JPS63675A - Stereoscopic display device - Google Patents

Abstract

PURPOSE:To reproduce an image brought to image pickup by right and left television cameras, in a state of its resolution as it is, by storing once video signals from the right and left television cameras in a frame memory, reading them out again and synthesizing them so that an interlaced scanning in which the number of scanning lines is two times can be executed,and using one which has a prescribed resolution, as for a television monitor. CONSTITUTION:Video signals (a) and (b) from a left television camera 2 and a right television camera 3 are digitized, and the video data of one frame are stored in the right and left frame memories, respectively. Subsequently, it is read out again, and the left and right video signals (a), (b) are synthesized as a video signal (c) so that the number of scanning lines becomes the interlaced scanning of about two times. At the time of synthesizing them, the image signal (a) and (b) are allocated to each field of the video signal (c), respectively. In such a way, comparing with a conventional display, an interlaced scanning in which the number of scanning lines is about two times is executed, therefore, a reproduced image can obtain a resolution being equal to one brought to image pickup by a television camera.

Description

[Detailed Description of the Invention] [Industrial Application Field J This invention is a three-dimensional display device in which two video signals are combined into one video signal, so that one scanning line is approximately two times the number of scanning lines.
By combining to double.

This invention relates to improvement of a stereoscopic display device that reproduces stereoscopic images with good image quality.

[Branch tree technology]

FIG. 4 is a diagram showing the principle of stereoscopic display with zero binocular parallax. In the figure, (1) is the object, (2) is the left TV camera corresponding to the left eye, (3) is the right TV camera corresponding to the right eye, and (4) is the above left TV camera + 2) and right TV camera (3). ), a television monitor that displays images captured by
(5) is a pair of glasses with shutters that open and close left and right visual fields, and (6) is an image taken by the right television camera (3).

(7) is an image captured by the left television camera +2), and (8) is a reproduced three-dimensional image. Further, FIG. 5 is a diagram showing the configuration of a stereoscopic display device applying the principle shown in FIG. 4 above. In FIG. 2, fi+, 12+, +31.1
41 and (5) are the same as in FIG. 4, and (9) is a video synthesizer α that combines two video signals from the left TV camera (2) and right TV camera (3) into one video signal. [
opens and closes the left and right shutters of the glasses (5) in synchronization with the timing of displaying images (7) and (6) captured by the left TV camera (2) and right TV camera (3) on the TV monitor (4). The shutter drive circuit that generates signals, αυ, is a synchronization signal generator that generates signals to synchronize the imaging timing of the left TV camera (2) and right TV camera (3), the synthesis of video signals, and the opening and closing of the shutters of the glasses. be.

Figure 6 shows a conventional image synthesizer (9) in a stereoscopic display device.
) is a diagram showing the configuration of. In the figure, a is the video signal from the left TV camera (2), and b is the video signal from the right TV camera (3;
C is the combined video signal.

d is a timing signal for combining the left and right video signals a and b. Figure 7 shows the video synthesizer (
9) is a diagram showing the operation timing of item 9).

In the figure, a, b, c and d are the same as in Figure 6,
0 is the ODD field of the video signal, E is the EV of the video signal
In the EN field, tl indicates the field period, and t2 indicates the frame period.

In the stereoscopic display device shown in FIGS. 4 and 5.

A conventional video synthesizer (91) utilizes interlaced scanning of a television monitor (4), as shown in FIGS. 6 and 7.

For example, when the television monitor (4) is scanning the ODD field, the image (7) of the left television camera (2) is displayed and the right shutter of the glasses (5) is closed.

When scanning the EVEN field, the image (6) of the right TV camera (3) is displayed and the left shutter of the glasses (5) is closed. In this way, three-dimensional images are reproduced by viewing the left and right images alternately with the left and right eyes.

[Problem that the invention seeks to solve]

In the conventional video synthesizer (9) as described above, the left and right videos (7 ) and (6) are synthesized. Therefore, the reproduced image is of poor quality because the resolution is halved.

There was a problem that the display was rough.

The present invention was made to solve this problem, and reproduces a three-dimensional image without impairing the resolution of the imaged video signal.

[Means for solving problems]

The video synthesizer 191 according to the present invention has a left television camera (
The video signal a from [2] and the video signal from the right TV camera (31) are each stored twice in the frame memory,
Read out the left and right video signals a and b again.

Combined so that the number of scanning lines is approximately twice as high as interlaced scanning.

The above problem can be solved by using a television monitor (4) having a predetermined resolution.

[For production]

In the third aspect of the present invention, the video signals a and b from the left TV camera (2) and the right TV camera (31) are digitized, one frame of video data is stored in each of the left and right frame memories, and then read out again. The left and right video signals a and b are combined to provide interlaced scanning with approximately twice the number of scanning lines, resulting in video signal C. At the time of this combination, video signals a and b are assigned to each field of video signal C, respectively. This results in interlaced scanning, which has about twice the number of scanning lines compared to conventional display, so the reproduced image has a resolution equivalent to that captured by a television camera.

[Actual bag example]

FIG. 1 shows a practical example of an image synthesizer (91) according to the present invention in the stereoscopic display device shown in FIGS. 4 and 5. In the figure, a, b, c, and d are It is the same as FIG. 6 and FIG. 1, and (]2 is the left frame memory that stores the video signal a from the left TV camera (2), and α3 stores the video signal a from the right TV camera (3). Right frame memo! 1. Q41 is a synthesis circuit that switches the video signals read from the left frame memory a3 and the right frame memory [13 field by field and synthesizes them into one video signal, (I119 is the left and right video signals a and b) This is a timing control circuit that controls the timing for synthesizing the video signal C to produce the video signal C.

FIG. 2 is a diagram showing the operation timing of the video synthesizer (91) in FIG. 1. In the figure, a, b.

c, d, O, E, tl and t2 are the same as in FIG.

The operation of the video synthesizer (91) configured as shown in FIG. Field frequency 60Hz, frame frequency 30 [
(This is a signal for interlaced scanning of z.

The video signal C to be synthesized has at least 105 scanning lines.
If the number is 0 or more, it is a signal for interlaced scanning with a field frequency of 60H2l and a frame frequency of 30Hz.

Therefore, t shown in Figure 2 is 16.7m9!1c, t
2 is 33.3m9Bcte. Left frame memory σ2
, the video data of the ODD field of the video signal a is stored at the first tl time, and the video data of the ODD field of the video signal a is stored at the ninth tl time.
Video data of the VEN field is stored. Similarly, data of one frame of the video signal is stored in the right frame memory q3. When the video signal C is an ODD field, the video data stored in the left frame memory (I3) is sequentially read out and used as the video signal of the ODD field of the video signal C. Similarly.

In the case of an EVEN field, the video data stored in the right frame memory αJ is read out and used as a video signal of the EVEN field. The video signal C thus synthesized is displayed on a television monitor (4) having a predetermined resolution.

Also, the shutters of glasses.

The left and right shutters are opened and closed for each field in synchronization with the timing signal d shown in FIG. FIG. 3 is a diagram showing scanning lines on the left and right television cameras and the television monitor. In Figure 2, (L) and [R1 are the scanning lines of the left TV camera (2) and right TV camera (3), respectively, and (L+R) is the TV monitor (4) in this practical example.
shows the scan line of .

〔Effect of the invention〕

As described above, according to the present invention, when the left and right video signals a and b are combined and displayed, the resolution is not reduced.
, it is possible to reproduce the images with the same resolution as those captured by the left and right television cameras (2) and (3).

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a video synthesizer showing an embodiment of the invention, FIG. 2 is a diagram showing the timing of video signal synthesis in an embodiment of the invention, and FIG. 3 is a diagram showing the timing of video signal synthesis in an embodiment of the invention. FIG. 7 is a diagram showing scanning lines in Example 2. FIG. 4 is a diagram showing the principle of stereoscopic display using single binocular parallax, FIG. 5 is a block diagram of a stereoscopic display device, and FIG. 6 is a diagram showing the configuration of a stereoscopic display device. FIG. T, which is a diagram showing the implementation of a conventional video synthesizer, is a diagram showing the timing of conventional video signal synthesis. In the figure, (l) is the object, and L21 is the left television camera. (31 is the right TV camera, (4) is the TV monitor, (5
) is the glasses, (9) is the video synthesizer, and σ2 is the left frame memory. 13 is a right frame memory, α knob is a synthesis circuit, and α9 is a timing control circuit. It should be noted that the same or corresponding parts in FIG. 1 are denoted by the same reference numerals.

Claims (1)

[Claims] two television cameras that image an object; a video synthesizer that combines video signals from the two television cameras;
Binoculars consisting of a television monitor that displays images synthesized by the image synthesizer, and glasses that have shutters that open and close the left and right visual fields in synchronization with the display of the synthesized video signals. In a stereoscopic display device that applies the principle of parallax, in order to synthesize the two video signals obtained from the television camera, the left and right video signals are passed through a frame memory, and the combined video signal is A video synthesizer whose number of scanning lines is approximately twice that of a video signal captured by a television camera, and a television monitor which displays one screen with approximately twice the number of scanning lines of a television camera. A stereoscopic display device comprising: