JPH08331598A - Stereoscopic video display device - Google Patents

Abstract

PURPOSE: To provide the stereoscopic video image display device in which a 3-dimension video image generated by phase shift in the horizontal direction is displayed so as to increase a stereoscopic sense of a viewer. CONSTITUTION: The display device is provided with a 2D/3D conversion circuit 2 generating a left eye video signal L and a right eye video signal R forming a 3-dimension video image from an original 2-dimension video signal, 1st and 2nd phase shift adjustment circuits 3a, 3b adjusting phase shift in the horizontal direction for the left eye video signal L and the right eye video signal R by the 2D/ 3D conversion circuit 2, 1st and 2nd mixer circuits 5a, 5b mixing a character signal to the left eye video signal L and the right eye video signal R outputted from the 1st and 2nd phase shift adjustment circuits 3a, 3b, and a monitor section 6 synthesizing a mark 11 comprising the character signal with the 3-dimension video image based on the output from the 1st and 2nd mixer circuits 5a, 5b and displaying the mixed signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display for displaying on a monitor a pseudo three-dimensional image generated by signal processing a two-dimensional image and a true three-dimensional image taken by two cameras or the like. Regarding the device.

[0002]

2. Description of the Related Art Most of the video software used in a three-dimensional video display system, which has been recently talked about, is specially created for displaying a three-dimensional video. Such 3
Video software for displaying a three-dimensional video is generally one in which two cameras are used to capture and record a left-eye video and a right-eye video. The left and right images recorded in this 3D image software are displayed on one display.
The observer is made to recognize a three-dimensional image by making the left-eye image and the right-eye image, which are displayed in double, enter the left and right eyes of the observer, respectively.

However, there are many kinds of image software created by two-dimensional images in the world, and almost no image software for three-dimensional images exists. Therefore, in order to display a three-dimensional image, a new three-dimensional image is required. There is a problem that it is necessary to produce video software, which is time-consuming and costly.

Therefore, a method of converting a two-dimensional image into a three-dimensional image, for example, a method of converting a recorded two-dimensional image by field delay has been proposed. For example, in the case of a two-dimensional image showing an object moving from left to right, this original two-dimensional image is used as a left-eye image, and an image several fields before the left-eye image ( (This image can be obtained by field delay) is set as the right-eye image, and since a parallax occurs between the left-eye image and the right-eye image, both images are displayed on the screen. By doing so, the moving object is projected forward with respect to the background.

However, the above-mentioned method is effective for a video having a predetermined amount of movement in the horizontal direction, but it is a still video, or there is a motion in the vertical direction but no motion in the horizontal direction. Or 3 for small motion video
There is a problem that a 3D image cannot be generated.

As a method for solving such a problem, for example, in Japanese Patent Application No. Hei 6-162259, an input two-dimensional image and an image obtained by horizontally shifting the phase of the two-dimensional image are used. A method of generating a three-dimensional image has been proposed. Specifically, as shown in FIG. 6, the entire screen is shifted to the left for the left-eye image and to the right for the right-eye image, so that the target object is seen deeper than the monitor surface (display surface). By moving the left-eye image to the right and the right-eye image to the left, the object can be seen in front of the monitor surface.

Further, even for a video image having a predetermined amount of movement in the horizontal direction, the above-mentioned phase shift is performed after the three-dimensional video image is generated by the above-mentioned field delay, so that the entire three-dimensional video image is displayed. It can be moved to the front side or the back side with respect to the monitor surface. That is, by changing the amount of phase shift in the horizontal direction, the reference plane of the 3D image is moved to the front side or the back side with respect to the monitor surface, and the protrusion amount and the depth amount of the entire 3D image are adjusted. You can do it.

However, when the observer observes the three-dimensional image generated by the above-described horizontal phase shift, it is difficult for the observer to know where the reference plane of the three-dimensional image is with respect to the monitor surface. However, there is a problem that it is hard to feel a three-dimensional effect. There is also a problem that it is difficult to adjust the pop-out amount and the depth amount.

Further, even when a true three-dimensional image photographed by using two cameras and a character image composed of a character signal are simultaneously displayed on the monitor surface,
It may be necessary to adjust the position in the front-rear direction (protrusion amount, depth amount) with respect to the composite image of the three-dimensional video.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the drawbacks of the above-mentioned conventional example, and increases the stereoscopic effect of an observer in a three-dimensional image generated by shifting the phase in the horizontal direction. It is an object to provide a stereoscopic image display device for displaying.

Further, according to the present invention, a three-dimensional image generated by converting a two-dimensional image or a three-dimensional image photographed by two cameras and a character image can be displayed. It is an object of the present invention to provide a stereoscopic video display device capable of adjusting the front-rear positional relationship between a video and a character image.

[0012]

A first stereoscopic image display device of the present invention generates a left-eye image signal and a right-eye image signal that form a three-dimensional image from an original two-dimensional image signal. A signal conversion circuit, a phase adjustment circuit that adjusts the horizontal phase shift amount between the left-eye video signal and the right-eye video signal generated by the signal conversion circuit, and the left-eye output from the phase adjustment circuit Circuit for mixing the character signal into each of the video signal for the right eye and the video signal for the right eye, and a monitor unit for displaying a composite image of the three-dimensional image and the character image based on the output from the mixing circuit. It consists of and.

According to this first stereoscopic image display device, 2
It is possible to synthesize and display the three-dimensional image generated from the three-dimensional image and having the phase adjusted, and the character image based on the character signal.

Therefore, by comparing the phase-adjusted three-dimensional image generated from the two-dimensional image with the character image, the position of the reference plane of the three-dimensional image displayed on the monitor portion can be easily understood, and the observer can easily see the position. Makes it easier to feel a three-dimensional effect. In addition, by adjusting the amount of phase shift in the horizontal direction, the front-rear positional relationship between the three-dimensional image displayed on the monitor unit and the character image can be adjusted to have a suitable positional relationship.

Further, as the signal conversion circuit, for example, the original two-dimensional video signal is used as a video signal for one eye and the original two-dimensional video signal is delayed by a predetermined field for the other video signal. Some are generated as video signals for the eye.

Further, the character signals mixed into the left-eye video signal and the right-eye video signal by the mixing circuit may be the same signal with no parallax between them.
It may be a signal having a parallax between them.

When the character signals mixed in the left and right images are the same signal without parallax, the character image is displayed on the same screen as the monitor surface, and the three-dimensional image of the three-dimensional image by phase adjustment is displayed. It becomes easy to adjust the depth amount and the protrusion amount.

The image displayed on the monitor is 3
A control circuit may be provided for determining whether the image is a two-dimensional image or a two-dimensional image and changing the presence or absence or the type of the character signal based on the determination result.

In this way, the character image can also be used as a mode display of the display video. Also,
A second stereoscopic image display device of the present invention includes a phase adjustment circuit that adjusts a horizontal phase shift amount between a left-eye image signal and a right-eye image signal that have a parallax between them, and A mixing circuit that mixes a character signal with each of the output left-eye video signal and right-eye video signal, and synthesizes a three-dimensional video and a character image composed of the character signal based on the output from the mixing circuit. It is characterized in that it comprises a monitor unit for displaying the information.

According to the second three-dimensional image display device, the three-dimensional image input to the three-dimensional image display device and having its phase adjusted and the character image based on the character signal can be combined and displayed.

Therefore, by comparing the phase-adjusted three-dimensional image generated from the two-dimensional image with the character image, the position of the reference plane of the three-dimensional image displayed on the monitor portion can be easily understood, and the observer can easily see the position. Makes it easier to feel a three-dimensional effect. In addition, by adjusting the amount of phase shift in the horizontal direction, the front-rear positional relationship between the three-dimensional image displayed on the monitor unit and the character image can be adjusted to have a suitable positional relationship.

Further, the character signals mixed into the left-eye video signal and the right-eye video signal by the mixing circuit may be the same signal with no parallax between them.
The signal may have a parallax between them.

When the character signals mixed in the left and right images are the same signal without parallax, the character image is displayed on the same screen as the monitor surface, and the three-dimensional image of the three-dimensional image by phase adjustment is displayed. It becomes easy to adjust the depth amount and the protrusion amount.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a diagram showing the configuration of a stereoscopic image display device according to a first example which is an embodiment of the present invention.

In the figure, 1 is an input terminal for inputting a 2D image signal for displaying a normal 2D image, and 2 is a 2D image signal input from the input terminal 1 into a 3D image signal by field delay. A 2D / 3D conversion circuit for converting and outputting a left-eye video signal L and a right-eye video signal R, 3a is a horizontal phase adjustment of the left-eye video signal output from the 2D / 3D conversion circuit 2. First phase adjusting circuit for performing 3
Reference numeral b is a second phase adjustment circuit for adjusting the horizontal phase of the right-eye video signal output from the 2D / 3D conversion circuit 2.

The first and second phase adjusting circuits 3a and 3b.
Each of them is composed of a line memory, and by delaying the input signal for an arbitrary time within one horizontal scanning period, the horizontal read position of the output image can be adjusted left and right independently by ± 48 pixels. , The parallax amount is changed by arbitrarily changing the phase shift amount, and the sense of depth is adjusted.

Reference numeral 4 is a character signal generation circuit for outputting a character signal for displaying a character image on the monitor surface, and 5a is the left-eye video signal output from the first phase adjusting circuit 3a. A first mixing circuit 5b for mixing (superimposing or inserting) a second mixing circuit 5b for mixing (superimposing or inserting) the character signal with the video signal for the right eye outputted from the second phase adjusting circuit 3b, Reference numeral 6 denotes a monitor unit that displays a three-dimensional image or a two-dimensional image based on the left-eye and right-eye image signals output from the first and second mixing circuits 5a and 5b.
The monitor unit 6 alternately switches the input left-eye video signal and right-eye video signal for each field, and outputs the left-eye video signal and the right-eye video signal. It is provided with a signal synthesizing circuit for alternately switching and outputting for each pixel.

Reference numeral 7 is a control circuit for controlling the field delay amount of the 2D / 3D conversion circuit 2 based on the image of each field of the input two-dimensional image signal.
Is a control circuit for controlling the phase shift amount of the first and second phase adjusting circuits 3a and 3b, the operation of the character signal generating circuit 4, etc., and 8 is the 2D / 3 via the control circuit 7.
D conversion circuit 2, the first and second phase adjustment circuits 3a, 3
b, ON / OFF of the operation of the character signal generation circuit 4
It is an operation unit for switching OFF and adjusting the phase shift amounts of the first and second phase adjusting circuits 3a and 3b.

Next, the operation of the stereoscopic image display device of the first embodiment will be described. The 2D video signal input to the input terminal 1 is supplied to the left eye video signal L by the 2D / 3D conversion circuit 2.
And the video signal R for the right eye is generated and output. The left-eye video signal L and the right-eye video signal R are obtained by delaying one of the video signals with respect to the input video signal by several fields and outputting the other video signal without delay.
It should be noted that which of the left and right video signals is delayed is determined by the direction of the horizontal movement of the object in the input video, and the delay amount is determined by the magnitude of the horizontal movement, and this determination operation is performed by the control circuit 7. .

The left-eye and right-eye video signals L and R generated by the 2D / 3D conversion circuit 2 are shifted by a predetermined amount in the horizontal direction by the first and second phase adjustment circuits 3a and 3b, respectively. Is performed, and the reference plane of the 3D image is adjusted so as to be located on the back side of the monitor plane. Therefore, even for an image in which the movement of the object in the horizontal direction is small, the observer feels a stereoscopic effect because the reference plane is always located behind the monitor plane.

When the control circuit 7 determines that the 2D / 3D conversion circuit 2 is operating, the character signal generation circuit 4 displays a mark indicating that a three-dimensional image is displayed as a character image. A character signal for outputting. The character signals are the first and second
The left-eye video signal and the right-eye video signal whose phases have been shifted in the mixing circuits 5a and 5b are mixed and input to the monitor unit 6. At this time, the character signals output from the character signal generation circuit 4 to the first and second mixing circuits 5a and 5b are the same signal with no parallax therebetween.

FIG. 2 is a plan view schematically showing the depth amount of the reference plane of the three-dimensional image displayed on the monitor unit 6 with respect to the monitor face, and FIG. 3 is a perspective view schematically showing the depth amount. As shown in FIGS. 2 and 3, the reference plane 9 of the stereoscopic image to be displayed is located behind the monitor plane 10 due to the horizontal phase shift of the first and second phase adjustment circuits 3a and 3b.
Further, since the character signals forming the mark 11 are mixed in the subsequent stages of the first and second phase adjusting circuits 3a and 3b, the horizontal phase shift is not performed, and the mark 1
1 is on-screen displayed (composite display) on the same surface as the monitor surface 10. Therefore, the observer can recognize the position of the monitor surface 10 by the mark 11.

In the stereoscopic image display apparatus of the first embodiment, the movement in the horizontal direction is small, and the image is displayed so as to be positioned on the reference plane 9 located on the inner side of the monitor plane 10 by shifting the horizontal phase. With respect to the object 12, the observer can easily recognize that the object 12 is located behind the mark 11, that is, behind the monitor surface 10 by comparing with the mark 11. You can do it, and you can feel the three-dimensional effect.

In the first embodiment, the first and second phase adjusting circuits 3a and 3b are adjusted so that the reference surface 9 is located deeper than the monitor surface 10, but the reference surface is opposite. Face 9
The first and second phase adjusting circuits 3a and 3b may be adjusted so that the position is on the front side of the monitor surface 10.

The first and second phase adjusting circuits 3 are also provided.
The phase shift amounts of a and 3b may be fixed or manually adjusted, or may be automatically adjusted according to the magnitude of the horizontal movement of the object in the input image.

When the mark 11 is a character, a symbol or a graphic that expresses a three-dimensional display, the image displayed on the monitor unit 6 is 2 times based on the image signal input to the monitor unit 6. It is also possible to automatically detect whether it is a three-dimensional image or a three-dimensional image, and to output the character signal from the character signal generation circuit 4 only when the three-dimensional image. By doing so, when the three-dimensional image is displayed on the monitor unit 6, the mark 11 is displayed on the monitor unit 6, and when the two-dimensional image is displayed on the monitor unit 6, the mark 11 is displayed. It is no longer displayed on the monitor unit 6.

Further, based on the video signal input to the monitor unit 6, it is automatically determined whether the image displayed on the monitor unit 6 is a two-dimensional image or a three-dimensional image, and the determination result is obtained. The type of character signal may be changed accordingly. Only when the image displayed on the monitor is a two-dimensional image or a three-dimensional image and the image is a three-dimensional image, the character signal generation circuit 4 outputs a character signal and the mark 11 is displayed on the monitor unit 6. It may be configured to display on-screen. As shown in FIG. 4, when the phase adjusting circuits 3a and 3b are adjusted so that the reference plane 9 of the three-dimensional image is located on the rear side of the monitor plane 10, the mark 11 is displayed on the monitor plane 10. You may make it supply the character signal with a parallax mutually to the 1st mixing circuit 5a and the 2nd mixing circuit 5b so that it may be displayed on the surface 13 on the front side.

In the above case, the mark 11 is attached to the monitor surface 1.
It was displayed on the surface 13 on the front side of 0, but the mark 11
May be displayed behind the monitor surface. However, in this case, the mark 11 needs to be displayed in front of the most prominent image of the three-dimensional image or at a prominent position approximately the same as the most prominent image. Also,
When the phase adjusting circuits 3a and 3b are adjusted so that the reference plane 9 of the three-dimensional image is located on the front side of the monitor plane 10, the mark 11 is located ahead of the most protruding image of the three-dimensional image. Alternatively, character signals having parallax with each other may be supplied to the first mixing circuit 5a and the second mixing circuit 5b so that the first mixing circuit 5a and the second mixing circuit 5b are displayed at the same pop-out position as the most pop-out image.

Next, a second example which is an embodiment of the present invention will be described. FIG. 5 is a block diagram showing the configuration of the stereoscopic image display device according to the second embodiment. The same parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, 1L is a left-eye input terminal to which a left-eye video signal is input, and 1R is a right-eye input terminal to which a right-eye video signal is input. The video signal for the eye is, for example, a signal for displaying a true three-dimensional video image captured by two cameras or the like. That is, of the two cameras, one camera captures the left-eye image and the other camera captures the right-eye image.

The left-eye video signal thus obtained is input to the left-eye input terminal 1L, and the right-eye video signal is input to the right-eye input terminal 1R. The left and right video signals input from the left-eye and right-eye input terminals 1L and 1R are respectively phase-shifted in the horizontal direction by a predetermined amount by the first and second phase adjusting circuits 3a and 3b, and three-dimensionally. The reference plane of the image is adjusted so as to be located behind the monitor plane. And
The phase-shifted left and right video signals are mixed with the character signals from the character signal generation circuit 4 by the first and second mixing circuits 5a and 5b and input to the monitor unit 6. Therefore, on the monitor surface of the monitor unit 6, a character image composed of a character signal is displayed on the screen in a true three-dimensional image.

In the first and second stereoscopic image display devices as described above, the true three-dimensional image and the character signal are adjusted by adjusting the phase shift amounts of the first and second phase adjusting circuits 3a and 3b. It becomes possible to adjust the depth relationship with the character image constituted by.

That is, for example, when a character image of a window is displayed by a character signal and a three-dimensional image such as a landscape is displayed inside the window, the observer uses the operation unit 8 to display the first,
By changing the amount of phase shift of the second phase adjusting circuits 3a and 3b, the front-rear relationship between the character image and the three-dimensional image can be adjusted so that the three-dimensional image exists behind the window.

[0044]

According to the present invention, the stereoscopic effect of the stereoscopic image of the three-dimensional image formed by converting the two-dimensional image can be greatly sensed by the observer by comparing it with the character image displayed on the monitor surface. A video display device can be provided.

In particular, according to the present invention, when a three-dimensional image is generated by the delay method, it is possible to display a three-dimensional image having a stereoscopic effect even on a two-dimensional image having a small amount of horizontal movement. Become.

Further, according to the present invention, since the character image is displayed on the same plane as the monitor surface, the depth amount or the pop-out amount of the three-dimensional image displayed on the monitor surface is referred to the position of the character image as a reference. Can be easily adjusted.

Further, according to the present invention, the character image can be used also as a mode display, and it is easy for the observer to determine whether the image displayed on the monitor is a two-dimensional image or a three-dimensional image. Can be made to recognize.

Further, according to the present invention, by adjusting the horizontal phase shift amount of the left and right video signals, the front-back position of the three-dimensional video with respect to the character image displayed on the monitor surface is adjusted to the optimum position. It is possible to provide a stereoscopic image display device capable of doing so.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a stereoscopic image display device according to a first embodiment of the present invention.

FIG. 2 is a plan view schematically showing a position of a reference plane of a 3D image with respect to a monitor plane.

FIG. 3 is a perspective view schematically showing a position of a reference plane of a 3D image with respect to a monitor plane.

FIG. 4 is a perspective view schematically showing a position of a reference plane of a three-dimensional image with respect to a monitor plane.

FIG. 5 is a block diagram showing a configuration of a stereoscopic image display device according to a second embodiment of the present invention.

FIG. 6 is a diagram showing the principle of stereoscopic vision by phase shifting.

[Description of sign]

 2 2D / 3D conversion circuit 3a 1st phase adjustment circuit 3b 2nd phase adjustment circuit 4 Character signal generation circuit 5a 1st mixing circuit 5b 2nd mixing circuit 6 Monitor 7 Control circuit 9 Reference surface 10 Monitor surface 11 Mark (Character image)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiro Maenaka 2-5-5 Keihan Hondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (8)

[Claims] 1. A signal conversion circuit for generating a left-eye video signal and a right-eye video signal that form a three-dimensional video from an original two-dimensional video signal, and a left-eye video signal generated by the signal conversion circuit. A phase adjustment circuit that adjusts the horizontal phase shift amount between the video signal and the right-eye video signal, and the character signal is mixed with each of the left-eye video signal and the right-eye video signal output from the phase adjustment circuit. A stereoscopic image display device, comprising: a mixing circuit for performing a three-dimensional image and a monitor unit for displaying a three-dimensional image and a character image formed of the character signal based on an output from the mixing circuit. 2. The signal conversion circuit uses an original two-dimensional video signal as a video signal for one eye, and a video signal obtained by delaying the original two-dimensional video signal by a predetermined field for the other eye. The stereoscopic image display device according to claim 1, wherein the stereoscopic image display device is generated as a signal. 3. The character signal mixed into the left-eye video signal and the right-eye video signal by the mixing circuit is the same signal with no parallax therebetween. The stereoscopic image display device according to 2. 4. The character signal mixed into the left-eye video signal and the right-eye video signal by the mixing circuit is a signal having a parallax between them.
Alternatively, the stereoscopic image display device described in 2. 5. A control circuit is provided for determining whether the image displayed on the monitor is a three-dimensional image or a two-dimensional image, and changing the presence or absence or the type of the character signal based on the determination result. Claims 1 and 2 characterized in that
Alternatively, the stereoscopic image display device described in 3. 6. A phase adjusting circuit for adjusting a horizontal phase shift amount between a left-eye image signal and a right-eye image signal having a parallax between them, and a left-eye image output from the phase adjusting circuit. From a mixing circuit that mixes a character signal into each of the signal and the video signal for the right eye, and a monitor unit that combines and displays a three-dimensional video image and a character image based on the output from the mixing circuit. A stereoscopic image display device characterized by the following. 7. The character signal mixed into the left-eye video signal and the right-eye video signal by the mixing circuit is the same signal with no parallax therebetween. Stereoscopic image display device. 8. The character signal mixed into the left-eye video signal and the right-eye video signal by the mixing circuit is a signal having a parallax between them.
The stereoscopic image display device described.