JPH08205029A - Multi-video image display system - Google Patents

Abstract

PURPOSE: To transmit a video image picked up by a main image pickup camera or a couple of stereoscopic image pickup cameras and a video image picked up by plural background pickup cameras through one transmission means and to display the transmitted image on a display means. CONSTITUTION: A video image picked up by a main image pickup camera 5 or a couple of stereoscopic image pickup cameras 6, 7 is displayed on a 1st monitor 37 via a 1st transmission cable 2 and a video image picked up by background image pickup cameras 8-11 is displayed on 2nd - 5th monitors 39-42 via a 2nd transmission cable 3. In this case, fields of video signals V21, V22, V31 to V34 from the stereoscopic image pickup cameras 6, 7 and the background image pickup cameras 8-11 are sequentially shifted by lst and 2nd multi- video image synthesizers 13, 14 to synthesize the fields of the video signals and separated again by 1st and 2nd multi-video image separators 33, 38 and the separated signal is extracted as a frame image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-image display system for displaying each image photographed by a plurality of cameras on a display means, and particularly, a main photographing camera, a stereoscopic photographing camera and a back shadow photographing camera. The present invention relates to a multi-video display system that displays each video on a display means.

[0002]

2. Description of the Related Art In a production line of a factory, a construction site such as a building, a civil engineering construction site, etc., a plurality of surveillance cameras are set at predetermined places and the images from each surveillance camera are displayed on a plurality or one monitor device. The situation of different places can be monitored at the same time. When displaying each video from a plurality of surveillance cameras on a monitor device, conventionally, a method has been generally used in which each video signal from each surveillance camera is sent by a dedicated transmission cable and displayed on each monitor device. .

[0003]

As described above, conventionally, the installation is performed in order to transmit video signals from a plurality of surveillance cameras mounted to a monitor device through a transmission cable connected to each surveillance camera. Transmission cables are required according to the number of surveillance cameras. For this reason, since it is necessary to wire a large number of transmission cables, there is a problem that the wiring process becomes complicated and the cost becomes high. Even when it is desired to check the stereoscopic effect such as the depth of the shooting target displayed on the monitor device, since the image displayed on the monitor device is a two-dimensional plane, the stereoscopic effect such as the depth of the displayed shooting target is displayed. I couldn't figure out exactly. It is also possible to transmit the video signals from a plurality of cameras with a single transmission cable. In this case, however, if the number of cameras is four, for example, the video signals from each camera are conventionally 1 /
Since the image is divided into four and transmitted, the image quality of the image of each camera expressed by the monitor device is reduced to ¼, and the image information is also reduced to ¼, which makes the screen difficult to see.

The present invention has been made to solve the above-mentioned problems, and enables video signals from each camera to be transmitted without using a dedicated transmission cable, and at a low cost, the image quality and the video information are significantly reduced. An object of the present invention is to provide a multi-image display system that can display a stereoscopic image without performing the above.

[0005]

In order to solve the above-mentioned problems, the present invention is directed to a subject to be photographed, a main photographing camera for converting a photographed image into a video signal, and the main photographing camera. A pair of stereoscopic photographing cameras, which are arranged substantially parallel to the photographing direction of the main photographing camera and are arranged substantially parallel to each other, and convert a photographed video into a video signal, and the main photographing camera. A plurality of units which are arranged around the main photographing camera at a predetermined angle, and which photograph the periphery of the photographing target photographed by the main photographing camera and convert each photographed image into a video signal. Of the background photographing camera and each of the video signals from the pair of stereoscopic photographing cameras, shift each field of each video signal by one field and sequentially select and separate the fields. First multi-video synthesizing means for sequentially synthesizing the generated fields and each video signal from each video signal from the plurality of background photographing cameras, and shifting each field of each video signal by one field. Second multi-image synthesizing means for sequentially synthesizing the separated fields after sequentially selecting and separating, a video signal from the main photographing camera and a composite video signal from the first multi-video synthesizing means And a video signal from the main photographing camera or a composite video signal from the first multi-video synthesizing means by switching between the first switching means and the first switching means. And a first transmission means for transmitting one system, a second transmission means for one system for transmitting a synthesized video signal from the second multi-video synthesis means, and the first switching means. A second switching means capable of switching in response to a switching operation of the switching means, the first switching means, the first transmission means, and the second switching means, and the first multi-image synthesizing field The synthesized video signal that is synthesized is taken in and the synthesized video signal is set to 1
First multi-image separating means, first switching means, first transmitting means, the first transmitting means, which sequentially selects and separates each field and separates the images corresponding to each video signal from the stereoscopic camera as a frame, respectively. A video signal from the main photographing camera via the second switching means, or a pair of video signals from the first switching means, the first transmitting means, the second switching means, and the first multi-video separating means. First display means for capturing a video signal from the stereoscopic camera and displaying a video image captured by the main camera or the pair of stereoscopic cameras, and the pair of stereoscopic images by the first display means. A stereoscopic image means for viewing an image captured by a camera for photographing as a stereoscopic image, and a composite image field-synthesized by the second multi-image composition means via the second transmission means. Second multi-image separating means for taking in signals, sequentially selecting and separating the composite video signals one field at a time, and extracting video corresponding to the video signals from the background photographing cameras as frames, respectively. And a second display means for capturing the video signals output after being frame-separated by the multi-video separation means and displaying the video images captured by the respective background-capturing cameras.

[0006]

According to the present invention, a video image taken by the main photographing camera or the pair of stereoscopic photographing cameras is displayed on the first display means via the first transmission means, and is displayed by the plurality of background photographing cameras. The captured image is displayed on the second display means via the second transmission means. At this time, the fields of the video signals from the pair of stereoscopic shooting cameras and the plurality of background shooting cameras are shifted one by one, sequentially selected and separated, and then the separated fields are sequentially combined to obtain The field-combined composite video signals can be transmitted by one transmission means. Then, this composite video signal can be sequentially selected and separated one by one again, and the video corresponding to the video signal from each camera can be extracted as a frame image and displayed on the first and second display means.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in the drawings. FIG. 1 is a block diagram showing the configuration of a multi-video display system according to an embodiment of the present invention. As shown in this figure, the multi-image display system according to this embodiment includes a camera unit 1 and first and second transmission cables 2, 3
And a display unit 4. The camera unit 1 includes a main photographing camera 5 for photographing a photographing target and a main photographing camera 5
A pair of stereoscopic cameras 6 and 7 for stereoscopically photographing an object to be photographed, and four background photographing cameras 8 and 9 for photographing the periphery of the object to be photographed by the main photographing camera 5.
10 and 11 are provided. Main shooting camera 5, stereoscopic shooting cameras 6, 7, background shooting cameras 8, 9, 10, 11
Is attached to the camera platform 12 in a cross shape as shown in FIGS. 2, 3 and 4, and the main photographing camera 5 is attached to the central portion thereof with equal intervals on both sides thereof. A pair of stereoscopic photographing cameras 6 and 7 are attached substantially parallel to the photographing direction of the photographing camera 5, and the upper and lower sides of the main photographing camera 5 and both sides of the stereoscopic photographing cameras 6 and 7 are respectively used for background photographing. Cameras 8, 9, 10, 11 are attached. The camera platform 12 is vertically and horizontally movable.

The back shadow photographing cameras 8, 9, 10 and 11 are mounted outwardly at an angle of about 60 ° with respect to the main photographing camera 5, respectively. The main shooting camera 5,
3D camera 6,7, background camera 8,9,1
The angles of 0 and 11 can be adjusted arbitrarily. The main photographing camera 5, the stereoscopic photographing cameras 6 and 7, and the background photographing cameras 8, 9, 10 and 11 respectively convert the photographed images into an NTSC video signal (video signal) via a solid-state image sensor (CCD). Convert. A first multi-video synthesizing device 13 is connected to the stereoscopic photographing cameras 6 and 7, and a second multi-video synthesizing device 14 is connected to the back shadow photographing cameras 8, 9, 10, and 11. A first changeover switch 15 is attached between the main photographing camera 5 and the first multi-video synthesizing device 13, and the first changeover switch 15 includes the main photographing camera 5 and the first changeover switch 15. The video signals V1 and V2 respectively output from the multi-video synthesizing device 13 are switched to output either one of the video signals V1 and V2 to the display unit 4 side via the first transmission cable 16.

As shown in FIG. 5, the first multi-video synthesizing device 13 includes a signal converting section 16 and a video signal separating switch 1.
7 and a memory 18. The signal conversion unit 16 uses the video signals V21 and V22 from the stereoscopic cameras 6 and 7, respectively.
A frame memory (F / F) for digitally converting an image through an A / D converter (not shown) and performing field / frame memory
M) 19a, 19b and frame memories 19a, 19b
D / each video signal V21, V22 digitally converted by
Y / C separation / decoder 2 which separates the respective video signals V21 and V22, which have been analog-converted again via an A converter (not shown), into a luminance (Y) signal and a color (C) signal and converts them into RGB signals.
0a, 20b and encoders 21a, 21 for converting RGB signals respectively obtained by the Y / C separation decoders 20a, 20b into original NTSC video signals V21, V22.
b and a sync signal generator 22 for issuing a sync signal for synchronizing (horizontal sync, vertical sync, color sync) between the video signals V21 and V22 output from the encoders 21a and 21b.
And an identification signal generator 23 for issuing an identification signal for identifying each field of the video signals V21 and V22 output from the encoders 21a and 21b.

In the frame memories 19a and 19b, the Y / C separation / decoder 2 is synchronized with the fields of the video signals V21 and V22 from the stereoscopic photographing cameras 6 and 7, respectively.
It is output to 0a and 20b. Video signal separation switch 17
Is 1 for each video signal V21, V22 from the stereoscopic cameras 6, 7 output from the encoders 21a, 21b.
The video signals V21 and V22 from the stereoscopic photographing cameras 6 and 7 are combined as one field image in one frame and separated into each field so as to be sequentially shifted by one field. On the other hand, as shown in FIG. 6, the second multi-video synthesizing device 14 also includes the signal converting unit 24.
And a video signal separation switch 241 and a memory 242.

The signal conversion unit 24 includes a background photographing camera 8,
9, 10, 11 video signals V31, V32, V33,
Frame memory (FM) 25a, 25b, 25c, 25d for digitally converting V34 through an A / D converter (not shown) and performing field / frame memory, and digital conversion by frame memories 25a, 25b, 25c, 25d. The respective video signals V31, V32, V33, V34 which have been subjected to analog conversion again through a D / A converter (not shown) are converted into the respective video signals V31, V32, V33, V34, and the luminance (Y) signal and color (C). Y / C separation / decoders 26a, 26b, 26c, 26d for separating signals into RGB signals
And Y / C separation / decoders 26a, 26b, 26c, 2
Encoders 27a, 27b, 27 for converting the RGB signals respectively obtained in 6d into the original NTSC video signals
c, 27d and encoders 27a, 27b, 27c, 2
7d output video signals V31, V32, V33,
A sync signal generator 28 for issuing a sync signal for synchronizing V34 (horizontal sync, vertical sync, color sync) and video signals V31, V32, V33, V34 output from the encoders 27a, 27b, 27c, 27d. It is provided with an identification signal generator 29 which issues an identification signal for identifying each field. The frame memories 25a, 25b, 25
In C and 25d, Y / C separation / decoder 26a, which synchronizes the fields of the video signals V31, V32, V33, and V34 from the background photographing cameras 8, 9, 10, and 11, respectively.
It is output to 26b, 26c and 26d.

The video signal separating switch 241 is provided for each video signal V3 from the background photographing cameras 8, 9, 10, 11 output from the encoders 27a, 27b, 27c, 27d.
1, V32, V33, and V34 are separated so that they are sequentially shifted by one field for each field, and the video signals V3 from the background cameras 8, 9, 10, and 11 are included in two frames.
1, V32, V33, and V34 are combined as an image for each field, and are captured in the memory 242. The display unit 4 displays a first display unit 30 that displays a video signal from the main shooting camera 5 or the stereoscopic shooting cameras 6 and 7, and a video signal from the background shooting cameras 8, 9, 10, and 11. Second
And the display unit 31 of. First display unit 30
Includes a second changeover switch 32, a first multi-image separation device 33, a stereoscopic image control device 34, and stereoscopic glasses 3
5, a video signal switching device 36, and a first monitor device 37, and the second display unit 31 includes a second multi-video separating device 38, a second, a third, a fourth, and a fifth device. Monitoring devices 39, 40, 41, 42 of

The second changeover switch 32 is changed over in conjunction with the first changeover switch 15, and when the first changeover switch 15 is changed over to the main photographing camera 5 side, the second changeover switch 32 is brought to the contact A1 side and stereoscopic photographing. When it is switched to the side cameras 6 and 7, it is switched to the contact A2 side. In the first multi-image separation device 33, the first changeover switch 15 is on the stereoscopic photographing cameras 6 and 7 side, and the second changeover switch 32 is the contact A2.
When switched to the side, as shown in FIG. 7, the video signal V2 obtained by synthesizing the video signals V21 and V22 into one frame by the first multi-video synthesizing device 13 into one frame is used as the frame memory 43a. , 43b to generate a frame image. That is, the frame image of the video signal V21 is stored in the frame memory 43a in a callable manner, and the frame image of the video signal V22 is stored in the frame memory 43b in a callable manner.

The video signal switching device 36 outputs the signal from the main photographing camera 5 when the first changeover switch 15 is changed to the main photographing camera 5 side and the second changeover switch 32 is changed to the contact A1 side. The video signal V1 is directly output to the first monitor device 37. Then, when the first changeover switch 15 is changed over to the stereoscopic photographing cameras 6 and 7 side and the second changeover switch 32 is changed over toward the contact A2 side,
Image signals V21 from the stereoscopic photographing cameras 6 and 7 regenerated as frame images by the multi-image separating device 33.
a and V22a (corresponding to video signals V21 and V22, respectively) are alternately switched and output to the first monitor device 37.

The stereoscopic video control device 34 switches each of the stereoscopic glasses 35 in synchronization with the switching timing of the video signals V21a and V22a alternately switched from the first multi-video separation device 33 to the first monitor device 37. Control is performed to alternately open and close the shutter portions 35a and 35b. A liquid crystal having a shutter function can be used for the shutter portions 35a and 35b, for example. As shown in FIG. 8, the second multi-video synthesizing device 38 uses the second multi-video synthesizing device 14 to generate video signals V31, V32, V in two frames.
The video signal V3 obtained by synthesizing 33 and V34 as a video for each field is used as each frame memory 44a, 44b, 44.
c and 44d are respectively distributed to generate a frame image. That is, the frame image of the video signal V31 is stored in the frame memory 44a in a callable manner, the frame image of the video signal V32 is stored in the frame memory 44b in a callable manner, and the video signal V33 is stored in the frame memory 44c.
Frame image of the video signal V34 is stored in the frame memory 44d in a callable manner.

The first, second, third, fourth and fifth monitors 37, 39, 40, 41 and 42 are shown in FIGS. 9 (a) and 9 (b).
As shown in FIG.
Second, third, fourth, and fifth monitor devices 39, 40, 41, and 42 are installed above and below and on the left and right, respectively.
The second, third, fourth and fifth monitoring devices 39, 40,
41 and 42 are background photographing cameras 8, 9, and 1, respectively.
0, 11 and the second, third, fourth, and fifth monitoring devices 39, 40, 41, 42 are respectively the first
The monitor device 37 is disposed inward at an angle of about 60 °.

Next, the video display operation of the multi-video display system according to the present invention will be described. Main shooting camera 5, stereoscopic shooting cameras 6 and 7, back shadow shooting camera 8,
The camera platform 12 to which 9, 1011 are attached is installed, for example, at a position overlooking the work range of the worker at a construction site or the like, and the first and second multi-video synthesizing devices 13 and 14 and the first changeover switch are installed. 15 is also installed near the camera platform 12, and the display unit 4 is installed near the operator. The camera unit 1 and the display unit 4 are connected to the first and second transmission cables 2, 3
Connected by. Then, in the normal state, the first changeover switch 15 is switched to the main photographing camera 5 side and the second changeover switch 32 is switched to the contact A1 side, so that the main object to be photographed (not shown) is directed. The video signal V1 from the photographing camera 5 is output to the first monitor device 37 via the first changeover switch 15, the first transmission cable 2, the second changeover switch 32, and the video signal changeover device 36. The video image captured by the camera 5 is displayed.

On the other hand, background photographing cameras 8, 9, 10, 1
The video signals V31, V32, V33, V34 from 1 are taken into the signal conversion unit 24 of the second multi-video synthesizer 14, and the video signals V31, V32, V33, V34 are
Frame memories 25a, 25b, 2 after digital conversion
5c and 25d, respectively, and read out, and then converted into analog signals to separate Y / C separation / decoder 26a,
Y / C separated by 26b, 26c, and 26d, respectively, and R
It becomes a GB signal. After that, each encoder 27a, 27
b, 27c and 27d, the original video signals V31 and V3 are reproduced again.
2, V33, V34 back to video signal separation switch 25
Is output to At this time, the synchronization signal generation unit 28 uses the video signal V31 of the background photographing camera 8 captured in the frame memory 25a as a reference for synchronization, and the encoder 27a,
Video signal V3 output from 27b, 27c, and 27d
1, V32, V33, V34 to output sync signals (horizontal sync signal, vertical sync signal, color sync signal) to the video signal V
Synchronization among 31, V32, V33, and V34 (horizontal synchronization, vertical synchronization, color synchronization) is established. Also, the video signals V31 and V3
An identification signal is added from the identification generation unit 29 to the video signals V31, V32, V33, V34 output from the encoders 27a, 27b, 27c, 27d so that each field of V2, V33, V34 can be identified.

At this time, the video signal V3 output from the background image capturing cameras 8, 9, 10, 11 output from the signal conversion unit 24.
As shown in FIG. 10A, 1, V32, V33, and V34 form one frame with two fields and one sequence is formed with two frames. That is, the video signals V31, V32, V of the background photographing cameras 8, 9, 10, 11
In 33 and V34, two frames (one sequence) are formed by the first, second, third, and fourth fields F1, F2, F3, and F4, respectively, and are continuous in this one sequence.
The first field F1 is an odd field (V), the second field
The field F2 is an even field (E), the third field F3 is an odd field (V), and the fourth field F4 is an even field (E).

Then, the background photographing cameras 8, 9, 10,
Each video signal V31, V32, V33, V34 from 11
Are synchronized with the synchronizing signal output from the synchronizing signal generator 28 and input to the video signal separation switch 241. Then, as shown in FIG. 10B, the video signal separation switch 241 makes two frames (one sequence) into an odd first field F1 (V) of the video signal V31 of the background shooting camera 8 and the background shooting. Video signal V3 of camera 9
2 and an even second field F2 (E) of 2 and an odd third field F3 of the video signal V33 of the background shooting camera 10.
(V) and the even numbered fourth field F4 (E) of the video signal V34 of the background photographing camera 11 are sequentially selected and switched, and the same sequence is repeated.

By performing such field switching with the video signal separation switch 241, as shown in FIG. 10C, the video signal V31 of the background photographing camera 8 is included in two frames (one sequence). First field F
1. Second field F2 of video signal V32 of background shooting camera 9, third field F3 of video signal V33 of background shooting camera 10, video signal V of background shooting camera 11
The fourth field F4 of 34 is sequentially selected, and the memory 2
42. The identification signal generator 29 is provided in the first, second, third and fourth fields F1, F2, F3 and F4.
The identification signal output from the camera is added to the video signals V31, V32, V31 of the background photographing cameras 8, 9, 10, 11.
First, second, third and fourth fields F of V33 and V34
1, F2, F3, and F4 can be identified.

The video signal (NTSC signal) V3 synthesized by the second video synthesizer 14 is input to the second multi-video separator 38 via the second transmission cable 3. The video signal V3 input to the second multi-video separation device 38
In each of the fields F1, F2, F3, and F4 that compose
Since the respective identification codes are added, the frame memories 44a, 44b, 44c, 4 in the second multi-video separating apparatus 38 are based on the identification codes as shown in FIG.
4d are separated and sequentially written. That is, as shown in FIG. 11A, in the frame memory 44a,
In the first field F1 of the video signal V31 of the background shooting camera 8 and the frame memory 44b, the background shooting camera 9
Of the video signal V32 of the background photographing camera 10 in the second field F2 and the frame memory 44c.
In the third field F3 and the frame memory 44d, the video signals of the fourth field F4 of the video signal V34 of the background photographing camera 11 are sequentially written, respectively, so that the second multi-video synthesizer 14 field-synthesizes them. The composite video is field separated again.

Then, as shown in FIGS. 11 (b) and 11 (c), the frame memories 44a, 44b, 44c, and 44d are written in the first, second, third, and fourth frames F, respectively.
1, F2, F3, and F4 are read out twice consecutively to form one frame to form a frame image. Then, the video signals V31a and V3 which are converted into one frame video by the frame memories 44a, 44b, 44c and 44d, respectively.
2a, V33a, V34a (background shooting cameras 8, 9,
Video signals V31, V32, V33, V from 10, 11
(Corresponding to each of 34) is output to the second, third, fourth, and fifth monitoring devices 39, 40, 41, and 42, respectively, so that the second, third, fourth, and fifth monitoring devices 39, 40, 41, and 42 are output. Images captured by the background image capturing cameras 8, 9, 10, 11 are displayed on the monitor devices 39, 40, 41, 42, respectively.

At this time, the frame memories 44a, 44b,
By 44c and 44d, background photographing cameras 8, 9 and 1
0, 11 video signals V31, V32, V33, V34
The same field is continuously read twice in each frame, and the output signal (video signal V31
a, V32a, V33a, V34a) is one frame (1
Every 30 seconds), it is output to the second, third, fourth, and fifth monitor devices 39, 40, 41, 42, respectively, so that the image quality is continuous by forming one frame in two normal fields. In the present embodiment, for example, the background photographing camera 8 scans the first field F1 twice in one frame, so that the scanning line The line is halved).

Further, the image information is also a normal 2 field 1
It becomes about 1/2 of an image formed by forming a frame and continuously field scanning (in the present embodiment, for example, the background photographing camera 8 keeps an interval of 1 frame (1/30 second)). By scanning the first field F1 within a frame, images without image information for one frame (1/30 seconds) are continuously displayed). The images captured by the background image capturing cameras 8, 9, 10, and 11 are recorded on the second, third, fourth, and fifth monitor devices 39, 40, 41, 42.
In each case, the image quality and the image information are about 1/2 of the normal one, but when used in a monitoring device used at a construction site, there is no problem in practical use. Further, the first and second transmission cables 2, 3 connected between the camera unit 1 and the display unit 4
Since only two cables are required, it is possible to process cables without complication, especially at construction sites.

As described above, the image of the object to be photographed by the main photographing camera 5 is normally displayed on the first monitor device 37 installed in the central portion, and the background photographing cameras 8, 9, 1 are used.
The second, third, fourth, and fifth monitor devices 39, 40, 41, 42 in which the images around the object to be photographed at 0 and 11 are installed above and below and on the left and right of the first monitor device 37, respectively.
Therefore, even when the operator and the like cannot directly see the object to be photographed and the surroundings, the operator can see the object to be photographed and the first to fifth monitor devices 37, 39, 40, 41, 42. You can get a sense of reality as if you were looking directly at the surrounding situation.

Then, as described above, when the main photographing camera 5 photographs the object to be displayed and is displayed on the first monitor device 37, for example, when plural object to be photographed are displayed, the positional relationship between them is shown. When it is desired to accurately grasp the information, the first changeover switch 15 is changed over to the stereoscopic photographing cameras 6 and 7, and the second changeover switch 32 is changed toward the contact A2 side. First
Of the video signal V21 from the stereoscopic shooting cameras 6 and 7 by switching the switching switch 15 of the stereoscopic shooting camera 5 side to the stereoscopic shooting camera 5 side and the second switch 32 to the contact A2 side.
V22 is the signal conversion unit 1 of the first multi-video synthesizer 13.
6, the video signals V21 and V22 are digitally converted and written into the frame memories 19a and 19b, respectively, read out, and then converted into analog,
Y / C separation / decoders 20a and 20b respectively
The C signal is separated into RGB signals. Then, the encoders 21a and 21b restore the original video signals V21 and V22 again and output them to the video signal separation switch 17. At this time, the synchronization signal generation unit 22 uses the video signal V21 of the stereoscopic camera 6 captured in the frame memory 19a as a reference for synchronization and synchronizes the video signals V21 and V22 output from the encoders 21a and 21b with a synchronization signal (horizontal signal). Sync signal,
(Vertical sync signal, color sync signal) is output, and the video signal V2
1 and V22 are synchronized (horizontal synchronization, vertical synchronization, color synchronization). Further, an identification signal is added from the identification signal generator 23 to the video signals V21 and V22 output from the encoders 21a and 21b so that the fields of the video signals V21 and V22 can be identified.

At this time, the video signals V21 and V22 from the stereoscopic photographing cameras 6 and 7 which are output from the signal conversion unit 16.
As shown in FIG. 12A, 2 frames form one frame. That is, the stereoscopic camera 6,7
The video signals V21 and V22 are continuous with one frame formed by the first and second fields F1 and F2, respectively. The first field F1 is an odd field (V),
The second field F2 is an even field (E).

Then, the respective video signals V21 and V22 from the stereoscopic photographing cameras 6 and 7 are input to the video signal separation switch 17 in synchronization with the synchronization signal output from the synchronization signal generator 22. Then, as shown in FIG. 12B, the video signal separation switch 17 causes the first odd-numbered video signal V21 of the stereoscopic shooting camera 6 to be displayed in one frame.
The field F1 (V) and the even numbered second field F2 (E) of the video signal V22 of the stereoscopic camera 7 are sequentially selected and switched, and the same sequence is repeated.

By carrying out such field switching by the video signal separation switch 17, as shown in FIG. 12C, the first field F1 of the video signal V21 of the stereoscopic camera 6 is displayed within one frame. The second field F2 of the video signal V22 of the stereoscopic camera 7 is sequentially selected and stored in the memory 18. An identification signal output from the identification signal generation unit 23 is added to the first and second fields F1 and F2 sequentially captured in the memory 18, and the video signals V21 and V22 of the stereoscopic photographing cameras 6 and 7 are added.
The first and second fields F1 and F2 are sequentially identified.

The video signal (NTSC signal) V2 synthesized by the first multi-video synthesizer 13 is input to the first multi-video demultiplexer 33 via the first transmission cable 2. An identification code is added to each of the fields F1 and F2 forming the video signal V2 input to the first multi-video separation device 33. Therefore, based on this identification code, as shown in FIG. 1 multi video separation device 33
The frame memories 19a and 19b therein are separated and sequentially written. That is, as shown in FIG. 13A, the frame memory 19a has the first field F1 of the video signal V21 of the stereoscopic shooting camera 6, and the frame memory 19b has the first field F22 of the video signal V22 of the stereoscopic shooting camera 7. By sequentially writing the video signals of the two fields F2, the composite video field-composited by the first multi-video composition device 13 is field-separated again.

Then, as shown in FIGS. 13B and 13C, the frame memories 19a and 19b successively read the written first and second fields F1 and F2 twice to form one frame, respectively. Try to compose the video. Then, the video signals V21a and V22a which are converted into one frame video in the frame memories 19a and 19b, respectively.
(Corresponding to the video signals V21 and V22 of the stereoscopic cameras 6 and 7 respectively) are output to the video signal switching device 36. The video signal switching device 36 includes video signals V21a and V2 input from the first multi-video separating device 33.
2a is alternately switched at intervals of, for example, 1/60 second and is output to the first monitor device 37, so that images captured by the stereoscopic camera 6 and 7 are alternately displayed on the first monitor device 37. To be done.

At this time, the shutter of the stereoscopic glasses 35 is synchronized with the switching timing of the video signals V21a and V22a which are alternately switched from the video signal switching device 36 to the first monitor device 37 by the stereoscopic video control device 34. Control for alternately opening and closing the parts 35a and 35b is performed. Then, when the worker or the like looks at the screen of the first monitor device 37 through the shutter portions 35a and 35b of the stereoscopic glasses 35 in this state, the images taken by the stereoscopic shooting cameras 6 and 7 can be viewed stereoscopically. . That is, by shooting the shooting target with the stereoscopic shooting cameras 6 and 7 installed at predetermined intervals, the images of the shooting target whose shooting directions are slightly shifted are alternately switched and displayed on the first monitor device 37. To be done.
When this image is viewed through the shutters 35a and 35b of the stereoscopic glasses 35 whose switching timings are synchronized, the images captured by the stereoscopic cameras 6 and 7 are combined by the afterimage effect of the naked eye, and the target is captured. You can see it in three dimensions. Note that the second, third, fourth, and fifth monitor devices 39, 40, 41, and 42 display images photographed by the background photographing cameras 8, 9, 10, and 11 as described above.

In this way, when it is desired to accurately grasp the depth of the object to be photographed, the main photographing camera 5 is switched to the stereoscopic photographing cameras 6 and 7, and the stereoscopic image of the photographing object is displayed on the first monitor device 37. You can see. Further, in the above-mentioned embodiment, the background photographing cameras 8, 9, 10 and 11 are arranged so as to face outward, respectively, but as shown in FIGS. You may arrange so that it may face at the angle of. Further, by using a video deck capable of synchronously recording two NTSC signals at the same time, the main photographing camera 5 or the first multi-video synthesizing device (which is transmitted by the first and second transmission cables 2 and 3 respectively) The video signal from the stereoscopic camera 6, 7) and the second
Multi-video synthesizer (background camera 9, 10, 1)
It is possible to record and reproduce as an image in which the two transmission screens of the video signals from 1, 12) are synchronized. Also, by using two VCRs with built-in time code,
Video signals from the main shooting camera 5 or the first multi-video synthesizing apparatus (stereoscopic shooting cameras 6 and 7) transmitted by the first and second transmission cables 2 and 3, respectively, and the second multi-video synthesizing Device (Background camera 9, 10, 1
Even if the video signals from (1) and (12) are independently recorded, they can be reproduced in synchronization. In the above-described embodiment, the camera unit 1 and the display unit 4 are connected by the first and second transmission cables 2 and 3, respectively.
It is also possible to wirelessly transmit the video signal from the display unit 4 side.

[0035]

As described above in detail with reference to the embodiments, according to the present invention, the image of the object photographed by the main photographing camera and the surroundings of the object photographed by the background photographing camera. By displaying each of the images, you can easily grasp the situation of the shooting target and its surroundings.
In addition, by switching from the main camera for stereoscopic shooting to the camera for stereoscopic shooting, it is possible to see the shooting target in three dimensions, so that the situation of the shooting target can be grasped more accurately. Further, since the video signal from the main shooting camera or the stereoscopic shooting camera and the video signal from the plurality of background shooting cameras can be transmitted by one transmission means, respectively, the transmission means can easily process. In addition, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a multi-video display system according to the present invention.

FIG. 2 is a front view showing an arrangement state of cameras.

FIG. 3 is a plan view showing an arrangement state of cameras.

FIG. 4 is a side view showing an arrangement state of cameras.

FIG. 5 is a configuration diagram showing a first multi-image synthesizing device.

FIG. 6 is a configuration diagram showing a second multi-image synthesizing device.

FIG. 7 is a configuration diagram showing a first multi-image separation device.

FIG. 8 is a configuration diagram showing a second multi-image separation device.

FIG. 9A is a front view showing an arrangement state of a monitor device, and FIG. 9B is a side view thereof.

FIG. 10 is an explanatory diagram of field separation and combination processing in the second multi-image separation device.

FIG. 11 is an explanatory diagram of field separation processing in the second multi-image separation device.

FIG. 12 is an explanatory diagram of field separation and combination processing in the first multi-image separation device.

FIG. 13 is an explanatory diagram of field separation processing in the first multi-image separation device.

FIG. 14A is a plan view showing another arrangement example of the camera, and FIG. 14B is a side view thereof.

[Explanation of symbols]

 1 Camera Section 2 1st Transmission Cable 3 2nd Transmission Cable 4 Display Section 5 Main Shooting Camera 6,7 Stereoscopic Shooting Camera 8, 9, 10, 11 Background Shooting Camera 13 First Multi-Video Composition Device 14 Second multi-image synthesizing device 15 First changeover switch 33 First multi-image separating device 35 Stereoscopic glasses 37 First monitor device 38 Second multi-image separating device 39 Second monitor device 40 Third monitor device 41 Fourth Monitoring Device 42 Fifth Monitoring Device

Claims (5)

[Claims] 1. A main photographing camera which is directed to a photographing target and converts a photographed image into a video signal, and the main photographing camera which is provided on the substantially same plane as the main photographing camera with a predetermined interval. A pair of cameras for stereoscopic photography, each of which is arranged substantially parallel to the photographing direction of the, for converting a captured image into a video signal, and a predetermined angle is provided around the main photography camera with respect to the main photography camera. From the pair of stereoscopic cameras, each of which is provided with a plurality of background photographing cameras that photograph the surroundings of the photographing target photographed by the main photographing camera and convert each photographed image into a video signal. A first multi-video combination in which each video signal is fetched, each field of each video signal is shifted by one field, sequentially selected and separated, and then the separated fields are sequentially combined. Forming means and each video signal from each video signal from the plurality of background photographing cameras is taken in, each field of each video signal is shifted by one field and sequentially selected, and then separated. A second multi-video synthesizing means for sequentially synthesizing fields, a video signal from the main photographing camera, and a composite video signal from the first multi-video synthesizing means are arbitrarily selected and switchable. Switching means, and a first transmission means of one system for transmitting the video signal from the main photographing camera or the composite video signal from the first multi-video synthesizing means by switching the first switching means, One system of second transmission means for transmitting the composite video signal from the second multi-video composition means, and a second switchable means corresponding to the switching operation of the first switching means. The composite video signal field-combined by the first multi-video composition means via the switching means, the first switching means, the first transmission means, and the second switching means, and the composite video signal is set to 1 First multi-image separating means for sequentially selecting and separating the fields one by one and separating the images corresponding to the respective video signals from the stereoscopic camera as frames, the first switching means, the first transmitting means, A video signal from the main photographing camera via the second switching means, or a pair of signals via the first switching means, the first transmission means, the second switching means, and the first multi-video separating means. First display means for capturing a video signal from a stereoscopic camera and displaying a video image captured by the main camera or the pair of stereoscopic cameras; A stereoscopic image means for viewing an image captured by the pair of stereoscopic camera as a stereoscopic image, and a composite image field-synthesized by the second multi-image composition means via the second transmission means. Capture signals,
Second multi-video separation means for sequentially selecting and separating the composite video signals one field at a time and extracting video corresponding to the video signals from the respective background photographing cameras as frames, respectively. A multi-video display system comprising: second display means for capturing the video signals output after being separated into frames by the means and displaying the video images captured by the background shooting cameras. 2. The multi-video display system according to claim 1, wherein the pair of stereoscopic photographing cameras are arranged on both sides of the main photographing camera, respectively. 3. The multi-video display system according to claim 1, wherein the background photographing camera is composed of four cameras and is arranged above and below and to the left and right of the main photographing camera, respectively. 4. The pair of stereoscopic photographing cameras, wherein the first display unit takes in the image through the first multi-image separating unit when displaying the images photographed by the pair of stereoscopic photographing cameras. 4. The multi-video display system according to claim 1, 2 or 3, wherein the respective video signals from are displayed alternately. 5. The second display means is composed of four display means, and each display means is arranged above and below and on the left and right of the first display means, respectively.
Alternatively, the multi-image display system described in 4.