JPS632491A - Video signal processing system - Google Patents

Abstract

PURPOSE:To obtain signals corresponding to human wide visual characteristics by changing the output start time of address signals to be outputted from address generating means at the time of reading/writing a video signal from/in a recording means in response to an output generated from a horizontal scanning start position setting means. CONSTITUTION:Address generators 35a, 35b varies a reading address generating position for a horizontal synchronizing signal H. Namely a horizontal scanning start position can be varied. Since data relating to a variable value generated from an address start position setting means 40 is applied to the generators 35a, 35b, the horizontal start positions of the image data stored in the generators 35a, 35b can be individually set up at the time of reading. Thus, either one of a left image L and a right image R or both of them can be varied by changing the output start time of address signals generated from the address generators 35a, 35b at the time of reading, so that signals corresponding to human visual characteristics can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an image display device suitable for use in so-called three-dimensional image devices, etc., in which images displayed on a cathode ray W (hereinafter referred to as CRT) can be viewed three-dimensionally. Regarding signal processing methods.

Background technology! Figure @4 is a block diagram showing the configuration of a conventional stereoscopic video device 1. This stereoscopic imaging device 1 has a pair of left and right imaging devices 2L and 2R. The imaging devices 2L and 2R are locked. The right video signal from the right imaging device 2, R and the left video signal from the left imaging device 2L are alternately switched by the video switch means 3 every vertical synchronization period and displayed on the CRT 4. CRT4 and human eye5
An optical shutter device 6 is arranged between the two. This optical shutter device 6 includes a right shutter 6R corresponding to the human right eye 5R1, and a left shutter 6L corresponding to the human left eye 5LI:N.
The six oscillators 7 oscillate with a period of one vertical synchronization period,
Imaging devices 2R, 2L, video switch.

The operation of the shutter means 3 and the shutters 6R and 6L are driven in synchronization with the oscillation signal of the oscillator 7. Note that the right shutter 6R and the left shutter 6L perform opening and closing operations alternately.
For example, focusing on the vertical period, the captured image is transferred to the right image pickup device 2R, the video switch means 3, and the CRT.
4, and the right image is displayed on 0RTA. At this time, the right shutter 6R is closed and the left shutter 6L is closed, so I! The right image is visible only to the viewer's right eye 5R. Similarly, in the next vertical period, CRT
Only the left image displayed on the left eye 5L is visible to the left eye 5L.

This enables stereoscopic viewing.

FIG. 5 shows the optical axes J! of the imaging devices 2R and 2L! 1. An example of an image taken when #2 is parallel is shown.

The images captured by the right imaging device 2R are the optical axis J of the right imaging device 2R for both object N and object F! 1, the object N and the object F are imaged on the left side of the screen as shown by reference f8f50R. Furthermore, since the image captured by the left imaging device 2L is located on the right side of the optical axis 12 of the left imaging device 2L, it is captured on the right side of the screen as indicated by the reference numeral 50L.

- If we think about how humans generally compare objects when we look at them, we can see that there is a difference in how the images appear when we look at object N and when we look at object F.

Foil figure 6 shows the image size when gazing at object F! ! FIG. When we humans gaze at object F,
Object F is visually recognized as one object. In other words, the optical axis No. 3 of the normal right eye 5R and the optical axis of the left eye SL! 4 is each object F
and connects the left and right eyes S R and S L. At this time, the image on the retina is formed at a location recognized as the same position in each of the left and right eyes 5R, 5L. In other words, since the images are formed at a position that is recognized as the same position, it appears as one image.

At this time, the right eye SR (the image visually recognized by this is the 8th
The left image, indicated by reference numeral 51R in FIG. 8(1) and visually recognized by the left eye 5L, is indicated by reference numeral 51L in FIG. 8(1). As is clear from the images 51R and 51L, the object F is located at the same position in both the left and right images, and the object N is located at different positions.

Further, the positional relationship when observing the object N is shown in FIG. The right image visually recognized by the right eye 5R at this time is indicated by reference numeral 52R in FIG. 8(2), and the left image visually recognized by the left eye 5L is indicated by reference numeral 52L in FIG. 8(2). When the user gazes at the object N, the object N is viewed as one object, the object N is displayed at the same position in both the left and right images, and the object F is displayed at a different position. In this way, the image taken by the imaging devices 2R and 2L of the conventional stereoscopic imaging device 1 is on the optical axis J! 1. ．． /2 is parallel, so it is always fixed, but Fig. 8 (1) and Fig. 8
As shown in Figure (2), when the human eye actually sees the object F,
The positional relationship when observing each of H is different in each case. Therefore, it is not possible to obtain an image viewed under natural visual conditions.In order to solve this problem, it is necessary to adjust the optical axes of the imaging devices 2R and 2L. It is conceivable to shift No.2. For example, the optical axis No. 1 of the imaging devices 12R and 2L
．． J? In this method, the optical axis is made variable as appropriate by aligning the optical axis with the line connecting the image capturing devices 2R, 2L and the object F, or aligning the optical axis with the line connecting the image capturing devices 2R, 2L and the object N. In such a method, it is only necessary to display the iW at the same position on the screen (therefore, it does not need to be in the center of the screen. In such a method, depending on the shooting conditions, the image may be displayed at the same location as if the user was gazing at it). Here are six examples where the range of objects that can be seen is limited: When the left and right images taken with the optical axis aligned with object N during imaging are reproduced using the optical shutter device 6, object N is at the same position. However, object F is played back in a different location.Under these shooting conditions, it is extremely easy to look at object N on the screen.However, when looking at object F on the playback screen, Such a motion inevitably becomes unnatural, and the object F may not be recognized as a single object.

Problems to be Solved by the Invention In summary, it is desirable to display images that correspond to a wide range of human visual characteristics so that images with binocular parallax can be viewed in a natural visual state regardless of the shooting conditions. It had been.

An object of the present invention is to provide a video signal processing method that solves the above-mentioned technical problems and makes it possible to obtain images that correspond to a wide range of human visual characteristics.

Means for Solving Problem α The present invention provides means for recording image data corresponding to one horizontal scan of a video signal in pixel units, address generation means for generating an address for the recording means, and horizontal scanning of image data. means for setting a scanning start position, and changing the output start time of the address signal of the address generating means when reading/writing the video signal to the recording means in response to the output from the horizontal scanning start property Wi setting means. This is a video signal processing method characterized by the following.

According to the present invention, in response to the output from the horizontal scanning start position setting means, when reading/writing image data corresponding to one horizontal scanning line of a video signal to the recording means, the address from the address generation means is set. The start time of signal output changes. As a result, the horizontal scanning position of the seven image data can be made variable, and therefore images that correspond to a wide range of human visual characteristics can be displayed.

Embodiment FIG. 1 is a block diagram showing the electrical configuration of an embodiment of the present invention. The stereoscopic imaging device fi29 is provided with a pair of left and right imaging devices 3OR and 30L. This right imaging device 30
R and the left imaging device 3OL are in a locked state, so the horizontal synchronizing signal 1-1 and the vertical synchronizing signal V are in phase. The right video signal R having stone-cutting image data of the subject 31 from the right imaging device 30R is sent to the multiplexer 3
given to 2. - On the other hand, the left video signal having left image data regarding the subject 31 of the left imaging device fi3 OL is applied to the multiplexer 32 and also to the synchronization separation circuit 33. In the synchronization portion forward cycle vI33, the vertical synchronization signal (■) and the horizontal synchronization signal H are separated.

The separated vertical synchronizing signal (2) is applied to an inverter circuit G20. The output of this inverter circuit G20 is a D-type 7-lip flop (hereinafter referred to as 7-lip 70-tub) F.
It is applied to the clock input terminal CK of FI. 7 lip 7
In 0FFX, the frequency of the vertical synchronizing signal (■) is divided by 172 and output.

The output from the output terminal Q of the flip 70-tube FFI is 1
It is applied to the multiplexer 32 as a multiplexer switching signal B shown in FIG. 3(2), and an optical shift signal is applied as a shutter drive signal C shown in FIG. 3(3). address generator 35b.

The output from the inverted output terminal Q of the 7-rip, 70-tube FFI is given to the input terminal as well as to the address generator 53.
5 given to a.

The horizontal synchronization signal H from the synchronization separation circuit 33 is individually applied to the tally input terminal CK of the D-type 7-lip 70-tube (hereinafter referred to as 7-lip 70-tube) FF2 and the multiplexer 37. The 7 ribs and 70 ribs FF2 divides the frequency of the horizontal synchronizing signal H into 1/2 and outputs the result. The output from the output terminal Q of the 7-rip, 70-tube FF2 is the address generator 3.
5b. - On the other hand, in the multiplexer 32, one vertical synchronization period W is generated by the signal line shown in FIG.
As a result, a video signal in which right image data and left image data are alternately arranged is obtained from the multiplexer 32 every one vertical ipsilateral period W1, and this video signal is an analog /Digital converter 3
8, is converted into digital data, and is provided to line memories 39a and 39b. line memory 39
Image data a and 39b correspond to one horizontal scanning line of the video signal S, and 0 image data, which is read/written and scanned alternately in units of 'ei elements, is stored in the line memory 39a.

39b and then read out. Further, the line memory 39a and the line memory 39b operate in a complementary manner; for example, when the line memory 39a is writing, the line memory 39b is outputting image data. In other words, it is an exchange buffer 7 system. This line memory 39a has an address generator 35.
When the address signal from a is given to h, the line memory 39a
Writing/reading is performed. Similarly, a 7 address signal is applied from the address generator 35b to the line memory 39b, thereby writing/reading the line memory 39b.

The address generators 35a and 35b receive a horizontal synchronization signal H1m
N, the generation position of the read address can be made variable, that is, the horizontal scanning start position can be made variable. Note that the address generators 435a and 35b are given data regarding the variable amount from the address start position setting means 40, so that the address generator 35
The horizontal start position 1 of the image data stored in a and 35b can be individually set at the time of reading. In this way, by changing the output start time of the address signals of the address generators 35a and 35b during readout, it is possible to change whether the left image or the right image is displayed, or whether the right image or the left image is displayed individually. This makes it possible to obtain images that correspond to human visual characteristics.

The multiplexer 37 switches the outputs of the line memory 39a and line memory 39b in synchronization with the horizontal synchronizing signal H, supplies it to the differential/analog converter 41, converts it to analog data, and outputs it to the CRT 42. This allows C
Image data is displayed on RT42. The optical shutter device 36 is interposed between the human eye 43 and the CRT 42 .

The shutter device 36 includes a right shutter 36R corresponding to the human right eye 43R and a left shutter 36L corresponding to the left eye 43L.
including. What is the right shutter 3GR and left shutter 36L?
The drive signal C causes the right shutter 36R and the left shutter 36L to alternately open and close every vertical period W.

When the right image is displayed on the CRT 42, the right shutter 3
6R is open, and the left shutter 36L is closed.

Therefore, the right image is right eye 43. Visible only to R. −
On the other hand, when the left image is displayed on the CRT 42, the right shutter 36R is closed and the left shutter 36L is open. Therefore, the left image is visible only to the left eye 43L. Therefore, the subject 31 can be viewed three-dimensionally. However, since the display position can be arbitrarily moved in the horizontal scanning direction by the address start position setter Fi40, it is possible to view a stereoscopic image with a sense of realism regardless of the imaging conditions.

FIG. 2 is a block diagram showing a specific configuration of address generators 35a and 35b. The horizontal synchronization signal H is applied to the bonotice edge detection circuit 60 and the negative edge detection circuit 61.
and are individually input to the D-type 7s 7s 70 tube FF2. The output of the 7-rip 70-tube FF2 is the horizontal synchronization signal H.
The high level and low level are inverted every time, and the high level and low level are alternately taken every horizontal period. The output of this 7-lip 70-flop FF2 becomes the image data read/write signal Y shown in FIG. Write addresses and read addresses are generated alternately. Negative edge detection circuit 6
1, a negative edge of the horizontal synchronizing signal H shown in FIG. 3(4) is detected and a reset signal F shown in FIG. 3(5) is output.

The reset signal F from the negative edge detection circuit 61 is applied to the terminal Re5eL of the counters 63 and 64. Further, the reset signal F is a NAND data)G8.
It is applied to the latch circuit 65 composed of G9, is latched for a certain period of time by the launch circuit 65, and is used as the display clock prohibition signal shown in PIS3 diagram (6) as a NAND data (GIO).
This is one of the inputs.

AND day) When the output of G9 becomes low level,
The output of AND day) GIO is always at a low level, and as a result, input of the display clock to the counter 64 is prohibited. Furthermore, the reset signal F is transmitted to the display clock generation circuit 8.
The 1 display clock generation circuit 80 which is input to one side of the NAND data (0) Gl includes a NANDJf-to G1, an inverter circuit G2°G3, and resistors R1, R, 2, R3:
l:/7''7 The display clock generation circuit 8 is configured by inputting the reset signal F.
The generation phase of 0 is initialized.

The counter 63 starts counting upon the rise of the reset signal F. The output of the counter 63 is one input of the minus number circuits 67 and 68, and is compared with the data from the address start position setting means 40 of the latch circuits [39 and 70, respectively, and when the comparison values match, the AND Day) G4. Outputs a high level signal to GS.

AND day) G4. G5, inverter circuit G6, and O
R day) G7 constitutes a multiplexer 71.

This multiplexer 71 is switched by the output from the 7-lip 70-tube FF1. As a result, when the left video signal R is selected, the output of the 1Ia68 is applied to the OR gate) G7 several times, and when the right video signal R is selected, the output of the circuit 67 is applied to the OR gate) G7. Given. Further, the output of the OR gate) G7 becomes one input of the multiplexer 72. The multiplexer 72 is
ND date Gll, 12, inverter circuit G14,
OR day) Gl 3. The positive edge signal of the horizontal synchronizing signal H from the positive edge detection circuit 60 is input to the input terminal of the AND date G11, which is the other input of the multiplexer 72, and the positive edge signal of the horizontal synchronizing signal H from the positive edge detection circuit 60 is input, and the image output from the 7 lip 70 tab FF2 is input. It is selected by the write/read signal Y and becomes the input of NAND data) G9.

When the input of G9 (NAND date) becomes high level, the output of the latch circuit 80 is inverted, and the input of AND date GI
The inhibition of clock input to the counter 64, which had been blocked by O, is lifted, and the counter 64 starts counting up.

In this way, the latch circuit 65 is reset at the falling edge of the horizontal synchronizing signal H, and the timing of address generation is changed by selecting the latch inversion timing depending on each case.

The operation will be explained with reference to FIG. Figure 3 (1) shows the vertical synchronization signal ■, and Figure 3 (2) shows the multiplexer 3.
3(3) shows the shutter drive device c, FIG. 3(4) shows the horizontal synchronizing signal H, FIG. 3(5) shows the reset signal F, and FIG. 3 (6) shows the clock prohibition signal K, and FIG. 3 (7) shows the image data read/f inclusion signal Y. In the left video signal output period Wa, the horizontal synchronizing signal H falls at time L1. Upon detection, the reset signal S shown in FIG. 5 (5) is output. This initializes the address generators 35a and 35b. That is, the capunters 63 and 64 are reset. Further, the clock prohibition signal K falls at time t1 and rises at time 2 after the clock prohibition period We.

This period We is larger than the width of the horizontal synchronizing signal H, and during this period We, the address signal is output from the address generator 35a.
, 35b.

Seven address signals are output from time t2 after the clock prohibition interval We has elapsed, and therefore, for example, left image data of the address generator 35a is read from time t2 to time L3. Therefore, in the 0th-order image data writing period in which the image related to the first horizontal scanning line of the left image is displayed on the CRT 42 while moving in the horizontal scanning direction, the clock inhibition period We is the same as the width of the horizontal synchronizing signal, so the address Generator 3
5a, left image data is stored without shifting in the horizontal scanning direction. Note that reading/writing is also performed on the address generator 35b in the same manner as the address generator 35a. This kind of operation is one field period W of the left video signal.
It is carried out during a.

Next, during the output period wb of the right video signal, the tarlock prohibition period We is set to have the same width as the horizontal synchronizing signal H regardless of whether the image data is read/incorporated. Therefore, the right i-image is transferred to the CRT without shifting in the horizontal scanning direction.
42.

In this way, the clock inhibition period Wc has the same width as the horizontal synchronizing signal when writing data, and when reading data, it can be set separately for displaying the left video signal and when displaying the right video signal. This allows you to view natural images in 3D.

In the embodiment described above, the output of the address signal is delayed by one when reading IS image data, but it may be delayed when writing.

Further, in the above embodiment, only the left image was moved in the horizontal scanning direction and displayed, but only the right image or the left and right images may be moved.

Effects As described above, according to the present invention, since the horizontal scanning starting position can be made variable, the visual characteristics that were conventionally determined by conditions can be changed arbitrarily, and a wide range of visual characteristics can be adjusted. This makes it possible to display images with a more natural and realistic feel.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the electrical configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing the specific configuration of address generators 35a and 35b, and fIS3 is a signal waveform for explaining the operation. 4 is a block diagram showing the configuration of a conventional stereoscopic image device 1, and FIG. 5 is a block diagram showing the configuration of a conventional stereoscopic image device 1.
optical axis 71. The position of the image taken when No.2 is parallel
l! Figure 6, which shows the I part, shows the position r! of the image when looking at the object F. FIG. 7 is a diagram showing the positional relationship when observing the object N, and FIG. 8 is a diagram showing the image state in the case of FIGS. 6 and 7. 29... Stereoscopic video device, 31... Subject, 30R1
3OL...Imaging device, 32.37...Multiplexer, 33...Synchronization separation circuit, 35m, 35b...Address generator, 39a, 39b...Line memory, 40
...Address start position setting means Agent Patent attorney Number of strokes Kei-bu bL 58 Figure 6

Claims (1)

[Scope of Claims] Means for recording image data corresponding to one horizontal scanning line of a video signal pixel by pixel; Address generation means for generating an address for the recording means; Means for setting a horizontal scanning start position of image data. characterized in that the output start time of the address signal of the address generating means is changed when reading/writing the video signal to the recording means in response to the output from the horizontal scanning start position setting means. Video signal processing method.