JPH0193978A - Stereoscopic video processor - Google Patents

Abstract

PURPOSE:To always cause a left side camera to be in a synchronizing coupling condition with the signal for synchronizing coupling of a right side camera and to erase the distortion of the synchronizing relation between right and left by field-converting a video signal to be delayed for one field scanning period. CONSTITUTION:A video signal L for left eye is directly inputted from a left side camera 1 to a contact (b) of a switch 3. As this result, when the contact of a switch 102 is connected to an (a) side, the signal L for left eye and a video signal R for right eye are directly inputted from the left side camera 1 and a right side camera 2 to both contacts (a) and (b) of the switch 3. When the contact of the switch 102 is connected to the (b) side, the video signal L for left eye to be directly from the left side camera 1 is inputted to the contact (b) of the switch 3 and a video signal R' to be delayed for one field scanning period, whose field scanning is converted, is inputted to the contact (a) of the switch 3. Thus, the distortion of a synchronizing signal is erased at a switching time and the switching at an arbitrary time point can be executed without interrupting a photographing.

Description

[Detailed Description of the Invention] <Industrial Application Field> Left eye and right eye video signals obtained by imaging a subject with left and right binocular parallax are alternately displayed on a video display device every one field scan. This relates to a three-dimensional image processing device for viewing three-dimensional images by placing optical shutters in front of the left and right eyes that open and close alternately on the left and right sides in response to field scanning of left-eye and right-eye image signals. be.

<Summary of the Invention> Left eye and right eye video signals obtained by imaging a subject with left and right binocular parallax are alternately displayed on a video display device for each field scan, In a 3D image processing device that views 3D images by placing optical shutters in front of the left and right eyes that open and close alternately on the left and right sides in response to field scanning of the image signals for the left and right eyes, One of the video signals is delayed by one field scanning period, and the field scanning is changed from an even field to an odd field.
Alternatively, the field scan is converted from an odd field to an even field, and the other video signal captured at the same timing is alternately displayed on a video display device or recorded on a video recording medium at the field scan period. In particular, the purpose is to improve the visibility of the recorded stereoscopic video signal as a stereoscopic video during special playback such as still playback.

Furthermore, the stereoscopic video processing device is provided with the functions of a normal stereoscopic video processing device that does not perform one-field scanning delay of one video signal and field scanning conversion, so that the former and the latter can be switched by a switching means such as a switch. To provide a stereoscopic video processing device that can smoothly switch functions without causing disturbance in the synchronization relationship between a left camera and a right camera when the stereoscopic video processing device is configured so that functions can be arbitrarily selected. It is.

<Prior art> In order to improve visibility when reproducing captured stereoscopic video signals, one of the captured video signals is delayed by one field scanning period and displayed on a video display device or recorded on a video recording medium. FIG. 3 shows an example of a conventional stereoscopic image processing device having the following functions and a function for reproducing normal stereoscopic images. The former one-field scanning period delay in the stereoscopic video processing apparatus in this embodiment is performed using the right eye video signal. Switching of functions is performed by switches 101 and 102 in the figure. 1 is the left camera, 2 is the right camera, and the output terminal 2r of the right camera 2 is connected to the one field scanning period delay circuit 8 and the contact a of the switch 102. Further, the output terminal 8r of the one-field scanning period delay circuit 8 is connected to the contact point of the switch 102. That is, the input contact of the switch 1020 receives the right-eye video signal R directly from the right camera 2 and the right-eye video signal R obtained by delaying the video signal R by one field scanning period, and selects one of them. and output. Furthermore, the switch 102
The output terminal 102t of the switch 3 is connected to the contact a of the switch 3. The other contact of switch 3 is the left camera 1.
The output terminal 1t of is directly connected. As a result, when the switch 102 is connected to the contact a side, both contacts asb of the switch 3 are connected to the left side 1. Since the video signals R for the left eye and for the right eye from the right camera 2 are directly input, on the other hand, if the switch 102 is connected to the contact side, the contact of the switch 3 is A left-eye video signal directly from the left camera 1 and a right-eye video signal R delayed by one field scanning period are input. The switch 101 is designed to be switched in conjunction with the switch 102, and when the contact of the switch 102 is connected to the a side, the contact of the switch 101 is also connected to the a side, and the switch 10
If the contact point 2 is connected to the b side, switch 10
1 contact is also connected to the b side. The switch 101 is a switch that selects the signal G for synchronous coupling of the left camera 2, and when it is connected to the contact a side, the left camera 1 enters the synchronous coupling state with the same timing as the right camera 2, and the side with the contact When connected to the left camera 1, the left camera 1 is in a synchronously coupled state with the one-field scanning period delay circuit 8. As a result, the left eye video signal R input to the switch 3 and the right eye video signal R are synchronized regardless of the positions of the contacts of the switch 101 and the switch 102. The left eye and right eye video signals R applied to the switch 3 by switching the contacts of the switch 3 alternately every one field scanning period are alternately switched to the output terminal 38 of the switch 3 every one field scanning period. It is output as a stereoscopic video signal S. Reference numeral 4 denotes a left/right switching signal generation circuit, which generates a left/right switching signal C for switching the contacts of the switch 3. The stereoscopic video signal S output from the output terminal 38 of the switch 3 is input to the video display device 5 and displayed, or is recorded by the video recording device 10. −
The left/right switching signal C outputted from the left/right switching signal generation circuit 4 is applied to the shutter drive circuit 6 as well as the switch 3 to open and close the optical shutter 7 alternately on the left and right sides every one field scan in synchronization with the stereoscopic video signal S. Reference numeral 11 denotes an inverting circuit for opening and closing the left and right shutters of the optical shutter 7 in opposite phases.

Next, switch 101. The operation when the contact point of the switch 102 is connected to the a side and when it is connected to the b@ side will be explained respectively.

First, switch 101. and the contact of switch 102 is a
The operation when connected to the side will be explained based on FIG. 4, which shows the state of field scanning.

The left eye video signal output from the left camera 1 and the right eye video signal R output from the right camera 2 shown in FIGS. , and from the output terminal 3s of the switch 3, a stereoscopic video signal S consisting of a left-eye video signal and a right-eye video signal R is alternately transmitted every one field scan as shown in FIG. 4(e). Output. The stereoscopic video signal S is input to the video display device 5 and displayed, or is recorded by the video recording device 10. The optical shutter 7 shown in FIG. 3 corresponds to the left and right images of the stereoscopic video signal S. Open and close. That is, when the right eye image is displayed on the image display device 5, the right shutter is in the open state and the left shutter is in the closed state, so that the right eye image is recognized only by the right eye.

Similarly, when a left-eye image is displayed on the image display device 5, the left-eye image is recognized only by the left eye. In this way, the stereoscopic video signal S displayed on the video display device 5 and imaged with left and right binocular parallax can be viewed with a stereoscopic effect.

Next, switch 101. The operation when the contact point of the switch 101. and the switch 102 is connected to the b side will be explained based on FIG. 5, which shows the state of field scanning. When the contact point of the switch 102 is on the b side, the right eye video signal R is delayed for one field scanning period by the one field scanning period delay circuit 8, and then alternately scanned for one field as shown in FIG. 4(c). 2 consecutive left eye video signals captured at the same timing.
The stereoscopic video signal S is applied to the video display device 5 and the video recording device 10 as a stereoscopic video signal S arranged during the field scanning period. Note that the operation of the optical shutter 7 is controlled by the above-mentioned switch 101. The contacts of the switch 102 are the same as those on the a side, and are opened and closed in response to the left and right images of the stereoscopic video signal S.

By viewing the image projected on the image display device 5 through the optical shutter 7, the projected image can be viewed with a three-dimensional effect. Furthermore, switch 101.
FIG. 5(d) shows the state of field scanning when the stereoscopic video signal S recorded in the video recording device 10 is still reproduced when the contact point of the switch 102 is on the b side.

As is clear from a comparison of the field scanning in FIG. 4(d) and FIG. 5(d), images are similarly recorded in the normal imaging method when the contacts of the switch 101° and the switch 102 are on the a side. FIG. 4(d) shows the state of field scanning when the stereoscopic video signal S is reproduced as a still image. Third
In the method shown in Figure (d), the imaging time goes backwards when performing still playback, whereas in the method shown in Figure 5(d), the imaging time does not go backwards during special playback. The sense of discomfort is reduced. On the other hand, in normal reproduction, the timing shown in FIG. 4(c) is more natural.

In this conventional example, the former and latter functions described above can be arbitrarily switched and selected using a switch.

<Problems to be Solved by the Invention> However, in the conventional three-dimensional image processing device described above, the switch 101. For a while after switching the contacts of the switch 102, the synchronization relationship between the left camera 1 and the right camera 2 is disrupted, making it impossible to obtain a normal stereoscopic video signal. This is because the synchronization coupling signal G selected by the switch 101 changes suddenly, and it takes time for the left camera 1 to be synchronized to a stable state. Therefore, there is a drawback that photographing must be temporarily interrupted when switching the contacts of the switch 101 and the switch 102.

Means for Solving Problems> The present invention provides means for delaying one of the imaged left-eye and right-eye video signals by one field scanning period; and a means for delaying the one field scanning period. means for converting the field scan of the video signal from an even field to an odd field or from an odd field to an even field; The video signal is displayed on a video display device or recorded on a video recording medium alternately at a field scanning period. Since the left camera can always be in a synchronous connection state using the same morning connection signal from the right camera, it is designed to eliminate disturbances in the left and right synchronization relationship.

<Example> Hereinafter, an example of the present invention will be described in detail based on FIGS. 1 and 2. FIG. 1 shows a block diagram of an embodiment, and FIG. 2 shows the time relationship of field scanning of a video signal. Here, the same numbers and symbols in the figures are used for the same parts as in FIGS. 3, 4, and 5. 1st
In the figure, 1 is a left camera, and 2 is a right camera. The left camera 1 and the right camera 2 are in a synchronously coupled state, and the phases of the synchronization signals of the left eye and right eye video signals R are aligned. The output terminal 2r of the right camera 2 is 1F.

Yield scan period delay circuit 8. and is connected to contact a of switch 102. In the one-field scanning period delay circuit 8 , the right-eye video signal R is delayed by one field scanning period and is input to the field scanning conversion circuit 201 . The field scan conversion circuit 201 converts the field scan of the right eye video signal R from an even field to an odd field or from an odd field to an even field. As a result, the direct right eye video signal R from the right camera 2 is transferred to the contact a of the switch 102.
The right eye video signal R', which is obtained by delaying the right eye video signal R by one field scanning period and undergoing field scanning conversion, is input to the second contact. The switch 102 selects one of the two input right-eye video signals RR' and outputs it to the contact a of the switch 3. The left eye video signal from the left camera 1 is directly input to the other contact of switch 3, and as a result, switch 1
When the contact 02 is connected to the a side, both contacts a and b of the switch 3 are connected to the left side 1. When the left eye and right eye video signals R from the right camera 2 are directly input and the contact of the switch 102 is connected to the b side, the contact of the switch 3 is connected to the left eye camera 1. In addition to the direct left-eye video signal R', the right-eye video signal R', which has been delayed by one field scanning period and whose field scanning has been converted, is input to contact a of the switch 3.

Next, the temporal relationship of each video signal will be explained based on FIG. FIGS. 2(a) and 2(b) show a left eye video signal R and a right eye video signal R directly output from the right camera, respectively. The part marked “odd” in the figure is an odd field.
The portion marked "even" indicates an even field. FIG. 2(bl) shows the right eye video signal R delayed by one field scanning period. If the video signals of (a) and (b,) in Fig. 2 are output alternately every one field scanning period, a stereoscopic video signal S suitable for still playback should be obtained, but (a) and (b) , ) are output alternately, either a series of odd fields or a series of even fields will result, which will not result in a normal stereoscopic video signal. Therefore, in this embodiment, after a delay of one field scanning period, field scanning conversion is performed to obtain the right eye video signal R' shown in FIG. 2(b2). Figure 2 (c2) shows the video signals of Figure 2 (a) and (b2) that are output alternately every one field scanning period.
), which corresponds to the operation when the contact of the switch 102 is on the b side in FIG. The stereoscopic video signal S' shown in Figure 2 (C,) is a video signal in which left and right images taken at the same timing are recorded in two consecutive field scanning periods, and the field scanning relationship is also normal. There is. FIG. 2(d) shows a reproduced image when the stereoscopic video signal S' of (c2) is reproduced as a still, and there is no reversal of the imaging time even during still reproduction. The stereoscopic video signal S in FIG. 2 (cl) is (a).

The left-eye and right-eye video signals R shown in (b) are output alternately every one field scanning period, and a stereoscopic video signal suitable for normal playback can be obtained.

Note that the operation of the optical shutter is not different from that of the conventional example, and as described above, the stereoscopic video processing device of the present invention can combine a stereoscopic video signal suitable for normal playback and a stereoscopic video signal suitable for special playback such as still playback with one stereoscopic video processing device. It is possible to select and output stereoscopic video signals. Moreover, since there is no disturbance in the synchronization signal during the switching, switching can be performed at any time without interrupting photography.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the stereoscopic image processing device of the present invention, and FIG.
3 is a block diagram of a conventional three-dimensional image processing device, and FIGS. 4 and 5 are diagrams showing how a field scans a video signal according to the present invention. FIG. 3 is a diagram showing a state of field scanning. DESCRIPTION OF SYMBOLS 1... Left camera, 2... Right camera, 3... Switch, 4... Left/right switching signal generation circuit, 5... Video display device, 6... Shutter drive circuit, 7... Optical shutter, 8...1 field scanning period delay circuit, 1
o...Video recording device, 11...Inversion circuit, 101,
102...Switch, 201...Field scanning conversion circuit Agent Patent attorney Takeshi Sugiyama (and 1 other person) 2nd figure

Claims (1)

[Scope of Claims] 1. Left eye and right eye video signals obtained by imaging a subject with left and right binocular parallax are alternately displayed on a video display device for each field scan, In a 3D image processing device that views 3D images by placing optical shutters in front of the left and right eyes that open and close alternately on the left and right sides in response to field scanning of image signals for the left and right eyes, means for delaying one of the video signals for one field scanning period; and means for delaying one field scanning period of the video signal for one field scanning period from an even field to an odd field or from an odd field to an even field. means for converting the field scan and the field scan; and a means for displaying the other video signal captured at the same timing as the video signal converted from the field scan on a video display device or on a video recording medium alternately at the field scan period. A stereoscopic image processing device characterized by recording.