KR0171131B1 - The masking method of an image signal - Google Patents

Abstract

The present invention relates to a method of masking an image signal for a stereoscopic image, comprising the steps of: capturing a predetermined object for left and right vision using the first and second imaging elements, respectively; The first video signal captured by the first image pickup device and the second video signal for right vision are respectively divided into a predetermined number of pixel columns and masked, respectively, wherein the first video signal is positioned on the leftmost side of the screen, and the second image signal is masked. Masking the video signal so as to be positioned at left and right sides of the screen; Synthesizing a masked first video signal and a second video signal; Displaying the synthesized video signal.

Description

Masking method of video signal

1 is a schematic block diagram of hardware for executing a method of masking a video signal according to the present invention.

2 is a diagram for explaining a method of masking an image signal according to a preferred embodiment of the present invention.

3 is a diagram for explaining a method of masking an image signal according to a conventional method.

* Explanation of symbols for main parts of the drawings

120, 140: camera 220, 240: A / D converter

320, 340: masking part 400: mixing treatment part

600: D / A converter

The present invention relates to a method of masking a video signal, and more particularly, to an improved masking method of a video signal for differentially masking a video signal according to a left time and a right time for generating a stereoscopic image.

Recently, hardware for processing image signals has been rapidly developed to enable real-time processing of stereoscopic image signals, and is used in various fields such as molecular structure modeling, photogrammetry, simulation flight devices, CAD, multi-dimensional data visualization and virtual reality. Research on the display technology of the three-dimensional image signal is continuing.

On the other hand, human vision senses the three-dimensional effect by distinguishing the relative positions of objects, and uses some depth information as a method for obtaining the three-dimensional feeling. Generally, the depth information is a physiological depth information and a psychological depth. There is information.

First, the physiological depth information is based on the ACCOMODATION by looking at the perspective of the object by changing the focal length of the lens, and the convergence by rotating inward so that the eye is attracted to the object when the object approaches the observer. ), BINOCULAR DISPARITY using the difference between the image projected on the left eye and the right eye, and motion parallax using the difference in the viewpoint of the scene as the scene or observer moves.

Second, psychological depth information is a linear perspective method in which the size of an image on the human retina is inversely proportional to the change in distance between the object and the eye, and the shape and depth relationship of the object is determined from the position of the object with respect to the light source. SHADING AND SHADOWING to make decisions, AERIAL PERSPECTIVE to make distant objects appear more blurry, and INTERPOSITION when one object is covered or superimposed on another.

The three-dimensional image display using the depth information as described above, the holographic (HOLOGRAPHIC), the multi-plane display, and the disparity characteristics of the two eyes to produce a 'real and' stereoscopic 'image within the range that the physiological depth information is matched The stereo pair technique can be divided into three categories. Here, the stereo pair technique includes a time-parallel technique that provides a video signal for two eyes' visions, a left eye image and a right eye image. There is a FIELD SEQUENCE technique that provides sequentially.

On the other hand, the time-parallel technique uses a vertical line or parallax barrier to block the image of the other eye from one eye, and masks the image signal for the left eye and the image signal for the right eye, respectively, and then synthesizes the stereoscopic image. Displaying a signal, and the present invention is substantially related to the masking technique of such a video signal.

3 is a diagram for explaining a conventional method of masking a video signal.

In order to form a stereoscopic image signal, masking is required for separating the first image signal and the second image signal of a subject photographed through the first camera and the second camera, respectively, into left and right image signals. Hereinafter, a conventional method of masking the first and second video signals will be described.

The first video signal is composed of a predetermined number of pixels, and the pixels are configured in the row and column directions. As shown in FIG. 3A, the pixels are divided into a predetermined number of columns in the vertical direction. do. Then, these columns are divided into odd-numbered columns (columns hatched in Fig. 3A) and even-numbered columns from the left side, and the video signals of the odd-numbered columns are masked as the left video signal.

The second image signal is also masked in the same manner. That is, the second video signal is also composed of a predetermined number of pixels, and the pixels are configured in the row and column directions. As shown in FIG. 3B, the pixels are arranged in a predetermined number of columns in the vertical direction. Divide into Then, these columns are divided into columns of odd-numbered and even-numbered regions (shown in FIG. 3 (b)) from the left side, and the video signals of the even-numbered columns are masked by the right video signal.

The first and second video signals masked in the manners of FIGS. 3A and 3B are mixed together to form a 3D video signal, and the 3D video signal is displayed on a display device, thereby allowing a viewer to display a 3D image. You can watch it.

However, as described above, the image signal for the subject is simultaneously captured by the first camera and the second camera, and then divided equally into a predetermined number of pixel columns, so that the first image signal is divided into odd pixel columns for the left eye. The conventional method of masking and masking the second video signal with even-numbered pixel columns for the right eye has a problem in that an effective stereoscopic video signal cannot be formed. That is, when looking at the object, the three-dimensional effect of the object is generated differently from the center of the focused object toward the left and right by the distance and the angle difference between the left and right eyes, but by the conventional masking method There is a problem that is not expressed.

Therefore, the present inventors divide a video signal based on the center of the first video signal and the second video signal for a subject, and then mask the video signal for the left eye and the video signal for the right eye. It was conceived that the image could be displayed.

The present invention has been made in view of this point, and an object of the present invention is to divide the video signal for a subject photographed simultaneously by two cameras based on the center and mask the video signal for the left and right time respectively. The present invention provides a masking method of an image signal that can effectively express a three-dimensional effect.

In order to achieve the above object, the present invention provides a method for masking an image signal photographed through a first and a second image pickup device for a stereoscopic screen, wherein the first and second image pickup devices display a predetermined object for left viewing and right side. Imaging each for visual purposes; The first video signal captured by the first image pickup device and the second video signal for right vision are respectively divided into a predetermined number of pixel columns and masked, respectively, wherein the first video signal is positioned on the leftmost side of the screen, and the second image signal is masked. Masking the video signal so as to be positioned at left and right sides of the screen; Synthesizing a masked first video signal and a second video signal; Displaying the synthesized video signal.

Other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

FIG. 1 is a schematic block diagram of hardware for implementing an improved masking method of an image signal according to the present invention. The first camera 120, the second camera 140, and the first A / D converter 220 are shown in FIG. ), A second A / D conversion unit 240, a first masking unit 320, a second masking unit 340, a mixing processing unit 400, and a D / A conversion unit 600.

The first camera 120 captures a predetermined subject and outputs a first image signal for left vision, and the second camera 140 captures a same subject and outputs a second image signal for right vision.

The first A / D converter 220 converts the first video signal captured by the first camera 120 into a digital video signal, and the second A / D converter 240 converts the second camera 140. Is converted into a digital video signal.

The first masking unit 320 evenly divides the first video signal converted into the digital video signal by the first A / D converter 220 into a predetermined number of pixel columns, based on the center of the first video signal. The left video portion of the first video signal selects and masks only the odd pixel columns from the left of the first video signal, and the right video portion of the first video signal selects only the even pixel columns from the center of the first video signal.

The second masking unit 340 equally divides the second video signal converted from the digital video signal by the second A / D converter 240 into a predetermined number of pixel columns, and divides the center of the second video signal. As a reference, the left video portion of the second video signal selects and masks only the even pixel columns from the left of the second video signal, and the right video portion of the second video signal selects only the odd pixel columns from the center of the second video signal.

In addition, the mixing processor 400 synthesizes the first video signal and the second video signal masked by the first masking unit 320 and the second masking unit 340 to form a stereoscopic video signal, and a D / A converter. 600 converts the stereoscopic image signal of the mixing processor 400 into an analog image signal.

In order to carry out the present invention, a method of masking a video signal according to the present invention will be described in more detail with reference to FIG. 1 and FIG.

First, the first video signal for the left vision captured by the first camera 120 is converted into a digital video signal by the first A / D converter 220 and then masked by the first masker 320. The second video signal for the right view captured by the second camera 140 is converted into a digital video signal by the second A / D converter 240 and then masked by the second masker 340.

Here, the masking of the first video signal and the second video signal by the first masking part 320 and the second masking part 340 will be described in more detail with reference to FIG. 2.

First, as illustrated in FIG. 2A, the first image signal is divided into a predetermined number of pixel columns set by the first masking unit 320, and the first image signal is divided based on the center C of the first image signal. The left video portion C1 of the video signal is masked with an odd pixel column from the left of the first video signal, and the right video portion C2 of the first video signal is an even pixel from the center C of the first video signal. Masked by heat.

In addition, as illustrated in FIG. 2B, the second video signal with respect to the right view time converted into the digital video signal is divided into a predetermined number (200) of pixel columns set by the second masking unit 340. The left image portion C11 of the second image signal is masked with the even-numbered pixel column from the left side of the second image signal after being divided based on the center C of the second image signal, and the right image portion of the second image signal. (C12) Masked odd-numbered pixel columns from center C of the second video signal.

Next, the first image signal and the second image signal masked by the first masking unit 320 and the second masking unit 340, respectively, are synthesized by the mixing processor 400 to form a stereoscopic image signal, and the D / A The converter 600 converts the stereoscopic video signal into an analog video signal and then provides the same to the next display apparatus.

Here, the screen by the stereoscopic video signal is a state in which the third diagrams (a) and (b) are synthesized, so that the second video signal, that is, the right visual video signal, is displayed at the center of the screen. Since the left and right eyes are in focus, they do not have a significant effect on the stereoscopic effect, but the leftmost screen of the screen has a left video signal, that is, a first video signal, and the left and right sides of the screen have a right video of the stereoscopic video signal. In other words, the second image signal is located, and in this way, the left image signal is positioned on the left side of the screen as compared to the conventional art, and the right image signal is also positioned on the right side of the screen as compared with the conventional art, so that the stereoscopic feeling can be improved.

Therefore, using the present invention, in displaying a stereoscopic image, it is possible to obtain a full three-dimensional feeling closer to the reality.

Claims (3)

A method of masking an image signal captured by a first and a second imaging device for a stereoscopic screen, the method comprising: imaging a predetermined subject for left and right viewing using the first and second imaging devices, respectively; ; The first video signal captured by the first imaging device and the second video signal for right vision are divided and masked into a predetermined number of pixel columns, respectively, and the first video signal is displayed on the leftmost side of the screen. Masking the second video signal to be positioned at left and right sides of the screen; Synthesizing the masked first and second video signals; And displaying the synthesized video signal. The display apparatus of claim 1, wherein the first video signal is divided based on the center of the first video signal, and the left video portion of the first video signal is masked from an left side of the first video signal to an odd pixel column. And a right image portion of the first image signal masks an even-numbered pixel column from a center of the first image signal. The display apparatus of claim 1, wherein the second video signal is divided based on the center of the second video signal, and the left video portion of the second video signal is masked by an even-numbered pixel column from the left of the second video signal. And a right image portion of the second image signal masks an odd-numbered pixel column from a center of the second image signal.