JPH07226958A - 3D image display system - Google Patents

Abstract

(57) [Abstract] [Purpose] To easily realize stereoscopic images using 2D image software and ordinary image display devices. [Structure] A 2D video signal from a 2D video source such as a 2D video playback device 1A or a TV signal receiving device is 2D / 3.
The D-image converter 2 converts the right-eye image signal R and the left-eye image signal L into a three-dimensional image signal, and the simultaneous / sequential signal converter 3 further converts the three-dimensional image signal into right-eye image R and left-eye image R, L. The signals are sequentially converted and supplied to ordinary video display devices 4, 5, 6 such as a television receiver,
The image displayed by this image display device is observed by the stereoscopic eyeglasses 7 which are opened and closed alternately on the right eye side and the left eye side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display system in which stereoscopic images can be easily enjoyed by using two-dimensional image software.

[0002]

2. Description of the Related Art Conventionally, in order to enjoy a three-dimensional stereoscopic image, it is necessary to input a two-dimensional stereoscopic image signal obtained by capturing an image with a dedicated stereoscopic camera or the like into a dedicated stereoscopic display device for reproduction. It was

Therefore, according to this method, it is not possible to use the existing two-dimensional video software that is widely used as video software, and it is necessary to newly produce three-dimensional video software. Since a dedicated stereoscopic image display device such as a three-dimensional display is required, there is a drawback that the entire system for reproducing stereoscopic images increases in cost.

[0004]

Therefore, according to the present invention, there is no need to newly use 3D video software, but 2D video obtained from existing video software or a normal video camera, or a normal television. An object of the present invention is to make it possible to easily enjoy a stereoscopic image without using a special stereoscopic image display device by using a two-dimensional image sent in real time by John broadcasting or CATV broadcasting.

[0005]

In the present invention, two-dimensional (2
D) The video software is converted into three-dimensional (3D) video software having a right-eye video and a left-eye video, and the right-eye video and the left-eye video of this 3D video software are input and displayed on a video display device.

[0006]

With the above structure, 2D video software is converted into 3D video software having a right-eye video and a left-eye video, and the 3D video
The video software is reproduced as a stereoscopic video by a normal video display device.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic structure of a stereoscopic image display system embodying the present invention, and 1A is a 2D image reproducing device such as a normal video tape recorder or a video disc player. 1B is a TV broadcast receiving device such as a TV tuner or a CATV tuner that receives a two-dimensional TV signal transmitted via an antenna or a cable.
The 2D video signal reproduced by the video reproducing apparatus 1A and received by the TV broadcast receiving apparatus and demodulated is switched to the next 2D by the switch 1C.
It is input to the 3D image conversion device 2.

The image conversion device 2 is a device for converting an input 2D image into a 3D image composed of a right-eye image signal R and a left-eye image signal L having a parallax with each other, the details of which will be described later. The right-eye video signal R and the left-eye video signal L are supplied to the next simultaneous / sequential signal converter 3.

The signal conversion device 3 is a device for alternately switching the right-eye video signal R and the left-eye video signal R, which are simultaneously input in parallel, at regular time intervals and outputting them serially. The right-eye video signal R and the left-eye video signal L thus reproduced are ordinary television receivers 4 using a picture tube.
It is supplied to an image display device such as the projector 5 or the small liquid crystal television 6.

More specifically, in the signal conversion device 3, the input right-eye video signal R and left-eye video signal L are both 2: 1.
In case of the interlaced format of
And B, only the right-eye video signal R is output in the odd field, and the left-eye video signal L is output in the even field.
Only the right-eye video signal R and the left-eye video signal L are alternately input to the video display device such as the television receiver 4 for each field.

Even when the right-eye video signal R and the left-eye video signal L are in the interlaced format, the signal conversion device 3 alternately outputs the right-eye video signal R and the left-eye video signal L for each frame (2 fields). You may do it. That is, in this case, the right-eye video signal R and the left-eye video signal L respectively from the odd field and the even field are alternately supplied to the video display device such as the television receiver 4 for each frame. .

Further, even when the right-eye video signal R and the left-eye video signal L are in the non-interlaced format, the right-eye video signal R and the left-eye video signal are displayed in the video display devices 4, 5 and 6 for each frame = 1 field. L is supplied. However, in any of the above cases, the right-eye video signal R and the left-eye video signal L may be alternately supplied for every plural fields or plural frames.

Next, reference numeral 7 designates stereoscopic spectacles used for stereoscopically viewing images from the image display devices 4, 5, and 6 such as a television receiver. These glasses 6 allow the right eye side to transmit light and shield the left eye side while the image display devices 4, 5 and 6 display or project the right eye image R, and conversely display or project the left eye image L. When the right eye image R and the left eye image L are switched, the left eye side is transmitted and the right eye side is shielded. These glasses 7
Although it is made of a polarizing plate or a liquid crystal panel, it may be mechanically opened / closed by a shutter mechanism, and the switching / opening / closing is provided by the simultaneous / sequential signal converter 3 via the cable 8 or radio waves. Done by signal.

Reference numeral 9 denotes a screen on which the right-eye video signal R and the left-eye video signal L from the projector 5 are projected. In this case, the stereoscopic eyeglasses 7 are naturally worn to view the screen 9. is there.

Also, the right-eye video signal R and the left-eye video signal L from the 2D / 3D conversion device 2 can be directly supplied to a so-called eyeglassless 3D display that does not use stereoscopic eyeglasses to view a stereoscopic image. In this 3D display without glasses, a liquid crystal display device or a liquid crystal projector that interleaves a right-eye video signal R and a left-eye video signal L for each pixel and displays them, a lenticular lens sheet arranged on the display screen or the front of the projection screen, or It can be realized by combining parallax barrier sheets, etc.,
The detailed description is omitted here.

Next, the 2D / 3D video conversion device 2 described above
First, the principle will be described with reference to FIG. In FIG. 3, focusing on a video scene in which the background does not change and the subject moves from left to right as in FIG. 3A, the right-eye video and the left-eye video are fixed as shown in FIG. 3B from this video scene. When the reproduction is performed with a time difference of, the position of the subject differs by the amount of the movement, and this results in parallax as shown in FIG.

Therefore, when the left-eye and right-eye images are reproduced from the same 2D image in this way, one image is reproduced with a delay of one to several frames from the other image (in the example of FIG. 1, the left-eye image is reproduced). By delaying the right-eye image by 2 frames with respect to the image), the original 2D image software can be converted into 3D image software consisting of a right-eye image and a left-eye image with parallax.

FIG. 4 is a schematic block diagram of a main part of the 2D / 3D video conversion apparatus 2 of FIG. 1, and a 2D video signal is input to the input terminal 21. This 2D video signal is supplied to the video switching circuit 22 on the one hand.

On the other hand, the 2D video signal is input to the field memory 25. This field memory 2
5 is variably controlled in a field unit by the memory control circuit 26 in a range from a delay amount of 0 to a maximum of 60 fields (about 1 second in the NTSC system), but this variable unit may be a time of 1 field or less.

The output of the field memory 25 is supplied to the video switching circuit 22, which has an output terminal 23 for outputting the left-eye video signal L and an output terminal 24 for outputting the right-eye video signal R. As will be described later, the output state is switched according to the direction of movement of the subject.

The 2D video signal is further supplied to the motion vector detection circuit 27, a motion vector corresponding to the motion of the video between fields is detected, and the detection result is detected by the CPU 28.
Entered in. The CPU 28 extracts a horizontal component from the motion vector and controls the memory control circuit 26 according to the horizontal component. That is, when the motion of the subject is fast and the motion vector is large, the delay amount of the field memory 5 is controlled to be small, and when the motion of the subject is slow, or when the motion vector is small as in slow motion reproduction. Controls to increase the delay amount.

The number of delay fields in the field memory 25 is 60 at maximum, which is NTS.
The time is equivalent to 1 second of the C method, and it is almost a time corresponding to a normal video scene, but when it is used for slow motion reproduction at a slower speed, a large-capacity memory of 60 fields or more may be used.

Further, the CPU 28 makes the 2D video signal the left-eye video signal when the direction of the motion vector is from left to right, and the delayed 2D video signal the right-eye video signal when the motion vector is in the opposite direction. 22 is controlled.

As described above, in a scene in which a subject moves horizontally in a 2D video signal, parallax occurs depending on the speed of movement, and the right-eye video signal R and the left-eye video signal L having the parallax with each other are generated. Is obtained at the output terminals 23 and 24.

In the above embodiment, a time difference is generated as a method of providing a parallax between the right-eye video signal R and the left-eye video signal L. However, instead of the time difference, a luminance difference is generated to utilize the Pulfrich effect. You may.

FIG. 5 shows an embodiment in this case. That is, in the present embodiment, the brightness level is 0 db to -1 instead of the field memory 25 and the memory control circuit 26.
An attenuator 29 and a gain control circuit 30 that attenuate between 0 db are used.

The attenuator 29 and the gain control circuit 30 are controlled according to the magnitude of the motion vector as in the embodiment of FIG. That is, when the motion of the subject is fast and the motion vector is large, the brightness attenuation amount of the attenuator 29 is controlled to be small, and when the motion of the subject is slow or the motion vector is small such as during slow motion reproduction. The luminance attenuation amount is controlled so as to increase.

Even when the 2D / 3D video image conversion device 2 of FIG. 1 is configured as shown in FIG. 5, the stereoscopic eyeglasses 7 are used.
May have the same configuration as described above. By the way, in the above description, which scene of the 2D video output from the video playback device 1A or the TV broadcast reception device 1B is to be 3D-converted has not been described, but of course, the entire 2D video software is 3D.
It may be D-converted, or only the scene of the 2D video software that is easy to be converted into a 3D video such as a scene where a subject moving in a certain direction exists may be 2D-converted.

When the above-mentioned specific scene of 2D video is converted into 3D, the specific scene can be automatically detected and converted into 3D. Especially, the 2D video is transmitted by TV broadcasting or the like. If so, it is desirable to do the following.

That is, in this case, as shown in FIGS. 6A and 6B, 3D indicating that the scene is to be 3D-converted in an appropriate horizontal period within the vertical blanking period immediately before the TV video signal of the specific scene. When the 2D / 3D conversion device 2 of FIG. 1 detects this 3D converted data, the converted data is inserted into the TV broadcasting station or CATV relay station side in advance, and then the converted scene is automatically 3D converted. It is configured to do so. In addition, in FIG. 1, only the video reproducing apparatus 1A and the TV broadcast receiving apparatus 1B are shown as the two-dimensional video source, but if they output a 2D video signal, a normal video camera or a two-dimensional video source may be used. Of course, it may be the CG manufacturing apparatus.

[0031]

According to the present invention, a stereoscopic image can be easily enjoyed by using general 2D image software and an ordinary image display device such as a television receiver. Significant cost reduction can be achieved.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a stereoscopic image display system adopting the present invention.

FIG. 2 is a diagram showing a right-eye image R and a left-eye image signal L of the image display device of the system.

FIG. 3 is a diagram showing an operation principle of a 2D / 3D image conversion device used in the system.

FIG. 4 is a block diagram showing an embodiment of the 2D / 3D video conversion device.

FIG. 5 is a block diagram showing another embodiment of the 2D / 3D video conversion device.

FIG. 6 is a diagram showing a transmission format of a television signal adopted in an embodiment of the present invention.

[Explanation of symbols]

 1A 2D video reproducing device 1B TV receiving device 2 2D / 3D video converting device 3 Simultaneous / sequential signal converting device 4, 5, 6 Video display device 7 Stereoscopic glasses

Claims (14)

[Claims] 1. A stereoscopic system in which two-dimensional video software is converted into three-dimensional video software having a right-eye video and a left-eye video, and the right-eye video and the left-eye video of the three-dimensional video software are input to a video display device for display. Video display method. 2. The stereoscopic video display system according to claim 1, wherein the two-dimensional video software is existing video software reproduced by a video reproducing means. 3. The stereoscopic video display system according to claim 1, wherein the two-dimensional video software is real-time video software transmitted via broadcasting or communication means. 4. The three-dimensional image display system according to claim 1, wherein the two-dimensional image software is image software output in real time from the image pickup means or the CG production means. 5. The image display device is a display device of a type using stereoscopic glasses.
3D image display method described. 6. The stereoscopic image display system according to claim 5, wherein the image display device is configured to alternately display or display the input right-eye image and left-eye image. 7. The stereoscopic display according to claim 6, wherein the image display device is configured to alternately display or display the input right-eye image and left-eye image every one to several fields. Video display method. 8. The stereoscopic spectacles are spectacles of a type that selectively passes one of the images in synchronization with the switching between the right-eye image and the left-eye image of the image display device. The stereoscopic image display system according to claim 5. 9. The stereoscopic image display system according to claim 8, wherein the image display device is a projection type display device. 10. The stereoscopic image display system according to claim 8, wherein the image display device is a direct-view type display device. 11. The stereoscopic video display system according to claim 10, wherein the video display device is a normal television receiver using a picture tube as a display unit. 12. The stereoscopic video display system according to claim 10, wherein the video display device is a small pocket television using a liquid crystal panel as a display unit. 13. The stereoscopic image display method according to claim 7, wherein the conversion of the 2D image into the 3D image is realized by generating a relative time difference between the 2D images. 14. The 3D image display system according to claim 7, wherein the conversion of the 2D image into the 3D image is realized by generating a relative luminance difference between the 2D images.