CN100571328C - Method and system for adjusting digital image display - Google Patents

Abstract

The present invention relates to a method and system for adjusting the display of a digital image. A pointer (or cursor) is used to mark one or more coordinates in a display area to obtain a position reference. After selecting a display ratio or generating a display ratio according to the marked coordinates, the adjusted image is displayed at a specific position in the display area according to the display ratio with the position reference. Compared with adjusting the image and then positioning it by continuous translation, a lot of computing costs and hardware costs can be saved.

Description

Method and system for adjusting digital image display

technical field

The present invention relates to a method and system for image display, in particular to a method and system for marking the display position of an image and adjusting the display ratio by using a pointer or a cursor.

Background technique

In image display, it is often necessary to display the image data on the screen at a certain ratio. This type of application is often built into many software or hardware, such as image editing software or digital cameras to enlarge or enlarge the image to be displayed. zoom out.

In the prior art, this type of application usually takes the image position (such as a pixel) where the image data is located in the center of the display area as the position reference. Generate an image. Since the new image must exceed or be smaller than the original display range when the display scale is changed, the user must shift the screen so that the part of the desired image can be displayed in the display area. This means that a lot of computing costs will be consumed, as shown in Figure 1, first in step 110, a display scale and a position reference are obtained, and there are many ways to obtain the display scale, such as in a set of default display scales Select one to take out, increase the display scale by a default proportion, or directly input by the user. The position reference is generally obtained from the position of the center of the display area and the upper left corner (such as the first pixel position of the display area) in the display data. Then, as shown in step 120, all the image data are scaled according to the display ratio to generate a new image. Next, as shown in step 130 , the image is displayed in the display area based on the position. Finally, as described in step 140, the image is continuously panned until the desired image portion is displayed in the display area.

In the above-mentioned method, the image is generated after adjusting the ratio of all the image data. If the image data is very large, there will be the following disadvantages. First of all, the general image is usually stored in a frame buffer (frame buffer) before outputting. The method of the prior art means that the frame buffer of the image also needs to be very large, and only a part of the frame buffer of the image will be used. It is used to display in the display area, and other parts are left idle. In addition, when the image is shifted each time, a part of the image needs to be reacquired from the image frame buffer for display and in the display area, which requires a lot of computing costs. Furthermore, before the image is shifted, the image displayed after the shift cannot be expected, so it is necessary to continuously shift until it is appropriate. Each translation requires extra power and time. If it is applied to a portable device (such as a digital camera) that values cost and power, the hardware cost and battery power usage will become very uneconomical.

Apparently, among the above methods, it is uneconomical to continuously pan the image after adjusting the display ratio. Therefore, there is a need for a more economical method or system for portable devices.

Contents of the invention

According to the aforementioned requirements, a main purpose of the present invention is to overcome the deficiencies and defects of the prior art, and propose a method and system for adjusting digital image display with a single coordinate and a display ratio, so that users can arbitrarily select the display area part of the image to redisplay after zooming in or out.

In addition, another main purpose of the present invention is to propose a method and system for adjusting digital image display with several coordinates, allowing users to select two coordinates or mark a range to obtain position reference and display scale, so as to facilitate users to arbitrarily Select part of the image in the display area to zoom in or out and redisplay it. Because the re-displayed picture can be expected in the original picture, there is no need to continuously shift the picture, which can save a lot of computing cost, and can also save a lot of cost of the image frame buffer.

To achieve the above object, the present invention provides a method for adjusting digital image display with a single coordinate, which includes: displaying an image in a display area, the image is displayed based on an image data; obtaining the image data through a cursor A position reference, the position reference is obtained at a coordinate of the image data relative to the display area; the display ratio is obtained by selecting one of a plurality of preset display ratios; and the image data is obtained according to the display ratio A redisplayed image is generated in the display area relative to the position.

To achieve the above object, the present invention also provides a method for adjusting digital image display with several coordinates, which includes: displaying an image in a display area, the image is displayed based on an image data; obtaining the image through a cursor A first coordinate of the data; obtaining a second coordinate of the image data through the cursor; obtaining a position of a re-displayed image corresponding to the first coordinate and the second coordinate according to the first coordinate and the second coordinate A reference; obtaining the display ratio by selecting one of a plurality of preset display ratios; and redisplaying the redisplayed image in the display area according to the display ratio and the position reference.

In order to achieve the above purpose, the present invention also provides a system for adjusting digital image display, which includes: an image storage unit for storing an image data; an interface unit for obtaining a position reference through a cursor, and using a preset The display ratio is obtained by selecting one of a plurality of display ratios, wherein the position reference is a specific position in the image data; an image processing unit is used to generate and display the image data in accordance with the display ratio and the position reference the image in the display area; and a display unit for displaying the image in the display area.

Description of drawings

Fig. 1 is the schematic flow chart of prior art;

FIG. 2A is a schematic flow diagram of a specific embodiment of the present invention;

Figure 2B is a schematic diagram of the steps in Figure 2A;

FIG. 3A is a schematic flow diagram of a specific embodiment of the present invention;

Figure 3B is a schematic diagram of the steps in Figure 3A;

FIG. 4 is a functional block diagram of another specific embodiment of the present invention.

Detailed ways

Some embodiments of the present invention are described in detail as follows. However, the invention can be practiced broadly in other embodiments than those described in detail, and the scope of the invention is not limited, which is to be determined by the scope of the claims.

Furthermore, in order to provide a clearer description and a better understanding of the present invention, various parts in the figures are not drawn in accordance with their relative sizes, some dimensions have been exaggerated compared with other relevant scales; irrelevant details are not fully drawn , for simplicity of the icon.

In the prior art, when image adjustment is to be performed, the method of first adjusting the scale and then panning the frame is used, so a relatively large image frame buffer and operation cost are required. Therefore, the main feature of the present invention is to first mark the position reference actually to be displayed in the screen, and then calculate a new screen based on the position reference according to the display ratio (which can be preset or adjusted by the user), and redisplay it in the display area (Example: LCD or OLED panel). Therefore, there is no need to continuously shift the picture during the image adjustment process, so a lot of computing cost can be saved. Also because the screen does not need to be continuously shifted, it is not necessary to adjust the ratio of all the image data for the panning, but only need to adjust the ratio of part of the image data required by the new screen to generate a new image, so it can save No image frame buffer is necessary. In addition, the pixels of the generated new image can be sequentially generated and directly output to the display area without the need of an image frame buffer.

Therefore, a specific embodiment of the present invention is a method for adjusting digital image display with a single coordinate, as shown in FIG. 2A , which is a schematic flowchart of this embodiment. Firstly, the image is displayed in the display area by step 210. The image can be displayed according to the image data format after the image information is obtained by the digital capture device, and the image data can be stored in different formats (for example: pixels, files) In different storage media (for example: disk, memory card, memory, etc.), the present invention does not limit the format and storage method of image data. In addition, the image displayed in the display area may only represent part or all of the data of the captured image, and the present invention does not limit the scope of the captured image data that can be displayed in the display area. The block 2100 in FIG. 2B is a schematic diagram of the corresponding step 210 .

Then, as shown in step 220, a position reference of the image data is obtained. The position reference is obtained according to a coordinate of the image data relative to the display area, that is, the relative position of the coordinate represented in the display area in the image data is used. as a location reference. For example, a pointer (such as a cursor; Cursor) can be moved to this coordinate to obtain the position reference, or the user can input the coordinates to obtain the position reference coordinate. The coordinate reference is the relative position relative to the coordinate in the image data. That is, find out what is used to display this coordinate in the image data. The relative position can be a relative coordinate or a pixel position, and the present invention does not limit the method of obtaining the position reference and the expression of the relative position. In addition, in step 220, the coordinates of the center position of a display area can also be obtained at the same time, so as to serve as a reference coordinate point when re-displaying the image. The block 2200 in FIG. 2B is a schematic diagram of the corresponding step 220 .

Next, according to the position reference corresponding to the position of the cursor in step 220 , and as shown in step 230 , a display scale is obtained. There are many ways to obtain this display ratio, such as increasing the display ratio proportionally with a preset ratio, or choosing a ratio from a group of preset display ratios to increase the display ratio proportionally, or by The user directly inputs, and the method of obtaining the display ratio is not limited in the present invention.

Finally, as shown in step 240 , the display image is directly regenerated from the image data according to the display scale and position reference, or the image is displayed in the display area with reference to the coordinates of the center position. The display of the image is based on the location of the pointer as the anchor point, and the anchor point can be any specific position in the display area, for example, the specific position can be the center of the display area, the four corners of the display area (such as the upper left corner, upper right corner, lower left corner and lower right corner) or other positions, the present invention is not limited to this specific position. Then, the image is regenerated in the display area according to a display ratio. In addition, the regenerated image can be enlarged or reduced according to a preset display ratio, or the original image data can be directly multiplied by the display ratio to enlarge or enlarge. zoom out. In addition, the size of the image can only match the display area (i.e. only use partial image data to generate an image), it can exceed the display area (i.e. use the entire image data to generate an image), or refer to the coordinates of the center position and then place the image Displayed in the display area, the present invention does not limit the size of the image. The former can save the cost of the image frame buffer, or even directly display in the display area without the image frame buffer, while the latter can save the time for the user to pan the image, but it consumes more computing costs (such as power) and requires a large number of image frames buffer. The block 2300 in FIG. 2B is a schematic diagram after the processing of the corresponding step 240 . Accordingly, this embodiment not only has the function of panning in the prior art, but also allows the user to select images more conveniently and save time and effort.

Another specific embodiment of the present invention is a method for adjusting digital image display by several coordinates. FIG. 3A is a schematic flowchart of this embodiment. The difference between this embodiment and the previous embodiment lies in that the steps 220 and 230 in FIG. 2A are respectively replaced by steps 320 and 330 in this example. In step 320, a first coordinate 3110 (as shown in FIG. 3B ) and a second coordinate 3120 (as shown in FIG. 3B ) are obtained, and the acquisition of the first coordinate and the second coordinate can be input by the user, Or the user moves a pointer displayed on the display area to the positions of the first coordinate and the second coordinate in sequence to obtain a range or area of a coordinate.

The acquisition of the above-mentioned first coordinates and second coordinates can be regarded as marking a range of the display area, or can be regarded as obtaining the first coordinates and the second coordinates by marking a range of the display area. For example, in the manner of marking a rectangle in the display area (as shown at 3210 in FIG. 3B ), the pointer may be first controlled to mark at the first coordinate 3110, and then, while moving the pointer, a rectangle with the number 3110 is displayed in the display area. A rectangular frame line 3210 whose two ends are diagonal to the coordinates and the position of the pointer is used to display the marked range. Alternatively, the pointer is directly controlled to successively calibrate the first coordinate 3110 and the second coordinate 3120 to generate a rectangular frame line 3210 with the two coordinates as opposite corners to display the marked range. Likewise, the marked range is not limited to a rectangle, but can be a circle (generated by using the first coordinate and the second coordinate as the diameter), an ellipse (the first coordinate and the second coordinate are used as the major axis or the short axis of the ellipse). Axes are generated according to the aspect ratio of the display area).

Next, in step 330, the display scale and position reference are calculated according to the range defined by the first coordinate 3110 and the second coordinate 3120, wherein the position reference can be one of the first coordinate 3110 and the second coordinate 3120 or The center point 3130 (as shown in FIG. 3B ) of the range defined by the two is obtained. The display scale can be obtained according to the ratio of the vertical width of the display area to the vertical distance between the first coordinate and the second coordinate, or according to the horizontal width of the display area relative to the horizontal distance between the first coordinate and the second coordinate. The ratio of the distance is obtained.

Finally, as described in step 240 , the display image is directly regenerated from the image data according to the display scale and position reference. Since the details are the same as those in the previous embodiment, details will not be repeated here.

According to the above method, another specific embodiment of the present invention provides a system for adjusting digital image display, as shown in FIG. Unit 34 and a buffer unit 35 . The image memory unit 31 is used to record an image data 312. The image data 312 is generated by the image processing unit 33 according to the image data 312 according to the above step 210, and the image is delivered to the display unit 34 for display, wherein the generated The image can be stored in a buffer unit 35 , so the buffer unit 35 can include an image buffer (buffer) to store the image for display by the display unit 34 .

In addition, the image processing unit 33 further includes adding a pointer 352 in the image, the position of the pointer 352 can correspond to a coordinate position, and the data of this coordinate can be stored in the buffer unit 35, and at the same time, the interface unit 32 can be used to change this position. coordinates to control the position of the pointer 352, wherein the coordinates can be defined as the position where the pointer 352 is displayed in the display area 342, or the position where the pointer 352 is displayed in the display area 342 in the image data 312 (such as the position of the pointer 352 in the image data 312 A certain pixel position, which is displayed at the position where the pointer 352 is located).

In addition, the interface unit 32 can be used to generate a position reference 354 and a display scale 356 according to the above steps 220 and 230. The position reference 354 is a specific position in the image data 312, and the way of obtaining it can be input by the user. Coordinates or when the pointer 352 is moved to a specific position is obtained according to the pointer coordinates 352 or other methods of using coordinates to obtain a specific position in the image data 312, wherein the position reference 354 and the display scale 356 can be stored in the buffer unit 35, Therefore, the buffer unit 35 may include several buffers for storing the aforementioned pointer coordinates 352 , position reference 354 and display scale 356 .

Moreover, the interface unit 32 can further obtain a first coordinate 3110 and a second coordinate 3120 according to the above steps 320 and 330, and obtain the position reference 354 and the display scale 356 according to these two coordinates. Therefore, an option is provided in the interface unit 32 to select the way to obtain the display scale 356, such as input by the user, or obtain from a set of preset display scales 356, or according to the first coordinate and The second coordinate is obtained. Accordingly, the image processing unit 33 can regenerate the image data 312 to be displayed on the display area 342 according to the display scale 356 and the position reference 354 according to the above step 240 . Other details of this embodiment have been mentioned in the foregoing embodiments, and will not be repeated here.

The present invention can be applied to a system with positioning and display capabilities. Whether the pointer can be displayed is not a necessary condition of the present invention. For example, it is applied to a system with a touch screen. The above-mentioned position reference or coordinates can be obtained when the screen is touched. In such systems, the pointer may or may not be displayed on the screen. In addition, the present invention can be applied to portable devices such as digital cameras or mobile phones.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention; at the same time, the above description should be clear and implementable for those who are familiar with the technical field, so others do not depart from the disclosure of the present invention. Equivalent changes or modifications made under the spirit of the claims should be included in the scope of the claims.

Claims (16)

1. A method for adjusting digital image display with a single coordinate, characterized in that it comprises: displaying an image in a display area, the image is displayed according to an image data; Obtaining a position reference of the image data through a cursor, the position reference is obtained at a coordinate of the image data relative to the display area; Obtaining the display ratio by selecting one of a plurality of preset display ratios; and A redisplayed image is generated in the display area according to the display ratio and the position reference of the image data. 2. The method for adjusting digital image display with a single coordinate as claimed in claim 1, wherein the above-mentioned coordinates are obtained by moving a pointer displayed on the display area to the coordinates, and then obtaining the coordinates where the pointer is located, And the display ratio is obtained by selecting one of several preset display ratios. 3. The method for adjusting digital image display with a single coordinate as claimed in claim 1, wherein the above-mentioned re-displayed image is positioned at a specific position of the display area based on the position reference and displayed on the display according to the display ratio The region regenerates. 4. The method for adjusting digital image display with a single coordinate as claimed in claim 1, wherein when obtaining a position reference of the image data, a center position coordinate of the display area is further simultaneously obtained, and the redisplayed image Based on the location reference, the central position coordinates are regenerated in the center of the display area according to the display scale. 5. A method for adjusting digital image display with several coordinates, characterized in that it comprises: displaying an image in a display area, the image is displayed according to an image data; Obtain a first coordinate of the image data through a cursor; obtain a second coordinate of the image data through the cursor; obtaining a position reference of a redisplayed image corresponding to the first coordinate and the second coordinate according to the first coordinate and the second coordinate; Obtaining the display ratio by selecting one of a plurality of preset display ratios; and The redisplayed image is redisplayed in the display area according to the display ratio and the position reference. 6. The method for adjusting digital image display with several coordinates as claimed in claim 5, wherein the above-mentioned first coordinate and the second coordinate are obtained by moving a pointer displayed in the display area to the first coordinate respectively When the second coordinate is used, it is obtained according to the coordinate corresponding to the position of the pointer. 7. The method for adjusting digital image display with several coordinates as claimed in claim 5, wherein the above-mentioned display ratio is selected from one of the following two modes: the vertical width of the display area relative to the first coordinate and obtained by the ratio of the vertical distance between the second coordinates; and obtained by the ratio of the horizontal width of the display area relative to the horizontal distance between the first coordinate and the second coordinate. 8. The method for adjusting digital image display with several coordinates as claimed in claim 5, wherein the above-mentioned position reference is a central point between the first coordinate and the second coordinate position as the position reference, And based on the position reference and the central position coordinates of the display area, the redisplay image is displayed in the center of the display area. 9. The method for adjusting digital image display with several coordinates as claimed in claim 5, wherein said display area includes four corners of upper left corner, upper right corner, lower left corner and lower right corner, and the image data is based on the The first coordinate is the position reference. After the scale is adjusted according to the display scale, the position reference is used to select one of the four corners of the display area to be regenerated according to the display scale. 10. The method for adjusting digital image display by several coordinates as claimed in claim 5, wherein the size of the redisplayed image matches the display area. 11. A system for adjusting digital image display, characterized in that it comprises: an image storage unit for storing an image data; an interface unit, which obtains a position reference through a cursor, and obtains the display scale by selecting one of a plurality of preset display scales, wherein the position reference is a specific position in the image data; an image processing unit, used to generate the image displayed on the display area according to the display ratio and the position reference; and A display unit is used for displaying the image in a display area. 12. The system for adjusting digital image display as claimed in claim 11, further comprising a buffer unit for storing the position reference, the display scale and the image. 13. The system for adjusting digital image display as claimed in claim 11, wherein the above-mentioned interface device further comprises a pointer, and the pointer is controlled by the interface device, and the pointer is in the display area The displayed position corresponds to the coordinates of a pointer. 14. The system for adjusting digital image display as claimed in claim 11, wherein the above-mentioned position reference is obtained according to the coordinates of the pointer when the pointer is moved to a specific position, and the display ratio is obtained from the digital image by the interface device. Choose one of the preset display ratios to obtain. 15. The system for adjusting digital image display as claimed in claim 11, wherein the above-mentioned display scale is directly generated according to a first coordinate and a second coordinate in the display area, and the first coordinate and the second coordinate will be When the pointer moves to two specific positions in sequence, it is obtained according to the coordinates of the pointer, and at the same time, the center between the first coordinate and the second coordinate position is used as the position reference, and the position reference is positioned at the center of the display area to redisplay . 16. The system for adjusting digital image display as claimed in claim 11, wherein the above-mentioned display scale is selected from one of the following two modes: the vertical width of the display area relative to the first coordinate and the second coordinate obtained by the ratio of the vertical distance between the coordinates; and obtained by the ratio of the horizontal width of the display area to the horizontal distance between the first coordinate and the second coordinate.

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