JPS63215283A - Stereoscopic image photographing and recording device - Google Patents

Abstract

PURPOSE:To save an editing cost by using a field selector to decide odd and even fields and recording a stereoscopic image on one set of a video recording device automatically through a changeover at each field thereby eliminating the need for consideration to synchronize two channels in editing a finished video recording tape. CONSTITUTION:The field selector 30 receives a video signal of two cameras 2a, 2b and selects the signal in the unit of fields alternately to output one video image. A video recording device 4 receives a video signal from the field selector 30 and records the signal on one magnetic tape. The monitor 40 includes a monitor television 41, a shutter offset screw driver 42 and a shutter spectacle 43, receives the video signal from the field selector 3 and visualizes it for stereoscopic vision. Thus, in applying a conventional edition, it is not required to care about the synchronization of the left/right video images in the succeeding edit and reproduction processing.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a photographing and recording device for stereoscopically displaying images photographed by a video camera.

<Prior Art> Conventionally, the most common method for photographing actual scenery with a television camera and displaying it three-dimensionally is as shown in FIG.
Two systems of playback devices 6a and 6b and projectors 8a and 8b are provided, and two images are simultaneously projected onto the screen 10 while being completely synchronized. At this time, the lens surfaces of the projectors 8a and 8b were attached at angles perpendicular to each other (intranasal glass or deflection filter 1
2a and 12b separate the left and right images, and a person uses deflection glasses 14 to separate the left and right images and view the images with both eyes to obtain a stereoscopic image.

Also, recently, using the principle that one television frame that makes up one screen every 1730 seconds scans the screen twice every 1760 seconds, in an odd field and an even field.
There is a stereoscopic display method that switches and displays left and right images every 1760 seconds. That is, as shown in FIG. 2, video images taken synchronously by television cameras 2a and 2b are recorded by recording devices 4a and 4b onto a magnetic tape 16a for the right eye and a magnetic tape 16b for the left eye, respectively. In this case, the right eye magnetic tape 16a includes odd fields R, , R21, R, , . . . and even fields R+□, R2□+R)2+, as shown in FIG. 2a. ... is recorded on the left eye magnetic tape 16b, and an odd field L + + + L 21 is recorded on the left eye magnetic tape 16b.
1 L 3+ +..., and even field L, 2.
The left eye video signal (b
) are recorded.

In the editing work, as shown in the time chart of FIG. 2a, a video for the right eye is created from the recording signals of the magnetic tapes 16a and L6b, that is, the video signal for the right eye (a) and the video signal for the left eye (b). The signal includes odd fields R11, R2
1, R31, ..., even field L1□ for the left eye
, L 2 □ + L 32 + . . . and each odd field and even field constitute one frame to obtain a video signal (c). If the magnetic tape 16c containing this video signal (c) is played back by the playback device 6c and displayed on the monitor television 18, a video from a different viewpoint will be displayed every 1760 seconds, and the person viewing this will see the left and right images. It appears that the images are displayed as duplicates at the same time. In order to view this stereoscopically, shutter glasses 22 are used which are connected to the reproduction device W 6 e via a shutter driver 2o. In these shutter glasses 22, the passage of light is controlled alternately on the left and right sides every 1760 seconds in synchronization with the playback signal from the playback device 6c, and when an image of the left eye is displayed, the shutter 22a of the shutter glasses 22 opens. , when the right eye image is displayed, the shutter 22b opens, and in this way stereoscopic vision can be obtained.

<Problems to be solved by the invention> In the conventional stereoscopic imaging display system, two recording devices are required because the left and right sides are photographed and recorded separately, which means that two systems of equipment are required for recording. In addition to this, it is also necessary to completely synchronize each other and match the characteristics of the two systems of equipment, which is disadvantageous and requires a lot of time and effort.

Also, at the reproduction stage, in the method described in FIG. 1, two reproduction devices must be provided and perfectly synchronized. In the method explained in Fig. 2, only one playback device is required, and there is no synchronization during playback, but during editing in the previous stage, one field is extracted alternately from the left and right tapes to create a single tape. The editing process is extremely time-consuming and expensive.

Furthermore, photography is usually performed outdoors in many cases, and when photography is performed outdoors in this way, it is impossible for both methods to proceed with photography while immediately checking whether the three-dimensional effect is good or not. This is because three-dimensional editing and reproduction cannot be easily performed outdoors.

This invention was made to solve the above-mentioned problems, and it records images from two television cameras into one recording device, and avoids the special processing required due to the three-dimensional screen that occurs during the editing stage. To provide a three-dimensional image photographing and recording device which eliminates any editing work, has a monitor configured so that a three-dimensional effect can be checked immediately at the time of photographing, and can easily and economically obtain high-quality three-dimensional images. The purpose is to

<Means for Solving the Problems> In the present invention, a device for alternately switching and selecting two input video signals field by field and obtaining one video signal is connected to two cameras for stereoscopic imaging. I am trying to connect it to one recording device. Furthermore, a monitor device is provided so that the obtained video signal can be viewed stereoscopically immediately.

According to a specific aspect of the present invention, in a stereoscopic image photographing and recording device that obtains a three-dimensional image by synchronizing and simultaneously photographing two television cameras, The video signals are simultaneously input and the changing points of the odd and even fields of the video signals are detected, and based on the detected changing points, only the odd fields are selected from one of the video signals of the television camera and the other is selected. A field selector that selects only even fields from a video signal of a television camera and outputs it as one video signal, and one recording device that records one video signal from this field selector. A three-dimensional image photographing and recording device is provided.

Effects> In this invention, when two field signals constituting one frame of a video signal are input, it is correctly determined whether the field is an odd field or an even field, and the odd and even fields are alternately determined from the two field signals. Select even field and press 1
The video signal is recorded on the main video channel 1, and in order to achieve this effect, the property of the equivalent pulse that exists near the vertical synchronization signal in the video signal is utilized.

<Example> An embodiment of the present invention will be described below.

In FIG. 3, a field selector 30 inputs video signals from two cameras 2a and 2b, alternately selects each field, and outputs one video.

This field selector 30 can be configured with an electronic device such as an IC, and if configured with such an IC device,
It is possible to manufacture the entire device extremely compactly. The recording device 4 inputs the video signal from the field selector 30 and records it on one magnetic tape. The monitor device 4o includes a monitor television 41, a shutter glasses driver 42, and shutter glasses 43, receives the video signal from the field selector 30, converts it into an image, and views it stereoscopically.

FIG. 4 specifically shows the internal configuration of the field selector 30, where 31 is a distributor that supplies the video signal of the right TV camera 2a to multiple devices, and 32 detects a synchronization signal in the video signal. 33 is an equivalent pulse separator that detects and separates equivalent pulses included in synchronous separation; 34 is a counter that counts equivalent pulses; 35 is a timing generator; 36 is a unit that identifies an odd field and displays an image of that field. The odd field determiner 37 outputs a signal during the period when the signal is input to the video camera 2a.
and 2b to obtain one video signal.

As shown in FIG. 6, a vertical blanking period Te of the television waveform includes a vertical synchronizing pulse Tv and an equivalent pulse Teq.
It is included. There is the following relationship between the first field (odd field) Fo on which interlaced scanning is performed and the next field (even field) Fe.

That is, in odd-numbered fields Fo, vertical blanking starts in phase with horizontal blanking, and in even-numbered fields Fe, vertical scanning starts at the midpoint of the horizontal scanning of the video signal, and vertical blanking starts from this point. The horizontal scanning line is skipped.

Focusing on the fact that the start of horizontal scanning is shifted by 172 of the horizontal scanning period between the odd field Fo and the even field Fe, we developed a method to distinguish between odd and even fields using the method described below. get a signal,
This discrimination signal was used to alternately switch the video output signals of the two cameras on a field-by-field basis, so that the video signal from camera 2a was used as the odd field, and the video signal from camera 2b was used as the even field. One video signal can be obtained.

In FIG. 4, the video signal (&) of camera 2a (second
Refer to (a) in figure a). First, in order to completely synchronize the two cameras, the camera 2 is connected via a wire from the distributor 31.
A synchronizing signal is given to b. This is a method commonly used in professional televisions and cameras, so the details are omitted here.

The video signal (a) is also supplied via line L2 to a field determination unit 30a that determines whether the block enclosed by the chain line, that is, the field, is an odd number or an even number.

The video signal (a) given to the field determination section 30a via the line L2 is first input to the sync separator 32,
This sync separator 32 removes the video signal from the video signal (a) and separates and outputs only the sync signal. This synchronous waveform signal is shown as (b) in FIG. In the synchronization waveform signal (b), if we pay attention to the equivalent pulse Teq that exists before the vertical synchronization signal TV, we can see that the sixth pulse in the number given to the synchronization waveform signal (b) is in the odd field Fo and the even field Fe. The waveforms are different. That is, in the sixth pulse of the odd field Fo, the low potential "L"
While the time width of the high potential "L" is long and the time width of the high potential "L" is short,
In the 6th pulse of even field Fe, the high potential r)
(The time width of J is long and the time width of low potential "L" is short.

Therefore, the following circuit in the field determining section 30a focuses on this difference to determine odd fields and even fields.

Since the period of the equivalent pulse Teq in the synchronization signal (b) is 172 times the period of the horizontal synchronization signal, the next equivalent pulse separator 33 takes out only the equivalent pulse Teq using the lump property. The number of equivalent pulses Teq is counted, and only the sixth numbered waveform (b) in FIG. 5 is output to obtain the waveform (d) in FIG. Furthermore, the timing generator 35 delays the rise of the waveform (d) by a time t and shortens the pulse width to create the waveform (e).
get. By delaying by time t, waveform (e)
is a short pulse that occurs near the center of the sixth pulse of waveform (b) in both odd and even fields.

In this way, waveform (e) is a pulse that occurs in both odd and even fields, but if we construct an AND circuit with waveform (b), waveform (eo
), pulses are generated only in odd fields. Furthermore, if an AND circuit is constructed between the negation of waveform (b) and waveform (e), a pulse will be generated only in an even field as shown in waveform (e"). Therefore, waveform (
If the odd field determiner 36 is configured so that the pulse of eo) is the starting point of the odd field and the waveform (e'') of the next even field is the end of the odd field, the output of the odd field determiner 36 is A waveform (f) is obtained as follows.The video signals from the cameras 2a and 2b are input to the video switcher 37, which is a high-speed analog switching circuit, and the switching is controlled by the output signal (f) of the odd field determiner 36. If so, a signal is obtained in which the video signal of camera 2a is alternately arranged in odd fields and the video signal of camera 2b is arranged in even fields.

If the output signal of the field selector 30 obtained as described above is recorded in the recording device 4- and normal editing operations are performed, there will be no need to worry about synchronizing the left and right images in the subsequent editing and playback steps. In addition, when shooting, adjustments are made to maximize the three-dimensional effect, such as the distance between the two cameras, parallelism, and focusing of the zoom lens. Field selector 30
The output signal is connected to the monitor device 40 so that the image on the monitor television 41 can be viewed through shutter glasses 43, so that the three-dimensional image can be immediately monitored. The shutter glasses 43 are devices using liquid crystals whose transparency can be changed by applying a voltage, and the shutter glasses driver 42 controls the glasses 43 by determining the field.

The shutter glasses driver 42 is connected to the field selector 30.
The circuit configuration may be the same as the chain line part, that is, the circuit configuration of the field determination unit 30a consisting of the synchronous separator 32, the equivalent pulse separator 33, the counter 34, the timing generator 35, and the odd field determiner 36. is correctly determined, and the shutter glasses 4 are
Drive by switching 3 from left to right.

<Effects of the Invention> As described above, according to the present invention, the field selector determines an odd field and an even field, thereby switching two video signal inputs for each field, and automatically outputting stereoscopic data to one recording device. Since images are recorded, there is no need to consider synchronizing the two channels when editing the completed recording tape, resulting in a significant reduction in editing costs.

Furthermore, since only one recording device is required, the amount of various auxiliary equipment can be halved, which is extremely advantageous when considering portability in outdoor photography and the like.

Another important effect is that if the output signal of the field selector 30 is also connected to the monitor device 40 and shutter glasses are prepared at the time of shooting, the 3D image can be monitored in real time, making it easy to check whether the 3D image is good or bad at the shooting stage. One example is that it can be confirmed.

Further, since the field selector can be easily constructed using electronic elements such as ICs, the entire device can be manufactured in an extremely small size.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram for explaining a simultaneous display 3D display method according to the prior art, and FIG. 2 is a block configuration diagram for explaining a time division 3D display method according to another prior art.
FIG. 2a is a timing chart for explaining the operation of FIG. 2, FIG. 3 is a block diagram showing a stereoscopic image photographing and recording apparatus according to an embodiment of the present invention, and FIG. 4 is a field diagram of FIG. Block circuit diagrams showing the selector in detail, FIGS. 5 and 6, are timing charts for explaining the operation of FIG. 4. In the figure, 2a and 2b are television cameras, 4 is a recording device, 30 is a field selector, 31
is a distributor, 32 is a synchronous separator, 33 is an equivalent pulse separator, 34 is a counter, 35 is a timing generator, 36 is an odd field determiner, 37 is a video switch, 40 is a monitor device, 41 is a monitor television, 42 is a shutter glasses driver, and 43 is shutter glasses. Patent applicant Mitsubishi Precision Co., Ltd. Figure 1 Figure 2 Figure 2o

Claims (2)

[Claims] (1) In a stereoscopic image recording device that obtains a stereoscopic image by synchronizing two television cameras and simultaneously capturing images, the video signals from the two synchronized television cameras are simultaneously input and The changing points of the odd and even fields of the video signal are detected, and based on the detected changing points, only the odd fields are selected from the video signal of one of the television cameras, and the odd fields are selected from the video signal of the other television camera. A stereoscopic image characterized by comprising: a field selector that selects only even fields and outputs them as one video signal; and one recording device that records one video signal from the field selector. Photography and recording equipment. (2) A monitor device connected to the field selector and configured to simultaneously project the one video signal from the field selector, the monitor device being connected to a monitor on which the one video signal is projected. A television, shutter glasses whose right and left halves are alternately transparent and opaque for each odd field and even field of the video signal, and detecting a change point in the odd field and even field of the video signal. The stereoscopic image photographing and recording apparatus according to claim 1, further comprising a shutter glasses driver that switches the right half and the left half of the shutter glasses between transparent and opaque at each change point.