JP2656254B2 - Video signal generator for stereoscopic images - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a three-dimensional image video signal generating apparatus for alternately displaying a right-view signal and a left-view signal to obtain a three-dimensional image.

(Prior Art) Conventionally, in order to obtain a stereoscopic image in this type of system, the same subject is imaged by a plurality of, for example, two television cameras arranged at a predetermined distance from each other, and a right and right video signal is obtained. , And the left and right video signals obtained from each television camera are alternately switched and supplied to the same television receiver alternately and continuously to display the left and right images alternately. On the other hand, the user wears liquid crystal glasses, turns on and off the visual field of the left and right eyes with the glasses, and sees the left image with the left eye and the right image with the right eye to form a stereoscopic image. You can see.

However, the stereoscopic television system as described above has a drawback in that it is necessary to take an image of the same subject using two television cameras to produce a stereoscopic image, and it takes time and effort to produce the stereoscopic image. Further, there is a demand for the development of a device that can easily and quickly produce a non-existent scene created by creation, a large-scale powerful scene, and a computer-created three-dimensional image such as animation or cartoon.

(Problems to be Solved by the Invention) In a conventional three-dimensional television system, a video signal for displaying a three-dimensional image cannot be obtained unless two existing television cameras actually shoot an existing subject. There is a drawback that it takes time and effort to shoot a scene or animation to be created. In view of the above drawbacks, an object of the present invention is to provide a video signal generator for a stereoscopic image that can generate a video signal for displaying a stereoscopic image without photographing an existing subject with two cameras. And

[Structure of the Invention] (Means for Solving the Problems) The stereoscopic image video signal generating device of the present invention indicates a right-view image signal representing a right-view image and a depth of the right-view image. Right image output means for outputting right depth information; left image output means for outputting a left-view image signal representing a left-view image and left-depth information indicating the depth of the left-view image; A right delay unit for outputting a right-view delay signal obtained by delaying the image signal for use in accordance with the right depth information, and a direction opposite to the right delay unit in response to the left-view image signal in accordance with the left depth information. And a synthesizing unit that alternately switches and synthesizes the right-view and left-view delay signals for each screen.

(Function) In the stereoscopic image video signal generating device of the present invention, the right-view image output means includes a separately created right-view image signal representing a right-view image and depth information indicating the depth of the right-view image. To the right image delay means. The right image delay means generates a right-view video signal by delaying the input right-view image signal by a time corresponding to the depth information of the simultaneously supplied signal, and outputs the right-view video signal to the video synthesizing means. On the other hand, the left-view image output means outputs to the left image delay means a left-view image signal representing a separately prepared left-view image and depth information indicating the depth of the left-view image. The left image delay means
The input left-view image signal is delayed in the direction opposite to the right-image delay means for a time corresponding to the depth information provided at the same time to produce a left-view video signal and output it to the video synthesizing means. . The video synthesizing means outputs a stereoscopic video signal obtained by alternately switching the right-view video signal and the left-view video signal for each field and combining them.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing an embodiment of a three-dimensional image video signal generator according to the present invention. 1 is a right-view image signal 100
A right-view image output circuit for outputting a left-view image signal 20
Left-view image output circuit that outputs 0, 3 is right-view image signal 1
A variable delay line for delaying 00 based on the depth information voltage value 51, a variable delay line for delaying the left-view image signal 200 based on the depth information voltage value 61, and 5 for converting the depth information into a corresponding voltage value. 6 is a variable delay line.
A switching circuit 7 for alternately switching between the right-view and left-view video signals 300 and 400 output from the controller and outputting a stereoscopic video signal 500, and a synchronization signal generating circuit 7 for generating a switching timing signal of the switching circuit 6.

Next, the operation of this embodiment will be described. First, a right-view image and a left-view image are created in advance together with depth information of each image. The right-view image signal 100 is output from the right-view image output circuit 1 and the left-view image signal 200 is output from the left-view image output circuit 2 together with image depth information 50 and 60, respectively. The right-view and left-view image signals 100 and 200 are output to the variable delay lines 3 and 4, and depth information representing the depth of the right-view and left-view images.
50 and 60 are output to the depth information generating circuit 5. The depth information generating circuit 5 converts the input depth information 50, 60 into a corresponding voltage value 5
1, and outputs these voltage values to the variable delay lines 3 and 4. The variable delay line 3 delays the input right-view image signal 100 by a delay time based on the voltage value 51 corresponding to the depth of the image to form a right-view video signal 300, and outputs this to the switching circuit 6. I do. The variable delay line 4 delays the input left-view image signal 200 by a delay time based on the voltage value 61 corresponding to the depth of the image to form a left-view video signal 400, which is output to the switching circuit 6. I do. In the switching circuit 6, switching is performed by the vertical index signal input from the synchronization signal generating circuit 7, and odd fields are converted to the right-view video signal 300.
Then, a video signal 500 for a stereoscopic image in which the even field is composed of the left-view video signal 400 is created and output. The video signal 500 is a normal NTSC signal, and is a field-sequential stereoscopic image signal in which a right-view image signal and a left-view image signal are switched for each field. Here, the operations of the variable delay lines 3, 4 for generating the right-view and left-view image signals 300, 400 and the depth information generating circuit 5 will be described in more detail. The right-view and left-view image output circuits 1 and 2 output the depth information of the subject, that is, the depth information of the image, for example, when the subject is 1 m away or 2 m away, to the depth information generation circuit 5. The depth information generating circuit 5 generates a DC voltage corresponding to the input depth information, that is, the distance to the subject, and outputs the DC voltage to the variable delay lines 3 and 4. Variable delay lines 3, 4
Delays the right-view and left-view image signals 100 and 200 inputted with a delay time as shown in FIGS. 2A and 2B corresponding to a given DC voltage, that is, a distance to a subject. , And produces video signals 300 and 400 for right and left viewing. At this time, when the distance to the subject is 1 m, the right-view image signal advances by Δt ₁ as shown in FIG. 2A, and the left-view image signal advances as shown in FIG. 2B. variable delay line so they Δt ₁ delayed
3 and 4 are controlled, and the positions of the right-view image and the left-view image are greatly shifted left and right. On the other hand, when the distance to the subject is 5 m or more, as shown in FIGS.
The left-view image signals are each delayed by Δt ₂ , and the distance between both images to the left and right is reduced. Therefore, the variable delay line 3,
The right-view and left-view video signals 300 and 400 output from 4 have the same characteristics as the signals obtained by photographing the same subject with two cameras. For this reason, the video signal 500 for a stereoscopic image generated by combining the signals 300 and 400 by the switching circuit 7 is displayed on a monitor or the like, and the image based on the video signal 300 for the right view is viewed with the right eye, and the image based on the video signal 400 for the left view is displayed. If you can observe with your left eye using liquid crystal shutter glasses,
You can watch powerful 3D television images.

According to the present embodiment, the right-view image signal and the left-view image signal created in advance by the variable delay lines 3 and 4 are delayed according to the depth information 50 and 60 (voltage values 51 and 61) which are simultaneously given. Thus, it is possible to generate right-view and left-view video signals 300 and 400 equivalent to signals obtained by photographing the same subject with two television cameras. Therefore, it is possible to easily and quickly create a video signal for displaying a stereoscopic image without photographing an existing subject with two cameras. Therefore, a video signal for a three-dimensional image can be created easily and in a short time from an image such as a computer animation using the above-described device. Further, it becomes possible to easily and inexpensively create and provide a video signal for a three-dimensional image such as a NES for a three-dimensional image or a game machine.

[Effects of the Invention] As described above, according to the video signal generating apparatus for a stereoscopic image of the present invention, there is an effect that a video signal that outputs a stereoscopic image without photographing an existing subject with two cameras can be generated. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a three-dimensional image video signal generating apparatus according to the present invention, and FIG. 2 is a diagram for explaining the operation of the variable delay lines 3 and 4 shown in FIG. DESCRIPTION OF SYMBOLS 1 ... Right-view image output circuit 2 ... Left-view image output circuit 3, 4 ... Variable delay line, 5 ... Depth information generation circuit 6 ... Switching circuit, 7 ... Synchronization signal generation circuit

Claims (1)

(57) [Claims] 1. Right image output means for outputting a right-view image signal representing a right-view image and right-depth information indicating a depth of the right-view image, and a left-view image representing a left-view image. A left image output unit that outputs an image signal and left depth information indicating a depth of the left-view image; and outputs a right-view delay signal obtained by delaying the right-view image signal according to the right-depth information. A right delay unit, a left delay unit that outputs a left-view delay signal in which the left-view image signal is delayed in a direction opposite to the right delay unit in accordance with the left-depth information; Synthesizing means for alternately switching the left-view delay signal for each screen and synthesizing the signals.