JPH01165293A - Stereoscopic video device - Google Patents

Abstract

PURPOSE:To remove the variation in time of pictures when video signals from two, right and left, TV cameras are double-speed converted and multiplexed by setting a time difference of 1/2 vertical period between the synchronizing signals of the cameras. CONSTITUTION:This stereoscopic video device is constituted in such a way that two sets of TV cameras 1L and 1R are provided and the synchronizing signal of one TV camera is delayed by 1/2 vertical period (Circuit 2) against the synchronizing signal (reference) of the other camera and video signals from the cameras 1L and 1R are respectively written in memories 4Lo, 4Le, 4Ro, and 4Re, and then, multiplexing signals are obtained by reading out (control circuit 5) the memories at double speed. Since the time difference of 1/2 vertical period is set between the right and left pictures at the time of photographing, no variation in time is produced in the pictures when the video signals of the pictures are double-speed converted and subjected to multiplex circuit. Therefore, unnaturalness in the movement of the pictures can be dissolved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stereoscopic imaging device using two left and right TV cameras.

[Summary of the invention]

The present invention relates to a stereoscopic video device, and by giving a time difference of 172 vertical periods to the synchronization signals of two left and right TV cameras, the image when the video signals from these TV left cameras are converted at double speed and multiplexed is This is to remove temporal fluctuations.

[Conventional technology]

The two TV left cameras are driven by a common synchronization signal, the left and right images of the subject are captured by the left TV cameras, the video signals of these images are converted at double speed, and the converted signals are converted into one vertical image. A device has been proposed that switches and multiplexes signals for each period, supplies this multiplexed signal to a double-speed monitor, and obtains a stereoscopic image by wearing glasses equipped with a shutter that synchronizes with the switching. There is (Unexamined Japanese Patent Publication No. 6)
2-210797 etc.).

[Problems to be Solved by the Invention] However, when performing stereoscopic viewing using the above-mentioned device, there have been cases where the display becomes slightly unnatural if there is movement in the subject.

This means that, for example, when the subject moves as shown by the arrow in Figure 5A, the left image R and the right image R are taken at the same time, as shown in the same figure. In the display, for example, the right image R is displayed with a delay of 172 vertical periods as shown in the same figure, which causes unnatural movement.

This application attempts to eliminate the unnaturalness of this movement.

[Means for solving problems]

In the present invention, two TV left cameras (LL) (IR) are provided, and the synchronization signal of one of these two TV left cameras is used as a reference, and the synchronization signal of the other is delayed by 172 vertical periods (circuit (2)).
), and the video signals from the two TV left cameras are stored in the respective memories (4La) (4Le) (4Ro) (4R
e) and read each of these memories at double speed (
This is a three-dimensional image device in which a control circuit (5) is used to obtain multiplexed signals.

[Effect]

According to this, by providing a time difference of 1/2 vertical period between the left and right images at the time of shooting, temporal fluctuations will not occur in the images when the video signals of these images are converted at double speed and multiplexed. Instead, it is possible to eliminate unnatural movements in images.

〔Example〕

In Figure 1, (LL) (IR) are the TV left cameras, and these TV left cameras IL) (IR)
The left and right images of the subject are taken at the same time as the reference camera (IL) synchronization signal is taken out, and this synchronization signal is sent to the camera (IL) via a delay circuit (2) with a vertical period of 172 IR). This allows the camera (
A time difference of 172 vertical periods is provided between the left and right images taken with IL) (IR).

The video signals of the images from these cameras (LL> (IR) are stored in the memory (4Lo) for one field through switches (3L) (3R) which are switched by the vertical synchronization signals of the cameras (IL) and (IR), respectively. ) (4Le
) (4Ro) (4Re).

Furthermore, the synchronization signal from the camera (IL) is sent to the control circuit (5).
For example, as shown in Fig. 2A and B, the camera (
IL) odd field (Lo), even field (IL)
A predetermined write clock signal is supplied to the corresponding memory (4Lo) (4Le) (4Ro) (4Re) according to the odd field (Ro) and even field (Re) of the camera (IR). Ru. This allows memo 'J (4Lo) (4Le), (4Ro) (4R
Odd and even field video signals from the cameras (IL) and (IR) are alternately written in e).

Furthermore, approximately 2 of the write clock signal is output from the control circuit (5).
The successive clock signals with twice the frequency correspond to the memory (4Lo) (4Le) (4Ro) (
4Re). Therefore, video signals converted to double speed are respectively taken out from each memory.

This memo! The signal from J (4Lo) (4Le) is taken out through the switch (6S) which is switched in the opposite phase to the switch (3L), and the signal from Memo'J (4Ro) (4Re
) is taken out through a switch (6R) which is switched in opposite phase to the switch (3R). This switch (
6L) The signal from (6R) is supplied to the switch (7) which is switched at the timing of left and right (L, R>) shown in C of the above figure.

As a result, a multiplexed double-speed stereoscopic video signal is formed as shown in C in the above-mentioned figure. This signal is then supplied to the double-speed monitor (8), and by wearing the shutter glasses (9) to which the switching signal of the switch (7) described above is supplied, images from the left and right TV left cameras (LL) (IR) are displayed. are separated and stereoscopic viewing is performed.

In this case, since there is a time difference of 172 vertical periods between the left and right images when photographing, even for a moving subject as shown in Figure 3A, for example, the photographing is performed on the left side as shown in the figure. The image R and the right image R are 172 vertical periods (V
), and when this signal is double-speed converted and multiplexed, the display will be as shown in the same figure, and no temporal fluctuations will occur.

In this way, according to the above-mentioned device, when shooting, the left and right images have 1
By providing a time difference of 72 vertical periods, when the video signals of these images are double-speed converted and multiplexed, temporal fluctuations do not occur in the images, and unnaturalness in image movement is eliminated. Can be done.

In the above-described apparatus, the frequency of the successive clocks from the control circuit (5) is, for example, the frequency of the write clock in the case of the NTSC system. As a result, an offset of 1/4 horizontal period is generated for each field (Lo) (Le) (Ro) (Re) that is double-speed converted and multiplexed, and when this signal is displayed, a so-called 4:1 interlaced screen is generated. is formed.

That is, this screen is formed as schematically shown in FIG. 4, and when this screen is viewed through shutter glasses (9), the odd numbers (0),
An even number (e) of scanning lines are interlaced, making it possible to obtain an extremely good image with little flicker.

〔Effect of the invention〕

According to this invention, by providing a time difference of 172 vertical periods between the left and right images at the time of shooting, there is no temporal variation in the images when the video signals of these images are converted at double speed and multiplexed. , it is now possible to eliminate unnatural movement in images.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an example of the present invention, FIGS. 2 to 4 are diagrams for explaining the same, and FIG. 5 is a diagram for explaining a conventional technique. (IL) (IR) is a TV camera, (2) is a 1/2 vertical period delay circuit, (3L) (3R) (6L) (6R
) (7) is a switch, (4Lo) (4Le) (4R
o) (4Re) is memory, (5) is control circuit, (8)
(9) is a double-speed monitor, and (9) is a pair of shutter glasses. Agent Paige Ito
Hide Matsukuma ■ Figure 2 Figure 3 Figure 5 Diagram of 4-1 Ink Relay Figure 4

Claims (1)

[Claims] Two TV cameras are provided, and the synchronization signal of one of these two TV cameras is used as a reference, and the synchronization signal of the other is delayed by 1/2 vertical period,
A stereoscopic imaging device that writes video signals from V-cameras into memories, and reads each of these memories at double speed to obtain multiplexed signals.