JPH0666972B2 - Stereoscopic color television - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stereoscopic color television device, and is intended to improve color signal processing of an image presented alternately to the left and right eyes.

[Prior Art] Generally, in order to perceive a stereoscopic color image, a color image having binocular parallax must be separately presented to the left eye and the right eye, but in this case, the left eye and the right eye. It is not always necessary to present a color image to each of the two, and even if one of the images presented to the left eye and the right eye is replaced with a monochrome (black and white) image, it is perceived as a color stereoscopic image.

Applying this principle, conventionally, for example, a color image for the left eye,
After making a monochrome image for the right eye, pasting a polarizing filter on the entire surface of each CRT (display device) for the left and right eye images, and combining the left and right eye images with half mirror,
A method of observing with stereoscopic glasses using stereoscopic glasses was considered.

[Problems to be Solved by the Invention] However, a conventional method of observing with a pair of left and right eye images as a color image and the other as a monochrome image and combining them with a polarizing filter and a half mirror to observe with polarizing glasses is However, not all observers can perceive a stereoscopic color image, but some observers cannot perceive a stereoscopic color image.

The reason for this has not yet been fully clarified,
The following reasons are possible.

According to the conventional method, for example, a color image for the left eye and a monochrome image for the right eye are presented at the same time. Therefore, a phenomenon called "between different colors binocular rivalry" occurs between the left eye and the right eye. This phenomenon is particularly noticeable in the anaglyph method in which stereoscopic vision is performed using glasses with different red and blue colors for the left and right eyes. It is a phenomenon in which the image looks very unstable by being visible or appearing as a blue image.

Further, depending on the observer, there are some people whose right eye works more dominantly than the left eye as an individual difference, and some people have the opposite. In general,
When stimuli with extremely different properties such as colors and figures are presented to the left eye and the right eye at the same time for stereoscopic viewing, the appearance becomes extremely unstable and individual differences in stereoscopic viewing are increased.

For this reason, although experiments have been conducted with the conventional system, they have not reached the stage of being practically used as a stereoscopic color television system.

Therefore, an object of the present invention is to solve the above-mentioned problems, and to present one of the left and right eye images as a color image and the other as a monochrome image, all observers always have a stable stereoscopic image. An object of the present invention is to provide a stereoscopic color television device capable of perceiving a color image.

[Means for Solving Problems] In order to achieve such an object, in the present invention, for example,
A color image is alternately presented to one of the left and right eyes and a monochrome image is presented to the other eye at predetermined time intervals.

That is, the present invention sequentially displays left-eye and right-eye images in a time-divisional form, and synchronizes with the display cycle to alternately open and close the optical shutters arranged in front of the left and right eyes. In the three-dimensional color television system that presents the left-eye and right-eye images corresponding to the left-eye and the right-eye, respectively, one of the left-eye and right-eye images is captured in color and the other is monochrome. A first image displayed by a luminance signal captured by color imaging and a signal obtained by amplifying a color signal and a second image captured by monochrome imaging are alternately displayed on the left eye and the right side. It is characterized in that it is presented to one and the other eye in a time-division manner at a predetermined cycle.

[Operation] According to the present invention, a stimulus having different properties such as a color image having a color component in one of the left and right eyes and a monochrome image in the other eye is alternately time-divided at predetermined time intervals. It is possible to avoid the phenomenon of binocular rivalry between different colors described above.

EXAMPLES The present invention will be described in detail below with reference to the drawings.

First, as an embodiment of the present invention, for example, an image for the left eye is captured by a color television camera, and an image for the right eye is captured by a mochrome television camera. An embodiment of how the color signal and the luminance signal for the right eye are distributed and presented to the left eye and the right eye is shown in Tables 1 (A), (B) and (C).

In the table, Y indicates a luminance signal, C and C ′ indicate a color signal, and subscripts L indicate a signal corresponding to the left image and R indicates a signal corresponding to the right image. Further, C _W represents a wideband component of a color signal in high definition television, and C _N represents a narrowband component of a color signal in high definition television.

In Table 1 (A), an image based on the luminance signal Y _L and a signal C _L ′ obtained by amplifying a color signal is presented as left eye information, and an image based on the luminance signal Y _R is presented as right eye information.

Table 1 (B) shows luminance signal Y _L and color signal C as left eye information.
_An image is presented by _L and the luminance signal Y as the right eye information.
_An image is presented by _R and the color signal C _{L of the} left eye information.

Table 1 (C) presents an image of the luminance signal Y _L as the left-eye information and the broadband component C _W of the color signal in the high definition television, and the luminance signal Y _R as the right-eye information and the high-level of the left-eye information. An image is presented by the narrow band component C _N of the color signal in a quality television.

(First Embodiment) FIG. 1 is a system diagram showing a configuration of a first embodiment according to the system shown in Table 1 (A) of the present invention.

In the figure, 1 and 2 are input terminals, and a color video signal from the left-eye imaging camera is input from the input terminal 1,
A monochrome video signal from the imaging camera for the right eye is input from the input terminal 2.

3 is a Y / C separation circuit, which converts the color video signal to the luminance signal Y _L
And the color signal C _L. Reference numeral 4 is an amplifier, and 5 is an adder.

6 is a color signal demodulation circuit, 7 is a signal distribution circuit, and 8A, 8B and 8C are switching circuits. 9 is a color CRT (display device), and 10 is liquid crystal (electronic shutter) glasses.

11 is a periodic signal generation circuit, 12 is a switching pulse generation circuit, in synchronization with the scanning of the television camera, switching control of the switching circuit 8A, 8B and 8C the left and right eye video signals at a desired speed, Generates a pulse for controlling switching between the left and right shutters of liquid crystal glasses.

In the first embodiment, a color image pickup camera is used for the left eye camera, and a monochrome image pickup camera is used for the right eye camera.
These cameras are based on current television standards.

The left-eye image of the luminance signal Y _L and the color signal C _L from the left-eye color imaging camera and the right-eye image of the luminance signal Y _R from the right-eye monochrome imaging camera are time-divided alternately. To be presented.

The operation of FIG. 1 will be described below.

The video signal from the left-eye color imaging camera is input from the input terminal 1, and the Y / C separation circuit 3 temporarily outputs the luminance signal Y _L and the color signal C.
Separated into _L.

The color signal C _L is amplified to a desired level by the amplifier 4 and added to the adder 5. In the adder 5, the luminance signal Y _L and the color signal amplified by the amplifier 5 are combined and added to the color signal demodulation circuit 6.

The color signal demodulation circuit 6 uses the luminance signal Y _L and the amplified color signal.
C _L and R are converted into three primary color signals of R, G and B, and switching circuit 8A,
Supply to one terminal of 8B and 8C respectively.

On the other hand, the video signal Y _R from the monochrome imaging camera for the right eye
Is input from the input terminal 2. The video signal Y _R is divided into 3 by the signal distribution line 7 and supplied to the other terminals of the switching circuits 8A, 8B and 8C, respectively.

A desired switching pulse is generated from the switching pulse generation circuit 12 in synchronism with the synchronization signal from the synchronization signal generation circuit 11, and switching circuits 8A, 8B and 8C are switched, and left eye color 3 primary color signals R, G and B are generated. Monochrome signal Y for right eye
Switch between _R , Y _G and Y _B and supply to color CRT9. In addition, the switching pulse controls the left and right shutters of the liquid crystal glasses 10 so that the left-eye image and the right-eye image are color-coded alternately in time division for the left eye and the right eye.
Presented at CRT9.

(Second Embodiment) FIG. 2 is a system diagram showing a configuration of a second embodiment according to the system of Table 1 (A) of the present invention.

In the figure, the same parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. In FIG. 2, 13 is a field memory, 14 is a color demodulation circuit, 15 is a signal distribution circuit, 16 is a synchronization signal generation circuit, and 17 is a switching pulse generation circuit.

The operation of FIG. 2 will be described below.

The input signal from the camera for the left eye is separated into the luminance signal Y _L and the color signal C _L by the Y / C separation circuit 3, and then the color signal C _L is amplified by the amplifier 4 to the level of the color signal C _L. After that, the adder 5 adds the luminance signal Y _L again, and the field memory 13
The color demodulator 14 converts the signals into the three primary color signals of R, G and B.

On the other hand, the luminance signal Y _R from the right-eye camera is double-speed scan converted by the field memory 13 and distributed to three outputs by the signal distribution circuit 15 and then 1/1 with the R, G, B3 primary color signals described above.
It is rewritten every 20 seconds and supplied alternately to the color CRT9.
This color CRT9 has a scanning speed of 2 in the current television system.
It operates at double horizontal scanning 31.5 KHz and vertical scanning 120 Hz, and a color image and a monochrome image are alternately presented on the screen every 1/120 second, and the liquid crystal (electronic (Shutter) Wear glasses 10 and observe (stereoscopic).

In the second embodiment shown in FIG. 2, the signal Y _L + C _L from the left-eye color imaging camera and the signal Y _R from the right-eye monochrome imaging camera are once written into the field memory 13, Input signal 2 for both horizontal and vertical scanning
Reads at double scanning speed (1/120 sec for vertical). As a result, an image can be presented to one eye at an interval of 1/60 second, and thus a stereoscopic color image without flicker can be observed.

In the above-described first and second embodiments, the color information causes the stimulus to be applied to only one eye by one of the image pickup cameras, and the saturation of the color of the image is insufficient.

In order to correct this, the Y / C separation circuit 3 amplifies the level of the color signal Y / C separated and taken out by 2 to 3 dB. FIG. 3 is a characteristic diagram of the result of image quality evaluation by a plurality of subjects with respect to the color signal level according to the second embodiment of the present invention. From this result, the color signal level is about 2 dB.
It can be seen that the best evaluation is obtained when amplified.

(Third Embodiment) FIG. 4 is a system diagram showing a configuration of a third embodiment according to the system shown in Table 1 (B) of the present invention.

In the figure, the same parts as those in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 4, 18 is a color demodulation circuit. Reference numerals 19 and 20 denote inverse matrix circuits, which are R, G and B from the luminance signal Y of the television image and the color difference signals (RY) and (BY).
Inverse conversion to primary color signal. 21 is a field memory,
The written signal is read at twice the speed.

The third embodiment is the same as the above-mentioned second embodiment in that it is a time division method in which the left-eye information and the right-eye information are alternately switched every 1/120 sec. , The luminance signal Y _L from the left-eye color imaging camera and the color difference signals (RY) _L and (BY) _L are presented as they are without amplification, and the right-eye luminance from the monochrome imaging camera for the right eye is presented. An image of the signal Y _R and the color signals (RY) _L and (BY) _L from the left-eye color imaging camera is presented.

In this case, the binocular disparity information necessary for stereoscopic vision is transmitted by the luminance signals Y _L and Y _R from the left and right eye imaging cameras.

The feature of this method is that since color information is presented to both the left and right eyes, it is more natural and has less physiological burden on the eyes than the first and second embodiments described above. Even if the color signal from the color imaging camera for the left eye is used as the color signal for the right eye, if the parallax shift is small, the stereoscopic viewing is not adversely affected.

(Fourth Embodiment) FIG. 5 is a system diagram showing a configuration of a fourth embodiment according to the system shown in Table 1 (C) of the present invention.

In the figure, the same parts as those in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 5, 22 is a color demodulation circuit, 23 and 24 are inverse matrix circuits, and 25 is a field memory.

In the fourth embodiment, the color signal from the left-eye color image pickup camera is separated into a wideband component C _W and a narrowband component C _N and taken out. The left-eye information includes a luminance signal Y _L from the left camera. The image by the wideband component C _W is presented and observed by presenting the image by the luminance signal Y _R from the right camera and the narrowband component C _N from the left camera as the right-eye information.

Although the first to fourth embodiments of the present invention have been described as using the color image pickup camera for the left eye and the monochrome image pickup camera for the right eye, the color is not necessarily used for the left eye.
It is not limited to monochrome for the right eye, and it does not matter if the left and right are replaced. Further, the imaging camera is not particularly limited as long as it can extract a color video signal and a monochrome video signal.

Furthermore, the signal processing method was explained using a camera based on the current TVN standard method as the imaging camera, but it is not limited to the current TV standard method in Japan, and it is not limited to the NTSC method in the United States, the PAL method and SECAM method in Europe, or the current method. It can also be applied to the high definition television system called high definition which is being developed.

According to the system of the present invention, the twin-lens stereoscopic color television system can be realized with an extremely simple structure. Therefore, by installing a plurality of this apparatus, the present invention is applied to the multi-lens stereoscopic color television system. In this case, the structure can be extremely simplified and the price can be reduced.

[Effects of the Invention] As is clear from the above, according to the present invention, since the left eye and the right eye are not simultaneously presented with the optical stimulus, the phenomenon called inter-color binocular rivalry does not occur, and the stereoscopic color is always stable. The image can be observed.

Moreover, one of the two left and right image pickup units forming the stereoscopic television image pickup device is used for color image pickup,
It is possible to configure the other with monochrome imaging,
A stereoscopic color television system device can be simplified and its cost can be reduced.

Also, since one of the left and right image pickup units can be used for monochrome image pickup, the structure is small and lightweight, and the lens distance between the left and right image pickup units is 6.5c, which is almost the same as the human eye distance.
Since it can be arranged at m to 7 cm and distortion of the stereoscopic image caused by the arrangement of the conventional stereoscopic color television camera can be prevented, a more natural stereoscopic color television image can be displayed.

Further, in order to realize a time-division stereoscopic color television system without flicker, when reading at double speed using a field memory or the like, the capacity of the field memory for storing color signals can be saved.

Furthermore, even in a VTR (recording device) or a video disc recording device for recording a stereoscopic color television signal for the left and right two channels, one of the left and right channels should be recorded with a monochrome luminance signal. Therefore, it is possible to save the recording medium and simplify the signal processing.

[Brief description of drawings]

FIG. 1 is a system diagram showing a configuration of a first embodiment of the present invention, FIG. 2 is a system diagram showing a configuration of a second embodiment of the present invention, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a characteristic diagram of image quality evaluation according to FIG. 4, FIG. 4 is a system diagram showing a configuration of a third embodiment of the present invention, and FIG. 5 is a system diagram showing a configuration of a fourth embodiment of the present invention. 1,2 …… Input terminal, 3 …… Y / C separation circuit, 4 …… Amplifier, 5 …… Adder, 6,14,18,22 …… Color signal demodulation circuit, 7,15 …… Signal distribution circuit , 8A, 8B, 8C …… Switching circuit, 9 …… Color CRT, 10 …… LCD glasses, 11,16 …… Synchronizing signal generating circuit, 12,17 …… Switching pulse generating circuit, 13,21,25 …… Field memory, 19, 20, 23, 24 ... Inverse matrix circuit.

Claims (4)

[Claims] 1. A left-eye image and a right-eye image are sequentially displayed in a time-sharing form, and optical shutters arranged in front of the left eye and the right eye are alternately opened and closed in synchronization with the display cycle. hand,
In the stereoscopic color television device that presents the left-eye and right-eye images corresponding to the left and right eyes, respectively, a luminance signal (Y ₁ ) and a color signal (C ₁ ) obtained from one of the color television cameras. ), A first processing means for forming a _first display signal (Y ₁ + C ₁ ), and a luminance signal obtained from the other monochrome television camera.
Based on the (Y _2), and second processing means for forming a second display signal (Y _2), the image on one eye by the first display signal, the second
When presenting the image by the display signal of to the other eye,
A time-division display control means for alternately displaying one of the display signals for each field. 2. The method according to claim 1, wherein
The three-dimensional color television apparatus according to claim 1, wherein the processing means forms the first display signal based on a signal obtained by amplifying a color signal obtained from the color television camera by a predetermined amount. 3. A left-eye image and a right-eye image are sequentially displayed in a time-division form, and optical shutters arranged in front of the left eye and the right eye are alternately opened and closed in synchronization with the display cycle. hand,
In the stereoscopic color television device that presents the left-eye and right-eye images corresponding to the left and right eyes, respectively, a luminance signal (Y ₁ ) and a color signal (C ₁ ) obtained from one of the color television cameras. ), A first processing means for forming a _first display signal (Y ₁ + C ₁ ), and a luminance signal obtained from the other monochrome television camera.
(Y ₂ ) and the color signal (C ₁ ) based on the second display signal (Y
₂ + C ₁ ), and the second processing means for forming an image of the first display signal on one eye
When presenting the image by the display signal of to the other eye,
A time-division display control means for alternately displaying one of the display signals for each field. 4. A left-eye image and a right-eye image are sequentially displayed in a time-division form, and optical shutters arranged in front of the left eye and the right eye are alternately opened and closed in synchronization with the display cycle. hand,
In the stereoscopic color television device that presents the left-eye and right-eye images corresponding to the left and right eyes, respectively, a luminance signal (Y ₁ ) and a wideband color signal (C) obtained from one of the color television cameras. _W1 ), the first display signal (Y ₁
+ C _W1 ) forming the first processing means and the luminance signal obtained from the other monochrome television camera
Second processing means for forming a _second display signal (Y ₂ + C _N1 ) based on (Y ₂ ) and a narrow band color signal (C _N1 ) obtained from the color television camera; The image by the display signal of 1 is displayed on one eye by the second
When presenting the image by the display signal of to the other eye,
A time-division display control means for alternately displaying one of the display signals for each field.