KR20110045654A - Crosstalk user tracking stereoscopic display device and method - Google Patents

Abstract

A user tracking stereoscopic display device and method without crosstalk are disclosed. The user tracking stereoscopic display apparatus without crosstalk may provide a crosstalk reduction apparatus that recognizes a user's position, rotates the display apparatus according to the user's position, and implements a stereoscopic image through subpixel rendering.

Description

Stereoscopic display device and method for user tracking without crosstalk {APPARATUS AND METHOD FOR CROSSTALK-FREE USER TRACKING THREE DIMENSIONAL DISPLAY}

Embodiments of the present invention relate to a user tracking stereoscopic display device and method without crosstalk, and more particularly, to a technique for displaying a stereoscopic image without crosstalk using a simple display device structure and a user tracking device.

When displaying different images on the display device, interference occurs between the images. That is, in the display device, unwanted crosstalk occurs between images, thereby degrading viewing quality of stereoscopic images and acting as an important factor for generating stereoscopic viewing fatigue.

Meanwhile, a method using a lenticular lens among three-dimensional image display methods detects a user's position through user tracking and physically moves the lenticular lens according to the user's position to display a stereoscopic image corresponding to the user's position. Can be implemented. This approach requires a complex system because of the fast positioning of the viewer and the physical movement of the lenticular lens.

Accordingly, there is a need for a research and a method for a crosstalk-free stereoscopic display apparatus having a wide 3D viewing area using a slim display structure and a simple user tracking device without physically moving the lenticular lens.

According to an embodiment of the present invention, a user tracking stereoscopic display apparatus includes a user tracking unit recognizing a user's position, a display unit rotating according to the user's position, and a subpixel rendering by performing subpixel rendering It may include wealth.

In this case, the user tracking unit may recognize the head position of the user.

The user tracking unit may recognize a user location using at least one of a camera, an infrared sensor, and a user recognition algorithm.

In addition, the input image generation unit, the display unit may implement a stereoscopic image using a lenticular lens and a flat panel display.

The display unit may implement a motion parallax by outputting a different image according to a direction when the number of viewpoints of the input multiview image exceeds a preset number of viewpoints. .

The subpixel rendering unit may limit the fixed viewing angle to the width of the shoulder width of the user to perform subpixel rendering.

According to another exemplary embodiment of the present invention, a user tracking stereoscopic display apparatus includes a view number determiner that checks the number of views of an input multiview image and a same image or different images when the display panel is rotated according to the number of views of the multiview image. It may include an output unit for displaying.

In this case, when the number of viewpoints of the multi-view image is less than or equal to a predetermined number of viewpoints, the output unit outputs the same image when the display panel is rotated according to the position of the user, and when the number of viewpoints of the multi-view image is greater than the predetermined number of viewpoints, When the display panel is rotated according to the position of the user, motion parallax may be realized by outputting different images according to the direction.

According to an embodiment of the present invention, there is provided a method for tracking a user stereoscopic display, including: recognizing a location of a user, rotating a display device according to the location of the user, and performing subpixel rendering to implement a stereoscopic image. It may include.

According to another aspect of the present invention, there is provided a user tracking stereoscopic display method, comprising: checking the number of viewpoints of an inputted multiview image and displaying the same image or different images when the display panel is rotated according to the number of viewpoints of the multiview image It may include a step.

In this case, in the displaying, when the number of viewpoints of the multi-view image is less than or equal to a predetermined number of viewpoints, the same image is output when the display panel is rotated according to the position of the user, and the number of viewpoints of the multi-view image is larger than the preset number of viewpoints. In this case, when the display panel is rotated according to the position of the user, the motion parallax may be implemented by outputting different images according to the direction.

According to an embodiment of the present invention, by rotating the display itself without physically moving the lenticular lens according to the user position, there is provided a user tracking stereoscopic display device and method for securing a wide viewing area in the horizontal direction using a simple system can do.

According to an embodiment of the present invention, a user tracking stereoscopic display apparatus and method for securing a wide viewing area in the vertical direction by implementing a stereoscopic image through sub-pixel rendering without physically moving a lenticular lens according to a user's position Can be provided.

Hereinafter, with reference to the contents described in the accompanying drawings will be described in detail the embodiments of the present invention. However, the present invention is not limited to or limited by the embodiments. Like reference numerals in the drawings denote like elements.

1 is a block diagram of a user tracking stereoscopic display device according to an embodiment of the present invention.

Referring to FIG. 1, the user tracking stereoscopic display apparatus 100 may include a user tracking unit 110, a display unit 120, and a sub pixel rendering unit 130.

The user tracker 110 may recognize the location of the user. Here, at least one of a camera, an infrared sensor, and a user recognition algorithm may be used for user recognition. In addition, the user tracking unit 110 may recognize the location of the user by recognizing the location of the user's head. That is, the position of the head may be recognized as the position of the user, rather than the position of the head in detail like the position of the pupil. In addition, the position of the user may be recognized by not only being limited to the position of the user's head but also by those skilled in the art.

The display 120 may rotate according to the position of the user. That is, according to the position of the user, the lenticular lens may not physically move left and right, but the display itself may rotate to output an image with respect to the user position. In this case, the display 120 may implement a stereoscopic image using a lenticular lens and a flat panel display.

In addition, when the number of viewpoints of the input multiview image exceeds a preset number of viewpoints, the display 120 may output a different image according to a direction when the rotation is performed according to the position of the user to implement motion parallax. Can be.

The subpixel rendering unit 130 may implement a 3D image by performing subpixel rendering. In this case, the subpixel rendering unit 130 may perform subpixel rendering by limiting the fixed viewing angle to the width of the shoulder width of the user. Therefore, by performing the subpixel rendering, the viewing distance can be enlarged in the vertical direction with the display device.

As described above, by recognizing the position of the user and rotating the display itself according to the user position, it is possible to secure a wide viewing area in the horizontal direction even with a simple system that is not complicated.

In addition, by performing sub-pixel rendering without physically moving the lenticular lens, a wide viewing distance can be ensured even in the vertical direction.

2 is a diagram for describing a process of implementing a stereoscopic image for each part of the apparatus, according to an exemplary embodiment.

Referring to FIG. 2, the location of the user 211 may be recognized by the user tracking device 210 located at one side of the display device. Here, the user tracking device 210 may use a camera, an IR sensor, or the like. When the position of the user is recognized, the display device itself may be rotated according to the position of the user to secure a wide viewing area in the horizontal direction.

In addition, the display device may include a display panel 220 and a lenticular lens 221 to implement a 3D stereoscopic image. Here, the wide viewing area can be secured by moving the display device itself without moving the lenticular lens from side to side or back and forth. In order to secure the viewing area in the vertical direction, the subpixel rendering unit 230 may render an image in subpixel units.

3 is a diagram for describing a viewing area in a horizontal direction according to one embodiment of the present invention.

Referring to FIG. 3, an area where a stereoscopic image can be viewed using a display device may be determined as a limited area. That is, the stereoscopic image can be viewed only within the constant audio visual angle 310 in the horizontal direction. Therefore, in order to move the lenticular lens in the horizontal direction to secure a wider viewing area in the horizontal direction, a complicated and detailed system is required. Therefore, when the display device itself is rotated without moving the lenticular lens, the horizontal direction is achieved through a simple system. A wide range of viewing areas can be secured.

4 is a view for explaining a viewing area in the vertical direction according to an embodiment of the present invention.

Referring to FIG. 4, an area where a stereoscopic image can be viewed using the display device may be determined as a limited area even in the vertical direction. That is, the 3D stereoscopic image may be viewed only within a certain distance 410 from the display device. Therefore, if you want to move the lenticular lens in the vertical direction to secure a wider viewing area in the vertical direction, as mentioned above, a complicated and detailed system is required. Therefore, performing subpixel rendering without moving the lenticular lens is simple. The system also ensures a wide viewing range even in the vertical direction.

Here, the sub-pixel rendering method represents a viewpoint image as one sub-pixel, and one viewpoint image is composed of one color of R, G, and B, and full color can be realized using neighboring viewpoint images. In addition, since many viewpoint images are represented in the angle of view as compared with pixel rendering, the distance between viewpoint images within the viewing area is short, so that continuous and smooth viewpoint images can be expressed, and thus, in the horizontal and vertical directions. The viewing area can be enlarged.

That is, the number of viewpoints is increased through sub-pixel rendering within the same audio visual angle, and a smooth view image can be realized without a user's horizontal and vertical movement.

5 is a diagram for describing a vertical viewing distance required in a mobile device according to one embodiment of the present invention.

Referring to FIG. 5, when using a mobile device, the required vertical 3D viewing range may be related to the arm length 510 of the user. That is, assuming that the arm length is approximately 100 cm, and the explicit distance 520 of the 3D stereoscopic image is approximately 25 cm, the required vertical viewing distance 530 does not deviate greatly between 25 and 100 cm. Accordingly, in the case of a mobile device, the viewing distance in the vertical direction may be satisfied by implementing a super multi-view by sub-pixel rendering.

6 is a block diagram of a user tracking stereoscopic display device according to another embodiment of the present invention.

Referring to FIG. 6, the user tracking stereoscopic display apparatus 600 may include a viewpoint number determiner 610 and an output unit 620.

The view point determiner 610 may check the view point number of the input multiview image. That is, it may be determined whether the number of viewpoints of the multi-view image is greater than the preset number of viewpoints.

The output unit 620 may display the same image or different images when the display panel rotates according to the number of viewpoints of the multiview image. In this case, when the number of viewpoints of the multi-view image is less than or equal to a predetermined number of viewpoints, the same image is output when the display panel is rotated according to the position of the user, and when the number of viewpoints of the multi-view image is larger than the preset number of viewpoints, According to the rotation of the display panel, a motion parallax may be realized by outputting a different image according to a direction.

For example, when an image having a smaller number or the same number of viewpoints is input as compared to a display device using a predesigned lenticular lens, a 3D stereoscopic image identical to the number of viewpoints input when the display apparatus is rotated may be implemented. That is, the same stereoscopic image may be represented without changing the stereoscopic image according to the direction when the display device is rotated.

On the other hand, when a large number of viewpoints are input as compared to a display device using a pre-designed lenticular lens, a stereoscopic image of another viewpoint may be expressed through the display apparatus when the display apparatus is rotated. That is, motion parallax may be implemented when the display device is rotated, and in this case, 360 degree full motion parallax may also be implemented.

7 is an operation flowchart of a user tracking stereoscopic display method according to an embodiment of the present invention.

Referring to FIG. 7, in operation 710, a location of a user may be recognized. Here, in step 710, the location of the user may be recognized by recognizing the location of the user's head. In addition, the position of the user may be recognized by recognizing not only the position of the user's head but also other parts that can be easily derived by those skilled in the art.

In operation 720, the display apparatus may be rotated according to the position of the user. Therefore, even without a separate system for moving the lenticular lens, it is possible to secure a wide viewing area in the horizontal direction by rotating the display device itself through a simple device. In this case, in operation 720, when the number of viewpoints of the input multiview image exceeds a preset number of viewpoints, a motion parallax may be realized by outputting a different image according to a direction when rotating according to the position of the user.

In operation 730, a three-dimensional image may be implemented by performing subpixel rendering. Therefore, a wide viewing area can be secured in the vertical direction through sub pixel rendering. In this case, in step 730, the sub-pixel rendering may be performed by limiting the fixed viewing angle to the width of the shoulder width of the user. In other words, by implementing a super multi-view image by limiting the fixed viewing angle to the width of the shoulder width of the user, a wider viewing area can be secured in the vertical direction (Z-axis direction).

8 is an operation flowchart of a user tracking stereoscopic display method according to another embodiment of the present invention.

Referring to FIG. 8, in operation 810, the number of viewpoints of an input multiview image may be checked. In this case, it may be determined whether the number of viewpoints of the multiview image is greater than the preset number of viewpoints.

In operation 820, when the number of viewpoints of the multi-view image is less than or equal to a predetermined number of viewpoints, the same image may be output when the display panel is rotated according to the position of the user.

In operation 830, when the number of viewpoints of the multi-view image is larger than a preset number of viewpoints, the motion parallax may be implemented by outputting different images according to a direction when the display panel rotates according to the position of the user. In this case, 360-degree full motion parallax may be possible.

Meanwhile, for the parts not described in FIGS. 7 to 8, the description of FIGS. 1 to 6 may be referred to.

As described above, by rotating the display itself without physically moving the lenticular lens according to the user position, it is possible to secure a wide viewing area in the horizontal direction using a simple system.

In addition, by implementing a stereoscopic image through the sub-pixel rendering, it is possible to provide a user tracking stereoscopic display apparatus and method that can secure a wide viewing area in the vertical direction.

In addition, a 3D stereoscopic image without crosstalk having a wide 3D viewing area can be realized by using a slim structure of a flat panel display and a simple user tracking device.

The user tracking stereoscopic display method according to an embodiment of the present invention may be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

Although one embodiment of the present invention as described above has been described by a limited embodiment and drawings, one embodiment of the present invention is not limited to the above-described embodiment, which is a general knowledge in the field of the present invention Those having a variety of modifications and variations are possible from these descriptions. Accordingly, one embodiment of the invention should be understood only by the claims set forth below, all equivalent or equivalent modifications will be within the scope of the invention idea.

1 is a block diagram of a user tracking stereoscopic display device according to an embodiment of the present invention.

2 is a diagram for describing a process of implementing a stereoscopic image for each part of the apparatus, according to an exemplary embodiment.

3 is a diagram for describing a viewing area in a horizontal direction according to one embodiment of the present invention.

4 is a view for explaining a viewing area in the vertical direction according to an embodiment of the present invention.

5 is a diagram for describing a vertical viewing distance required in a mobile device according to one embodiment of the present invention.

6 is a block diagram of a user tracking stereoscopic display device according to another embodiment of the present invention.

7 is an operation flowchart of a user tracking stereoscopic display method according to an embodiment of the present invention.

8 is an operation flowchart of a user tracking stereoscopic display method according to another embodiment of the present invention.

Claims (17)

A user tracker recognizing a user's location; A display unit rotating according to the position of the user; And Sub-pixel rendering unit that implements three-dimensional image by performing sub-pixel rendering The user tracking stereoscopic display device comprising a. The method of claim 1, The user tracking unit, And a user's head position recognizing position. The method of claim 1, The user tracking unit, A user tracking stereoscopic display device, wherein the user location is recognized using at least one of a camera, an infrared sensor, and a user recognition algorithm. The method of claim 1, The display unit, A user tracking stereoscopic display apparatus, which realizes a stereoscopic image using a lenticular lens and a flat panel display. The method of claim 1, The display unit, When the number of viewpoints of the inputted multi-view image exceeds the predetermined number of viewpoints, when the user rotates in accordance with the user's position, outputs a different image according to the direction to implement a motion parallax characterized in that to implement a motion parallax Display device. The method of claim 1, The sub pixel rendering unit, And sub-pixel rendering by limiting the fixed viewing angle to the width of the shoulder width of the user. A view point determination unit to check a view point number of an input multiview image; And An output unit for displaying the same image or different images when the display panel rotates according to the number of viewpoints of the multi-view image User tracking stereoscopic display device comprising a. The method of claim 7, wherein The output unit, When the number of viewpoints of the multiview image is equal to or less than a predetermined number of viewpoints, Output the same image when rotating the display panel according to the user's location, When the number of viewpoints of the multi-view image is larger than a preset number of viewpoints, When the display panel is rotated according to the position of the user, the user tracking stereoscopic display device, characterized in that to implement a motion parallax by outputting a different image according to the direction. Recognizing a location of a user; Rotating the display device according to the position of the user; And Implementing stereoscopic image by performing sub pixel rendering User tracking stereoscopic display method comprising a. 10. The method of claim 9, Recognizing the location of the user, The user tracking stereoscopic display method, characterized in that for recognizing the position of the user's head. 10. The method of claim 9, Recognizing the location of the user, A user tracking stereoscopic display method, wherein the user position is recognized using at least one of a camera, an infrared sensor, and a user recognition algorithm. 10. The method of claim 9, The rotating step, A user tracking stereoscopic display method comprising rotating a display device for implementing a stereoscopic image using a lenticular lens and a flat panel display. 10. The method of claim 9, The rotating step, When the number of viewpoints of the inputted multi-view image exceeds the predetermined number of viewpoints, when the user rotates in accordance with the user's position, outputs a different image according to the direction to implement a motion parallax characterized in that to implement a motion parallax Display method. 10. The method of claim 9, The step of implementing the stereoscopic image, And sub-pixel rendering by limiting the fixed viewing angle to the width of the shoulder width of the user. Checking the number of viewpoints of an input multiview image; And Displaying the same image or different images when the display panel is rotated according to the number of viewpoints of the multi-view image User tracking stereoscopic display method comprising a. The method of claim 15, The displaying step, When the number of viewpoints of the multiview image is equal to or less than a predetermined number of viewpoints, Output the same image when rotating the display panel according to the user's location, When the number of viewpoints of the multi-view image is larger than a preset number of viewpoints, When the display panel is rotated according to a user's position, a motion parallax is implemented by outputting a different image according to a direction. A computer-readable recording medium in which a program for executing the method of any one of claims 9 to 16 is recorded.

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