data. This is because the tag data is the CS conversion module 204.
This is to emphasize that it will be transmitted to. Signal path 214, on the other hand, conveys only CS2 image data to converters 206A and / or 206B. The same applies to other figures. However, it is not necessary to transmit the image data and the tag data via two separate signal paths. Rather, the number of signal paths depends on the type of application in which the invention is used.

FIG. 3 is a block diagram showing a second embodiment of the computer system according to the present invention. The differences between FIG. 3 and FIG. 2 will be mainly described below. Figure 3
In the image data provider 300, the server 3
The network 302 managed by 04. A network compatible output device 306 having a conversion module 204 is connected to the network 302 via signal paths 208 and 210.

FIG. 4 is a block diagram showing a third embodiment of the computer system according to the present invention. Hereinafter, differences between FIG. 4 and FIG. 2 will be mainly described. Figure 4
At the image data provider 406,
It may be a wireless network 408 managed by 10. The computing device 400 (eg, personal digital assistant (PDA)) includes an antenna 401, a wireless interface 402, and a CPU 404.

In FIG. 4, the antenna 401 of the computing device 400 is connected to the image data provider 406 via wireless signal paths 414 and 416. The wireless interface 402 is connected to the antenna 401 via signal paths 418 and 420. The wireless interface 402 is connected to the CPU 404 via signal paths 422 and 424.
It is connected to the. CPU 404 uses signal paths 208 and 2
It is connected to the CS conversion unit 204 via 10. The CS conversion unit uses the signal path 214 to convert the converter 2
06A and / or 206B.

FIG. 5 shows in detail the CS conversion module 506 used in the first to third embodiments and the fourth and fifth embodiments described later. CS conversion module 5
Reference numeral 06 corresponds to the CS conversion module 204. In FIG. 5, the image data provider 502 has a CS conversion module 506 via a communication channel 504.
It is connected to the. The communication channel 504 includes signal paths 208 and 210.

The CS conversion module 506 includes a unit 510 for processing image data. The processed image data is output to output device 518 (corresponding to output device examples 206 and 206 above). The CS conversion module also includes a unit 508 for setting the parameters of the processing unit 510 and an optional storage device 521 (shown in dotted lines), eg a ROM, connected to said unit 508. The processing unit 510 includes a unit 512 for processing an input image, a unit 514 for converting a color of input image data, and a unit 516 for processing an output image. The unit 512 includes a gradation conversion module 520 for manipulating or converting the gradation of the input image. Unit 516
Includes a gradation conversion module 522 for manipulating or converting the gradation of the output image.

Units 508, 512, 514 and 51
6 is preferably hardware such as a programmable logic array (PLA) or an application specific IC (ASIC). Units 508, 512, 514 and 516 are also the subject of the following co-pending applications:
Each of which is incorporated herein by reference. That is, the unit 508 is the target of the patent application No. 291896, the patent application No. 291897, the patent application No. 349716 and the patent application No. 349717, and the unit 512 is Patent application Heisei 11
291892 and Patent Application 1999 291894
Unit 514 is the original patent application of the basic US application of the present application, that is, United States patent application 09 / 457,703 and patent application 1999 18th.
217 and patent application 1999 No. 326005, and unit 516 is patent application 1999 No. 2
It is the target of No. 91893 and Japanese Patent Application No. 291895 of 1999.

The tag data representing the parameters of the color space are the units 508, 510, 512, 514 and 51.
It can take various forms depending on the details of 6. Below, tags
An example of data will be described. Tag data is, for example, sR
Proprietary standar used by manufacturers of GB, NTSC, PAL, SECAM, and image generators
d) to identify the type of color space (eg 3
It may be a code (in bits). Tag data is the coordinate value of the primary color, for example R: (x, y) = (0.640,0.330), G: (x,
y) = (0.300,0.600), B: (x, y) = (0.150,0.060); or
W: (x, y) = (0.3127,0.3290) (where x, y are CIE (Commis
chromaticity coordinate values according to sion Internationale de l'Eclairage).

The tag data has gradation characteristics, for example, gamma =
It may be a gamma value such as 1.8 or 2.2 or 2.6. The tag data may be a table composed of values for gradation conversion. This describes, for example, the relationship between the input signal level and the output signal level, and is as follows, for example.

[0081]

[Table 1]

The tag data may be a combination of primary color coordinate values and gradation characteristics.

The tag data may be color reproduction characteristics related to human perception, eg RGB signal values for a particular color, eg red, R = 1.0, G = 0.1, B = 0.0, or the hue of a particular color ( hue) (similar to color phase), chroma (chroma) (saturation: similar to saturation), and value (value) (brightness: similar to brightness), for example, in the case of an absolute value, red is Hue. = 5, Chroma = 4, Value = 14, Red is delta_H = 0.1, delta_C = -0.01, delta_V =
It may be 0.0. The tag data may also be parameters for the processing unit 510, in particular the gradation conversion unit 520, the color conversion unit 514 and the gradation conversion unit 522.

The tag data may also be a moving image / still image identification code. As the moving image / still image identification code, a code corresponding to an image source such as a digital still camera, a scanner, a video camera, TV broadcasting, or a DVD drive can be used. In that case, the digital still camera and scanner are recognized as providing still images, and the video camera, TV broadcast, and DVD drive are recognized as providing moving images. Needless to say, the source of the image is not limited to the above, as long as it can identify whether the resulting image is a moving image or a still image. In general, the color reproduction of a home-use television is often bright with a white point shifted to a high color temperature side as compared with a personal computer system. On the other hand, in addition to the switching based on the above-mentioned still image / moving image identification code, it is also possible to automatically adjust by the tag data indicating the white point and the brightness.

Of the various tag data described above,
Which one is adopted can be selected depending on the size of the memory for storing the tag data or the purpose of the system. Also, a plurality of tag data may be used together.

FIG. 6 is a block diagram showing a fourth embodiment of the computer system according to the present invention. The differences between FIG. 6 and FIG. 2 will be mainly described below. Figure 6
In the above, the image data provider 600 is a storage device 602, for example, PCMCIA (Personal Computer Mini).
ature Communicaitons Interface Adapter) memory card, disk drive device, or other storage device. Image data provider is signal line 11
It is connected to the CPU 202 via 0 and 112.
CPU 202 sends CS via signal paths 208 and 210.
Connected to the conversion module 204, the CS conversion module via the signal path 214, the converter 206A and / or 20.
6B is connected.

The operation of the above-described first to fourth embodiments will be described below.

In FIG. 2, the image data provider 2
Reference numeral 15 denotes the image data of the first color space (CS1) and the tag data representing the parameters of the first color space via the signal paths 110 and 112, respectively.
Supply to U202. The CPU 202 sends the CS1 image data and the tag data (as opposed to the background art of FIG. 1).
Without conversion, it is transmitted to the CS conversion module 204 in the output device 206 via the signal paths 208 and 210, respectively. Then, the CS conversion module 204 uses the first
CS1 image data is automatically converted from the first color space to the second color space (CS2), ie, the color space for the converters 206A and / or 206B according to the tag data for the color spaces of . The CS conversion module 204 has a second
Image data in the color space of the converter 2 via the signal path 214
Output to 06A and / or 206B.

If the PC 200 has both a default monitor (initialization monitor) 206A and a printer 206B, the monitor 206A and printer 206B may each include its CS conversion units 204A and 204B (not shown for simplicity). it can. Similarly, if another output device 206i (not shown) is provided, this device may also include its own CS conversion module 204i.

Similarly, in FIG. 5, the CS conversion module 506 transfers the CS1 image data from the image data provider 502 to the second color space (CS2) according to the tag data for the first color space. Convert automatically.
The CS conversion module 506 outputs the image data of the second color space to the output device 518. Units 508, 51
For details of the operation of 0, 512, 514 and 516, see the application incorporated by reference above.

Another embodiment of the CS conversion module 204 comprises the optional storage device 521 in FIG. In this alternative embodiment, unit 508 (for setting parameters) monitors signal path 210 for tag data. On the signal path 210, a tag tag is transmitted within a predetermined time in relation to the transmission of image data.
If no data is received, unit 508 estimates that the color space of the image data corresponds to the default color space. The storage device 521 stores parameters representing the default color space. Unit 508 supplies this default parameter to processing unit 510.
The default color space may be sRGB, for example.

As a further alternative, instead of transmitting the tag data (representing the color space parameters) to unit 508 via signal path 210, the color space parameters themselves are sent from image data provider 502 to unit 5;
08 can also be transmitted. However, this would result in a wider communication bandwidth.
Is required.

In FIG. 3, CS1 image data and associated tag data are transmitted from the server 304 via the network 302 and by the image provider 300 via signal paths 208 and 210, respectively. The output device 306 can interface with the network 302. The operations of the CS conversion module 204 and the like are substantially the same as above.

In FIG. 4, the data provider 406
Under the control of the server 410, the CS1 image data and its associated tag data are transmitted via the wireless network 408 to the wireless signal paths 414 and 4 respectively.
It transmits to the antenna 401 via 16. Computing device 4
00 wireless interface 402 sends CS1 image data and associated tag data to signal paths 418 and 420.
To receive via. The wireless interface 402 is C
The S1 image data and associated tag data are transmitted to CPU 404 via signal paths 422 and 424.
The CPU 404 transmits the CS1 image data and its associated tag data to the CS conversion module 204 in the output device 206 via signal paths 208 and 210, respectively. The operations of the CS conversion module 204 and the like are substantially the same as above.

In FIG. 6, the image data provider 6
00, for example, the memory device 602, has a first color space (CS
The image data of 1) and the tag data representing the parameters of the first color space are transmitted to the CPU 202 of the PC 200 via the signal paths 110 and 112, respectively. CPU2
Operations such as 02 are almost the same as those in FIG.

FIG. 7 is a block diagram showing the fifth embodiment of the computer system according to the present invention. The differences between FIG. 7 and FIG. 2 will be mainly described below. Figure 7
At, two output devices 206 and 206 'are provided. The first output device 206 comprises a CS conversion module 204 and a converter, eg a default monitor 206A. The second output device 206 'has a CS conversion module 204' and a converter, for example an auxiliary monitor 206A 'composed of a projector device.

The CPU 202 similar to that shown in FIG.
The output device 206 ′ is connected to the CS conversion module 204 in the output device 206 via 8 and 210.
Connected to the CS conversion module 204 ′ within the CS conversion module 204 via signal path 214 to the converter 206.
CS conversion module 204 'is connected to signal line 2
It is connected to the converter 206A 'via 14'.

From the image data provider 215, the first
CPU 2 receives the image data of the color space (CS1) and the tag data representing the parameters of the first color space.
02 designates CS1 image data and tag data as C in the output device 206 via signal paths 208 and 210, respectively.
While transmitting to the S conversion module 204, it transmits to the CS conversion module 204 'in the output device 206'.
The CS conversion module 204 automatically converts the CS1 image data from the first color space to the second color space (CS2), that is, the color space for the converter 206A according to the tag data for the first color space. To convert The CS conversion module 204 outputs the image data of the second color space (CS2) to the converter 206A via the signal path 214. At approximately the same time, the CS conversion module 204 'converts the CS1 image data into the CS1 image data according to the tag data for the first color space.
Automatically convert from the first color space to the third color space (CS3), the color space for converter 206A '. The CS conversion module 204 ′ outputs the image data of the third color space (CS3) to the converter 206A ′ via the signal path 214 ′.

In the fifth embodiment, the converter of the second output device is a monitor, but it may be another converter such as a printer. Further, although the number of output devices (206, 206 ′) is two in the fifth embodiment, it is also possible to use three or more. Further, the fifth embodiment is a modification of the second embodiment, but the same modification is applied to the second embodiment.
Through can be added to the fourth embodiment.

The sixth to ninth embodiments described below are the same as the first to fourth embodiments, but are different in that a sorting unit 702 is provided.

FIG. 8 is a block diagram showing a computer system constituting an image processing system according to the sixth embodiment of the present invention. The computer system of this embodiment is generally the same as the computer system of the first embodiment shown in FIG. However, they differ in the following points. First, the output device 206 includes a sorting unit 702. Further, the printer 206B is not provided. Further, a CS conversion module 704 is provided instead of the CS conversion module 204 of FIG. The CS conversion module 704 is similar to the CS conversion module 204, with the differences described below.

The output device 206 of this embodiment uses the original image data (CS) supplied from the image data supply source 216.
The image obtained by converting 1) is displayed on the monitor 20.
6A is displayed in a display area 720 forming a part of the display screen, and at least a part of an image (not shown) different from the original image is displayed in a part of the display screen other than the display area 720. It is a display device that can
The area 202 can generate area data indicating the display area 720.

The display area 720 is, for example, a basically rectangular area on the display screen called a window, and the area data displays contents such as images only in such an area. This is data for specifying the area when doing. The area data is, for example, the data indicating the coordinates of one vertex and the length of the long side and the short side of the rectangle forming the window, or the data indicating the coordinates of two vertices in a diagonal relationship. Any information may be used as long as it is information that can specify the area where the image after CS conversion described below is displayed on the screen.

The CPU 202 uses the CS conversion module 704.
To the signal path 208. CPU 202
Is also connected to the sorting unit 702 by the signal paths 210 and 710.
Connected through.

The sorting unit 702 determines whether each pixel is within the display area 720 based on the area data, and based on the determination result and the tag data, the inside of the display area 720 and the display area 720. It functions as a parameter generation unit for generating a CS conversion parameter for each pixel for each of the outside. Note that when the pixels in the display area 720 are continuously processed, or when the pixels outside the display area 720 are continuously processed, the same CS conversion parameter as the previous pixel can be used. , That (the same CS as the previous pixel
Data indicating that the conversion parameter can be used) is generated and output instead of the CS conversion parameter. In addition, for the image inside the display area 720 or the image outside the display area 720, CS conversion may not be necessary because the image data is in the second color space. In this case, for the sake of convenience, in the present specification, the CS conversion is performed so that the image data before conversion and the result after conversion are the same.

The output of the sorting unit 702 is connected to the CS conversion module 704 via the signal path 212.

The CS conversion module 704 uses the C for each pixel.
CS conversion of image data is performed based on the S conversion parameter. That is, the CS conversion module 704 uses the image conversion data source 21 based on the CS conversion parameters for the inside of the display area 720 generated by the sorting unit 702.
The original image data supplied from 6 is displayed on the display area 72.
It is converted to image data of the second color space (CS2) displayed at 0. The CS conversion module 704 further, based on the color space conversion parameters for the outside of the display area 720, which are generated by the sorting unit 702, the original image data for the portion of the display screen other than the display area, The second display displayed in a part other than the display area
Image data in the color space of.

CS conversion module 704 corresponds to CS conversion module 706 of FIG. 11 (shown in more detail). The CS conversion module 706 will be described in detail later.

Separate signal paths 208, 210 for the image data and its associated tag and area data.
And 710 are shown. This is because the image data, tag data and area data are CS conversion module 7
This is for emphasizing that the data is transmitted to 04 or the sorting unit 702. However, it is not essential that the image data, tag data, and area data be transmitted via three separate signal paths. Rather, the number of signal paths depends on the form of application in which the invention is used, as described for the first to fifth embodiments.

FIG. 9 is a block diagram showing a seventh embodiment of the computer system according to the present invention. Hereinafter, differences between FIG. 9 and FIG. 8 will be mainly described. Figure 9
In the image data provider 300, the server 3
The network 302 managed by 04. Sorting unit 702 and conversion module 70
4, the network compatible output device 306 has a network 3 via signal paths 208, 210 and 710.
02 is connected.

FIG. 10 is a block diagram showing an eighth embodiment of computer system according to the present invention. Hereinafter, differences between FIG. 10 and FIG. 8 will be mainly described. In FIG. 10, the image data provider 406 may be a wireless network 408 managed by the server 410. The computing device 400 (eg, personal digital assistant (PDA)) includes an antenna 401, a wireless interface 402, and a CPU 404.

In FIG. 10, the antenna 401 of the computing device 400 is connected to the image data provider 406 via wireless signal paths 414 and 416. The wireless interface 402 is connected to the antenna 401 via signal paths 418 and 420. The wireless interface 402 is connected to the CPU 40 via signal paths 422 and 424.
4 is connected. The CPU 404 is connected to the CS conversion module 704 via the signal path 208. CP
U404 is also connected to sorting unit 702 via signal paths 210 and 702. Sorting unit 702
Of the CS conversion module 7 via the signal path 212.
04 is connected. The CS conversion module 704 is connected to the monitor 206A via the signal path 214.

FIG. 11 shows a CS used in the sixth to eighth embodiments and the ninth and tenth embodiments described later.
The conversion module 706 is shown in detail. The CS conversion module 706 corresponds to the CS conversion module 704 of FIGS. 8 to 10 and FIGS. 12 and 13 described later. In FIG. 11, the image data provider 502 is a CS conversion module 70 via a communication channel 504.
6 and the sorting unit 702. This communication channel 504 has signal paths 208, 210 and 710.
It is included. The image data provider 502 is connected to the CS conversion module 706 via signal path 208 in the communication channel 504 and to the sorting unit 702 via signal paths 210 and 710. The sorting unit 702 receives the CS signal via the signal path 712.
It is connected to the conversion module 706.

The output device 206 shown in FIG. 11 is an optional storage device 52 connected to the sorting unit 702.
1 (indicated by a dotted line), for example, ROM is included. Note that FIG.
In the example, the storage device 521 is illustrated as being provided inside the CS conversion module 506, but in the example in FIG. 11, it is provided outside the CS conversion module.

The CS conversion module 706 includes a unit 510 for processing image data. The processed image data is output to the output device 518 (corresponding to the monitor 206A).

The processing unit 510 is similar to that shown in FIG. 5, and is a unit 51 for processing an input image.
2 and a unit 514 for converting the color of the input image data
And a unit 516 for processing the output image. The unit 512 includes a gradation conversion module 520 for manipulating or converting the gradation of the input image. The unit 516 is a gradation conversion module 52 for manipulating or converting the gradation of the output image.
Including 2.

As the tag data representing the parameters of the color space, the same data as described in the first to fifth embodiments can be used.

FIG. 12 is a block diagram showing a ninth embodiment of computer system according to the present invention. Hereinafter, differences between FIG. 12 and FIG. 8 will be mainly described. In FIG. 12, an image data provider 600 is a storage device 602, for example, a PCMCIA (Personal Computer).
Miniature Communications Interface Adapter) memory card, disk drive device, or other storage device. The image data provider is connected to the CPU 202 via signal paths 110 and 112.

The CPU 202 generates area data indicating the display area 720 on the screen of the monitor 206A.
The CPU 202 sends the signal path 20 to the CS conversion module 704.
8 are connected. The CPU 202 is also connected to the sorting unit 702 via signal paths 210 and 710. The output of the sorting unit 702 is connected to the CS conversion module 704 via the signal path 212.

The operation of the sixth to ninth embodiments will be described below.

In FIG. 8, the image data provider 2
Reference numeral 15 denotes the image data of the first color space (CS1) and the tag data representing the parameters of the first color space via the signal paths 110 and 112, respectively.
Supply to U202. The CPU 202 is a monitor 206A
Area data corresponding to the display area 720 on which the image data is to be displayed is generated. CP
The U202 transmits the CS1 image data to the CS conversion module 704 in the output device 206 via the signal path 208 without converting the CS1 image data. The CPU 202 also transmits the tag data to the sorting unit 702 via signal path 210 and the area data to the sorting unit 702 via signal path 710 without conversion.

The sorting unit 702 determines whether each pixel is inside the display area 720 or outside the display area 720 based on the area data, and based on the determination result and the tag data, the CS conversion parameter for each pixel. Is output. In this case, for the pixels in the display area 720,
The tag supplied to the CPU 202 via the signal path 112.
A CS conversion parameter is generated based on the data.

On the other hand, for the pixels outside the display area 720, the CS conversion parameter is generated based on another data or by another method. For pixels outside the display area 720, CS is estimated based on the estimation that the color space of the image displayed outside the display area 720 is the default color space, for example.
The conversion parameter may be generated. Further, the CS conversion parameter for the pixel in the display area 720 may be applied to the pixel outside the display area 720. Furthermore, data indicating that the image outside the display area 720 is not CS-converted (CS conversion is performed such that the color space of the output image data is the same as the color space of the input image data) may be given.

The same CS conversion parameter as that of the previous pixel is used as in the case where the pixels within the display area 720 are continuously processed or the pixels outside the display area 720 are continuously processed. If so, that (using the same CS conversion parameters as the previous pixel)
May be generated and supplied to the CS conversion module 704 instead of the CS conversion parameter.

The CS conversion module 704 uses the C for each pixel.
CS conversion is performed for each pixel according to the S conversion parameter. As a result, the CS1 image data supplied from the image data supply source 216 is automatically converted into the image data of the second color space (CS2), that is, the image data of the color space for the monitor 206A, and the display area is displayed. 720 is displayed. The image outside the display area 720 is CS-converted using the CS conversion parameter defined separately from the image inside the display area 720 to be converted into the image data of the second color space, and is displayed outside the display area 720. To be done.

The CS conversion module 704 outputs the image data in the second color space of the image displayed in the display area 720 and the image outside the display area 720 to the monitor 206A via the signal path 214.

Similarly, in FIG. 11, the CS conversion module 706 uses the CS conversion parameters for each pixel supplied from the classification unit 702 to perform CS conversion on the image inside the display area 720 and the image outside the display area 720, respectively. To do.

Another embodiment of the CS conversion module 704 comprises the optional storage device 521 in FIG. In this alternative embodiment, the sorting unit 702 (for setting parameters) monitors the signal path 210 for tag data. If no tag data is received on the signal path 210 within a predetermined time period related to the transmission of image data, the sorting unit 7
02 estimates that the color space of the image data corresponds to the default color space. The storage device 521 stores parameters representing the default color space. Sorting unit 7
02 uses this default parameter to process unit 51
Supply to 0. The processing unit 510 performs CS conversion on the pixels in the display area 720 using the supplied default parameters as CS conversion parameters. The default color space may be sRGB, for example.

In FIG. 9, the CS1 image data and the tag data and area data related to the CS1 image data are transmitted from the server 304 via the network 302 to the signal paths 208, 210 and 71 by the image provider 300, respectively.
0 is transmitted. The output device 306 can interface with the network 302. The operations of the sorting unit 702, the CS conversion module 704, etc. are substantially the same as above.

In FIG. 10, the data provider 40
Under the control of the server 410, 6 transmits the CS1 image data and the tag data related thereto via the wireless network 408 to the antenna 401 via the wireless signal paths 414 and 416, respectively. The wireless interface 402 of the computing device 400 sends the CS1 image data and associated tag data to the signal paths 418 and 42.
Receive via 0. The wireless interface 402 is
The CS1 image data and associated tag data are transmitted to CPU 404 via signal paths 422 and 424.

The CPU 404 generates area data corresponding to the display area 720 where the image data from the data provider 406 should be displayed on the screen of the monitor 206A. The CPU 404 also transmits the CS1 image data to the CS conversion module 704 via the signal path 208 without conversion. The CPU 404 further
The tag data is transmitted to the sorting unit 702 via the signal path 210 without conversion. CPU 404 also transmits the area data to sorting unit 702 via signal path 710.

The operations of the sorting unit 702, the CS conversion module 704, etc. are substantially the same as above.

In FIG. 12, the image data provider 600, for example, the memory device 602 is shown in the first color space (C
The image data of S1) and the tag data representing the parameters of the first color space are supplied to the signal paths 110 and 112, respectively.
Is transmitted to the CPU 202 of the PC 200 via. CPU
The operation of 202 and the like is substantially the same as in FIG.

In the above embodiment, the number of display areas is one, but there may be a plurality of display areas. The shape of the display area is not limited to the rectangle. For example, when two or more windows partially overlap, the area corresponding to the front window is a rectangle, but the area corresponding to the rear window is a rectangle of the front window in the rectangle. The shape is excluded. Furthermore, when there are a plurality of display areas, each may display an image associated with a different color space. In that case, different CS conversion parameters may be used for each display area. In addition, when a plurality of windows are displayed, the CS conversion parameter is used only for the foreground window among the plurality of windows according to the purpose or need.
The conversion may be performed, or the CS conversion may be performed using the CS conversion parameter only for some of the plurality of windows.

FIG. 13 shows an embodiment (tenth embodiment) in which two different original image data from two different image data sources are displayed in two display areas. The image processing system shown in FIG. 13 is similar to the image processing system shown in FIG. 8, but different in the following points. That is, the image data provider 215 comprises a second image data source 216 '. This second image data source 216 'is the (first) image data source 2
Similar to 16, it is connected to the CPU 202 via the network 218 managed by the server 220.

The second image data source 216 'has a first
Image data (second original image data) in a color space (fourth color space CS4) different from or the same as the above color space and tag data (second tag data) related thereto are supplied. It is a thing.

The output device 206 of this embodiment is supplied from the (first) image data supply source 216 (first).
The image obtained by converting the original image data (CS1) is displayed in the (first) display area 720 which constitutes a part of the display screen of the monitor 206A, and the second image data source The image obtained by converting the second original image data (CS4) supplied from 216 ′ is displayed in the second display area 720 ′ that constitutes another part of the display screen of the monitor 206A.

The CPU 202 uses the second display area 72.
The second area data indicating 0'can be generated.

Based on the first and second area data, the sorting unit 702 determines whether each pixel is in the first area, the second area, or both the first and second areas. It is determined whether or not it is located outside the, and based on the determination result and the first and second tag data,
Inside the first display area 720, the second display area 72
The CS conversion parameter for each pixel is generated for the inside of 0'and each of these outside.

The CS conversion module 704 supplies the first image data source 216 with the first image data source 216 based on the color space conversion parameters for the first display area 720 supplied from the sorting unit 702. The original image data is converted into image data of the second color space (CS2) to be displayed in the first display area 720.

The CS conversion module 704 also has a second display area 72 supplied from the sorting unit 702.
The second original image data supplied from the second image data supply source 216 ′ should be displayed in the second display area 720 ′ based on the color space conversion parameter for the interior of 0 ′. It is converted into image data in the second color space (CS2).

The CS conversion module 704 further includes the display areas 720 and 7 generated by the sorting unit 702.
20 'based on the color space conversion parameters for both the first and second display areas 720 and 720'.
The original image data for the outside of the display area 720
And 720 ′ are converted into image data of the second color space that should be displayed in a portion other than the above.

In FIG. 13, the first image data provider 215 is the first original image data of the first color space (CS1), and the first image data provider 215 represents the parameters of the first color space.
Of the tag data of the above is supplied to the CPU 202 of the PC 200 via the signal paths 110 and 112, respectively. Further, the second image data provider 215 ′ sends the second original image data of the fourth color space (CS4) and the second tag data representing the parameters of the fourth color space to the signal paths, respectively. CPU 20 of PC 200 via 110 and 112
Supply to 2.

The CPU 202 generates the first area data corresponding to the first display area 720 in which the first original image data is displayed on the screen of the monitor 206A, and the second original image data is displayed. Second displayed
Second area data corresponding to the display area 720 ′ of The CPU 202 outputs the first original image data and the second original image data to the output device 2 via the signal path 208.
It is transmitted to the CS conversion module 704 in 06. CPU
202 also sorts the first and second tag data and the first and second area data via signal paths 210 and 710, respectively, in a sorting unit 702 within output device 206.
To transmit.

The sorting unit 702 determines that each pixel has the first display area 72 based on the first and second area data.
0, or in the second display area 720 ',
It is determined whether these are outside, and the CS conversion parameter for each pixel is output based on the determination result and the first and second tag data. In this case, the first display area 7
For pixels in 20, CPU via signal path 112
CS based on the first tag data supplied to 202
The conversion parameter is generated, and for the pixel in the second display area 720 ′, the CPU 202 is connected via the signal path 112.
CS conversion parameters are generated based on the second tag data supplied to the display area 720 and the pixels outside the second display area 720 ′ based on another data or by another method. Generate a CS conversion parameter with.

The CS conversion module 704 uses the C for each pixel.
CS conversion is performed for each pixel according to the S conversion parameter. As a result, the CS1 image data supplied from the first image data supply source 216 is automatically converted into the image data of the second color space (CS2), that is, the image data of the color space for the monitor 206A. , First display area 720
The CS4 image data displayed in the second image data source 216 ′ is displayed in the second color space (CS2).
Of the second display area 72, which is automatically converted into the image data of the color space for the monitor 206A.
The images displayed in 0'and outside the display areas 720 and 720 'are the images in the display area 720 and the display area 72.
The image in 0 ′ is CS-converted by using a CS conversion parameter defined separately, and converted into image data in the second color space, which is displayed outside the display area 720.

The CS conversion module 704 uses the image displayed in the first display area 720 and the second display area 7
20 'and the image data of the second color space outside the display areas 720 and 720' are displayed on the signal path 214.
To the monitor 206A via.

In FIG. 13, the second image data supply source 2
Although 16 'is shown as being separate from the first image data supply source 216, the first and second original image data may be supplied from the same image data supply source. In addition, the first color space (CS1) and the fourth color space (C
S4) are not necessarily different from each other and may be the same.

In the above description of the tenth embodiment,
The image in the display area (720, 720 ') is CS converted using the CS conversion parameter formed based on the tag data supplied together with the original image data from the image data supply source (216, 216'). However, similar to the description of the first to ninth embodiments with reference to FIGS. 5 and 11, if the tag data related to the first original image is not received, the first C based on the assumption that the color space of the original image data of
Tags that perform S color conversion and are related to the second original image
If no data is received, the CS based on the assumption that the color space of the second original image data is the default color space.
Color conversion may be performed.

Several advantages of the present invention will be described.
Since the CS conversion module was moved to the output device, the CPU
Eliminates the need to convert the image data from the first color space to the second color space. This allows a computing device equipped with this technology to display a moving image that cannot be displayed depending on the background art. By sending the tag data to the CS conversion unit to automate the conversion, the present invention provides
The observer / user does not need to optimize the output device settings each time the color space of the input image data changes.

Furthermore, by moving the CS conversion module to an output device, the computing device according to the invention can drive multiple output devices (designed for different color spaces) simultaneously. Also, multiple output devices can simultaneously convert image data into its visually perceptible analog in real time.

The present invention allows the CPU to be independent of the output device. In other words, the CPU can transmit the image data to the output device in an object-oriented manner, ie without the CPU having to adapt the image data to the details or particularities of the output device. Conversely, the output device according to the invention is independent of the image data source. That is, the output device can output image data of any color space without having to receive the image data converted into the color space of the output device.

Further, according to the sixth to tenth embodiments, CS conversion is performed on the image inside the display area using the CS conversion parameter determined based on the tag data (external to the display area). The same CS conversion parameter or different CS conversion parameters can be used for each image), so that the CS conversion in the display area can be automatically performed, and the observer / user can change the color space of the input image data. It is no longer necessary to optimize the settings of the display device each time.

Further, CS is displayed for each display area.
Since the conversion parameter is automatically generated and the image of each display area is CS-converted using the generated CS conversion parameter, optimum color reproduction can be obtained for each display area.

The present invention can be variously modified. Such modifications do not depart from the spirit and scope of the invention. All variations obvious to those skilled in the art are intended to be within the scope of the claims.

[0156]

According to the image processing method of the first aspect, since the output device performs the CS conversion based on the tag data, it is connected to another device for controlling the output device, for example, the output device. The CPU of the personal computer
It is not necessary to convert the image data from the first color space to the second color space. Therefore, the moving image can be displayed at a speed that cannot be displayed by the background art. Also, tags
Since the data is sent to the output device and the conversion is performed based on the data, the observer /
The user does not need to work to optimize the settings of the output device.

Further, since the output device performs color space conversion, even if a device for controlling the output device, such as a personal computer, is used in common, a plurality of output devices, such as a monitor and a printer, can simultaneously operate. Image data can be converted to its visually perceptible analog in real time.

Furthermore, the computing device for controlling the output device, for example the CPU of a personal computer, can be independent of the output device. In other words, CPU
The transmission of image data to the output device by means of an object-oriented manner, ie CP
U outputs the image data to the output device in detail or characteristics (particular
can be done without the need to adapt.
Conversely, according to the present invention, the output device is independent of the image data source. That is, the output device can output image data of any color space without having to receive the image data converted into the color space of the output device.

According to the image processing method of claim 2,
The content of the image processing to be performed on the characteristics of the tag data in the color space or the output characteristics is clearly shown. Since the tag data includes a code for identifying (indicating) the color space, it is possible to represent the characteristics of the color space with a small number of data. Moreover, since the tag data includes the chromaticity, gradation characteristics, and color reproduction characteristics of the primary colors, it is possible to flexibly represent not only the color space defined in advance but also the characteristics of various color spaces.

Furthermore, due to the influence, it is desirable for a user / observer who is familiar with the color reproduction of a home television apparatus to switch between different color reproductions for a still image and a moving image. Since such a switching can be automatically performed by using the image / video identification code, it is said that the user / observer will re-optimize each time when switching between a still image and a moving image. You can save time.

In general, the color reproduction of a home-use television is often bright with a white point shifted to a high color temperature side as compared with a personal computer system. On the other hand, in addition to the switching based on the above-mentioned still image / moving image identification code, it is also possible to automatically adjust by the tag data indicating the white point and the brightness.

On the other hand, since the tag data includes the parameters for image processing, it is not necessary to determine the content of the image processing from the characteristics of the color space, and the processing can be performed using the parameters included in the tag data as they are. Since it is sufficient, the load on the image output device can be reduced.

According to the image processing method of claim 3,
Since the tag data is a combination of chromaticity and gradation characteristics of primary colors, it is possible to clearly represent various color spaces. Further, since the gradation characteristic includes the gamma value of the first color space and the table value for gradation conversion,
It is possible to realize a desired gradation characteristic by gradation conversion using the table value. Therefore, in the image output device, it is only necessary to set the table value, and the load on the image output device can be reduced. Furthermore, since the color reproduction characteristic includes the level of the RGB signal of the specific color, the color reproduction characteristic can be represented by the information that is easy to process by the hardware called the RGB signal level, while the color reproduction characteristic has the hue and color. By including the combination of the degree and the lightness, it is possible to represent the color reproduction characteristic by information close to human sense.

According to the image processing method of claim 4,
If the output device does not send the tag data together with the image data, the output device estimates that the first color space is the default color space and performs the conversion, so that the color space can be appropriately converted. .

According to the image processing method of claim 5,
If the output device does not send the tag data together with the image data, the output device estimates that the first color space is the default color space and performs the conversion, so that the color space can be appropriately converted. .

According to the image processing method of claim 6,
Since the default color space is sRGB, it is an international standard color space, and it is not necessary to add tag data to an image conforming to sRGB that frequently appears.

According to the image processing method of claim 7,
The content of the image processing to be performed on the characteristics of the tag data in the color space or the output characteristics is clearly shown. Since the tag data includes a code for identifying (indicating) the color space, it is possible to represent the characteristics of the color space with a small number of data. Moreover, since the tag data includes the chromaticity, gradation characteristics, and color reproduction characteristics of the primary colors, it is possible to flexibly represent not only the color space defined in advance but also the characteristics of various color spaces.

Furthermore, due to the influence, it is desirable for a user / observer who is familiar with the color reproduction of a home-use television apparatus to switch between different color reproductions for a still image and a moving image. Since such a switching can be automatically performed by including the image / video identification code, it is said that the user / observer will re-optimize each time the user / observer switches between a still image and a moving image. You can save time.

In general, the color reproduction of a home-use television is often bright with a white point shifted to a high color temperature side as compared with a personal computer system. On the other hand, in addition to the switching based on the above-mentioned still image / moving image identification code, it is also possible to automatically adjust by the tag data indicating the white point and the brightness.

On the other hand, since the tag data includes the parameters for image processing, it is not necessary to determine the contents of the image processing from the characteristics of the color space, and the processing can be performed using the parameters included in the tag data as they are. Since it is sufficient, the load on the image output device can be reduced.

According to the image processing method of claim 8,
Since the tag data is a combination of chromaticity and gradation characteristics of primary colors, it is possible to clearly represent various color spaces. Further, since the gradation characteristic includes the gamma value of the first color space and the table value for gradation conversion,
It is possible to realize a desired gradation characteristic by gradation conversion using the table value. Therefore, in the image output device, it is only necessary to set the table value, and the load on the image output device can be reduced. Furthermore, since the color reproduction characteristic includes the level of the RGB signal of the specific color, the color reproduction characteristic can be represented by the information that is easy to process by the hardware called the RGB signal level, while the color reproduction characteristic has the hue and color. By including the combination of the degree and the lightness, it is possible to represent the color reproduction characteristic by information close to human sense.

According to the image processing method of claim 9,
By expressing the hue, the saturation, and the brightness as absolute values, it is possible to give the hue, the saturation, and the brightness regardless of the characteristics of the image display device. In addition, since hue, saturation, and lightness are represented by relative values, it is possible to give hue, saturation, and lightness by the difference from the characteristics of the image display device, and the image display device can correspond to the given values. It suffices to change the characteristics by the amount to do.

According to the image processing method of the tenth aspect, when the original image supplied from the provider is displayed in the display area forming a part of the display screen of the display device,
Since the CS conversion is performed on the original image using the CS conversion parameters generated based on the tag data associated with the original image and is displayed in the display area, it is appropriate for the image in the display area. CS conversion can be performed.

According to the image processing method of the eleventh aspect, when a plurality of original images are displayed in different display areas, CS conversion using optimum CS conversion parameters is performed for each image. You can

According to the image processing method of the twelfth aspect, for the image displayed outside the display area, the CS conversion is performed using the CS conversion parameter defined separately from the image displayed in the display area. Since the display is performed on-the-fly, optimal CS conversion can be performed on the image displayed in the display area and the image displayed outside the display area.

According to the image processing system of the thirteenth aspect, since the output device performs CS conversion based on the tag data, another device for controlling the output device, for example, a personal computer connected to the output device.・ Computer CPU
However, it is not necessary to convert the image data from the first color space to the second color space. Therefore, the moving image can be displayed at a speed that cannot be displayed by the background art. Further, since the tag data is sent to the output device and conversion is performed based on this, it is necessary for the observer / user to perform work for optimizing the settings of the output device each time the color space of the input image data changes. Disappears.

Further, since the output device performs color space conversion, even if a device for controlling the output device, for example, a single personal computer is shared, a plurality of output devices, such as a monitor and a printer, can simultaneously operate. Image data can be converted to its visually perceptible analog in real time.

Furthermore, the computing device for controlling the output device, for example the CPU of a personal computer, can be made independent of the output device. In other words, CPU
The transmission of image data to the output device by means of an object-oriented manner, ie CP
U outputs the image data to the output device in detail or characteristics (particular
can be done without the need to adapt.
Conversely, according to the present invention, the output device is independent of the image data source. That is, the output device can output image data of any color space without having to receive the image data converted into the color space of the output device.

According to the image processing system of the fourteenth aspect, the output device estimates that the first color space is the default color space when the tag data is not sent together with the image data. Since the conversion is performed, the color space can be appropriately converted.

According to the image processing system of the fifteenth aspect, the output device estimates that the first color space is the default color space when the tag data is not sent together with the image data. Since the conversion is performed, the color space can be appropriately converted.

According to the image processing system of the sixteenth aspect, since the provider includes the computing device and the communication channel includes the direct connection between the computing device and the output device, the output device directly communicates with the computing device. In the connected configuration, the same effect as described in claim 13 or 15 can be obtained.

Further, in the configuration in which the output device is directly connected to the storage device by the provider including the storage device and the communication channel including a direct connection between the storage device and the output device, the output device is directly connected to the storage device. The same effect as described above can be obtained.

Further, in the configuration in which the output device is connected to the server via the network, the provider includes the server, and the communication channel includes the network to which the output device is connected.
The same effect as described above can be obtained.

According to the image processing system of the seventeenth aspect, the output device includes a constituent element of a personal computer (for example, a personal computer) connected to the network, so that the personal computer connected to the network is With the configuration including the above, the effect described in claim 13 or 15 can be obtained.

According to the image processing system of the eighteenth aspect, since the network is wireless, in addition to the effect described in the seventeenth aspect, there is no trouble of network wiring and the network wiring is It also has the effect of not getting in the way.

According to the image processing system of the nineteenth aspect, in two output devices for converting image data of different color spaces into their visually recognizable analogs, the image data from the same source are It is possible to perform color conversion and output at substantially the same time.

According to the image processing system of claim 20, when the original image supplied from the provider is displayed in the display area forming a part of the display screen of the display device, the original image is associated with the original image. C for the original image using the CS conversion parameter generated based on the tag data
Since the S conversion is performed and the image is displayed in the display area, the CS conversion can be appropriately performed on the image in the display area.

According to the image processing system of the twenty-first aspect, when a plurality of original images are displayed in different display areas, CS conversion using optimum CS conversion parameters is performed for each image. You can

According to the image processing system of the twenty-second aspect, for the image displayed outside the display area, the CS conversion is performed using the CS conversion parameter defined separately from the image displayed in the display area. Since the display is performed on-the-fly, optimal CS conversion can be performed on the image displayed in the display area and the image displayed outside the display area.

[Brief description of drawings]

FIG. 1 Background Art Personal Computer
It is a block diagram of a system.

FIG. 2 is a first computer system according to the present invention.
It is a block diagram showing an embodiment of.

FIG. 3 is a second computer system according to the present invention.
It is a block diagram showing an embodiment of.

FIG. 4 is a third computer system according to the present invention.
It is a block diagram showing an embodiment of.

FIG. 5 is a detailed view of a color conversion module according to the present invention.

FIG. 6 is a fourth computer system according to the present invention.
It is a block diagram showing an embodiment of.

FIG. 7 is a fifth computer system according to the present invention.
It is a block diagram showing an embodiment of.

FIG. 8 is a sixth computer system according to the present invention.
It is a block diagram showing an embodiment of.

FIG. 9 is a seventh computer system according to the present invention.
It is a block diagram showing an embodiment of.

FIG. 10 is a block diagram showing an eighth embodiment of a computer system according to the present invention.

FIG. 11 is a detailed view of a color space conversion module according to the present invention.

FIG. 12 is a block diagram showing a ninth embodiment of a computer system according to the present invention.

FIG. 13 is a block diagram showing a tenth embodiment of a computer system according to the present invention.

[Explanation of symbols]

110, 112 signal path, 200 PC, 202
CPU, 204, 204 'CS conversion module,
206, 206 'output device, 206A, 206B,
206B 'converter, 208, 210, 212, 21
4 signal paths, 215 image data providers, 21
8 network, 220 server, 300 image data provider, 302 network, 30
4 server, 306 output device, 400 PC,
402 wireless interface, 404 CPU,
406 image data provider, 408 network, 410 server, 414, 416, 418,
420 signal path, 502 image data provider,
504 communication channel, 506 CS conversion module, 508 parameter setting unit, 512
Input image processing unit, 514 color conversion unit,
516 output image processing unit, 518 output device,
520 and 522 gradation conversion unit, 521 storage device, 600 image data provider, 602 storage device, 702 classification unit, 704 CS conversion module, 706 CS conversion module, 712
Signal path, 710 Signal path, 720 Display area.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04N 1/60 H04N 1/40 D 5C082 F term (reference) 5B021 AA01 BB02 CC06 LG07 LG08 5B057 AA01 CA01 CA08 CA12 CA16 CB01 CB08 CB12 CB16 CC01 CE17 5C066 AA03 DD01 EB01 GA01 GA05 KE20 5C077 LL20 MP08 PP32 PQ12 PQ18 TT10 5C079 HB11 MA04 NA03 5C082 AA01 AA02 AA27 AA32 BA34 BA35 BA36 BB53 BD10 CA12 DA73 DA73 DA86

Claims (22)

[Claims] 1. A method of outputting original image data generated in association with a first color space with an output device for converting image data in a second color space into its visually recognizable analog. Receiving the original image data generated according to the first color space from the provider via the communication channel, and tag data representing the parameters of the first color space together with the original image data in the communication channel. Receiving from the provider via, and the output device automatically converting the original image data into the second color space according to the tag data and converting the second color space. An image processing method, the method further comprising: generating converted image data; and the output device converting the converted image data into a visually recognizable analog thereof. 2. The tag data is a code for identifying a color space, primary color coordinate values, white point, brightness, gradation characteristics, color reproduction characteristics, still image / moving image identification code, or for image processing. The image processing method according to claim 1, wherein the image processing method includes a parameter. 3. The tag data is a combination of the primary color coordinate value and the gradation characteristic, or the gradation characteristic is a gamma value for the first color space and a table value for gradation conversion. RG of the specific color including or
The image processing method according to claim 2, wherein the image processing method includes one of B signal levels or a combination of coordinate values of hue, saturation, and lightness. 4. Monitoring the presence of tag data representing a parameter of one color space along with the image data via the communication channel; and when no tag data is received on the communication channel, Based on the estimation that the first color space is the default color space and the estimation that the first color space is the default color space, the output device outputs the original image to the second color space. The image processing method according to claim 1, further comprising: converting into a color space to generate converted image data in the second color space. 5. A method of outputting original image data generated in association with a first color space by an output device for converting image data in a second color space into its visually recognizable analog. Receiving the original image data generated according to the first color space from the provider via the communication channel, and the tag representing the parameters of one color space together with the image data via the communication channel. Monitoring for the presence of data, estimating that the first color space is a default color space if no tag data is received on the communication channel, and the first color space is the default color space. The output device transforms the original image into the second color space based on the estimation that it is a color space to generate transformed image data of the second color space. Fact and the output device, an image processing method including the converting the converted image data to the visually perceptible analog to. 6. The image processing method according to claim 5, wherein the default color space is sRGB. 7. The output device further comprises retrieving or obtaining data representing parameters of the default color space, wherein the parameters are a code specifying a color space, primary color coordinate values, white point, brightness, floor, The image processing method according to claim 5, further comprising a tonality characteristic, a color reproduction characteristic, a still image / moving image identification code, or a parameter for image processing. 8. The parameter includes a combination of the primary color coordinate value and the gradation characteristic, or the gradation characteristic is a gamma value for the first color space and a table value for gradation conversion. Or the color reproduction characteristic includes one of RGB signal levels for a specific color, or a combination of respective coordinate values of hue, saturation, and lightness. Image processing method. 9. The image processing method according to claim 3, wherein the hue, saturation and lightness coordinate values are represented by absolute values or relative values. 10. The output device is a display device capable of displaying an image obtained by conversion of the original image data in a display area forming a part of a display screen, and the display device is A color space conversion parameter for the display area is generated based on area data indicating a display area and tag data related to the original image data, and the original image data is generated based on the generated color space conversion parameter. Is converted into image data of the second color space that represents an image displayed in the display area, and the image processing method according to claim 1 or 5. 11. The display device comprises a third color space (CS) in a second display area which constitutes another part of the display screen.
The image obtained by converting the second original image data generated according to 4) can be displayed, and further, the second original image data is received from the provider via a communication channel, and Receiving second tag data representing a parameter of a third color space (CS4) together with the second original image data from the provider via a communication channel, and the display device including the second Based on the second area data indicating the display area, the second tag data, or the estimation that the third color space (CS4) is the default color space. A color space conversion parameter for the second display area is generated, and the second original image data is displayed in the second display area based on the generated color space conversion parameter. The image processing method according to claim 10, further comprising converting into image data of the second color space that represents an image to be displayed. 12. The display device is capable of displaying third original image data on a portion of the display screen other than the display area, and the display device displays the third original image data on the area data. Based on the generated color space conversion parameter, a color space conversion parameter for a part other than the display area is generated based on the generated color space conversion parameter. 11. The image processing method according to claim 10, wherein the image data is converted into image data of the second color space that represents an image displayed in. 13. An output device for converting original image data generated in association with a first color space, converting image data in a second color space into a visually perceptible analog of the image data, and outputting the analog image data. An image processing system having (206, 306), the image data provider (215, 300, 406, 5).
02, 600), a communication channel (208, 210), and an output device (206, 306) for converting image data of the second color space into its visually recognizable analog. Can receive the original image data generated according to a first color space from the provider via the communication channel, and the output device represents the parameters of the first color space together with the image data. Tag data may be received from the provider via the communication channel, the output device converting the original image data associated with the first color space according to the tag data to generate the second image data. Of the color space of the converted image data, wherein the output device can visually recognize the converted image data. An image processing system, characterized in that that can be converted. 14. The output device (206, 306) comprises:
The presence of tag data representing color space parameters can be monitored along with the image data via the communication channel, and if the output device does not receive tag data on the communication channel, It can be estimated that the first color space is a default color space, and the output device determines that the first color space is the default color space based on the estimation that the first color space is the default color space. 14. The image processing system according to claim 13, wherein the related original image data can be converted to generate converted image data in the second color space. 15. An output device for converting original image data generated in association with a first color space into image data of a second color space, and converting the image data into a visually recognizable analog of the image data for output. An image processing system including: an image data provider (215, 300, 406, 5
02, 600), a communication channel (208, 210), and an output device (206) for converting image data in the second color space into its visually recognizable analog, the output device (206 ) Can receive the original image data generated according to the first color space (CS1) from the provider via the communication channel, and the output device (206) via the communication channel. , Along with the image data, the presence of tag data representing color space parameters can be monitored, and if the output device (206) does not receive tag data on the communication channel, the first Can be estimated to be the default color space, and the output based on the estimation that the first color space is the default color space The device can convert the original image data (CS1) associated with the first color space to generate converted image data (CS2) of the second color space, the output device (206) The image processing system, wherein the converted image data (CS2) can be converted into its visually recognizable analog. 16. The provider comprises a computing device, the communication channel comprises a direct connection between the computing device and the output device, or the provider comprises a storage device (6).
02), the communication channel includes a direct connection between the storage device and the output device (206), or the provider includes a server (304) and the communication channel is connected to the output device. A network (302) that includes an open network (302).
The image processing system according to 3 or 15. 17. A personal computing device (200, 40) wherein said output device (206) is connected to said network.
The image processing system according to claim 13 or 15, wherein the image processing system includes the component (0). 18. The image processing system of claim 17, wherein the network connection (408) is wireless. 19. The output device (206) is a first output device (206), the converted image data is first converted image data (CS2), and the image processing system is a first output device (206). Image data (C
At least a second output device (206 ') for converting S3) into a visually perceptible analog of the image data, wherein the provider converts the original image data into the second output device (206'). The provider can transmit the tag data together with the image data to the second output device (206 ′), and the second output device (206 ′) can transmit the tag data to the second output device (206 ′). According to the tag data, the original image data related to the first color space is converted to the image data (CS3) of the third color space,
Second transformed image data can be generated, wherein the first output device (206) transforms the first transformed image data (CS2) into its visually perceptible analog. At about the same time as the above, the second output device (20
6 ') is the second converted image data (CS3)
The image processing system according to claim 13 or 15, wherein the image can be converted into a visually recognizable analog. 20. The display device is a display device capable of displaying an image obtained by conversion of the original image data in a display area (720) forming a part of a display screen. A parameter generation unit (702) for generating a color space conversion parameter for the display area based on area data indicating the display area and tag data related to the original image data; and the generated color. A processing unit (5) for converting the original image data into image data of the second color space representing an image displayed in the display area based on the space conversion parameter.
10) and 15 are included.
The image processing system described in 1. 21. The display device further comprises a fourth color space (CS) in a second display area which constitutes another part of the display screen.
4) is capable of displaying an image obtained by converting the second original image data, wherein the provider (215) supplies the second original image data, and the display device The second original image data can be received from the provider through the communication channel, and the display device represents the parameter of the fourth color space (CS4) together with the second original image data. 2 tag data can be received from the provider via the communication channel, and the parameter generating unit (702) further includes the second area data indicating the second display area based on the second area data. Based on the tag data of No. 2 or the assumption that the fourth color space is the default color space, the display area of the second display area is changed. A color space conversion parameter for generating a color space conversion parameter, and the processing unit (510) represents the second original image data based on the generated color space conversion parameter, and represents an image displayed in the second display area. The image processing system according to claim 20, wherein the image processing system can be converted into image data of the second color space. 22. The display device is capable of displaying the third original image data on a portion of the display screen other than the display area, and the parameter generation unit (702) A color space conversion parameter for a portion of the display screen other than the display area is generated based on the area data, and the processing unit (510) generates the color space conversion parameter based on the generated color space conversion parameter. The original image data of 3
21. The image processing system according to claim 20, wherein the image processing system converts the image data into an image data of the second color space that represents an image displayed in a portion other than the display area.