JP2006195018A - Three dimensional display method, image generation side apparatus and image display side apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To transmit an image necessary for a three dimensional display method of a DFD (Depth-Fused 3-D) system by utilizing a transmission path which is used for transmitting an image by a conventional two dimensional display system. <P>SOLUTION: In the three dimensional display method, a three dimensional solid image is displayed by displaying a two dimensional image on each of a plurality of display faces positioned at different depth viewing from a viewer in an image display side and by changing luminance or transmittance of the two dimensional image displayed for each display face, independently for every display face. The two dimensional image and a depth image are transmitted from an image generation side and in the image display side, the two dimensional image for each display face in which the luminance or the transmittance are independently changed for every display face, is generated from the two dimensional image and the depth image, and the three dimensional solid image is displayed by displaying the two dimensional image for each display image. The two dimensional image and the depth image are transmitted from the image generation side to the image display side by an independent signal system arranged in parallel. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a three-dimensional display method, an image generation side device, and an image display side device, and more particularly to a technique effective in transmitting a three-dimensional image.

The present inventors have been able to suppress the contradiction between physiological factors of stereoscopic vision, and can easily perform three-dimensional display without using stereoscopic glasses, and the three-dimensional DFD (Depth-Fused3-D) method. A display device has been proposed (see Patent Document 1 and Patent Document 2 below).
The proposed three-dimensional display device described above displays a two-dimensional image on a plurality of display surfaces, and changes the brightness or transparency of the two-dimensional image displayed on the plurality of display surfaces for each display surface. A three-dimensional stereoscopic image is displayed.

As prior art documents related to the invention of the present application, there are the following.
Japanese Patent No. 3022558 Japanese Patent No. 3460671

However, when an image is transmitted from the image generation side device to the image display side device, and the 3D stereoscopic image is displayed by the DFD method in the image display side device, the image generation side device transmits the image to the image display side device. As an image transmission line, a conventional transmission line used for transmitting an image in the two-dimensional display method cannot be used as it is, and a dedicated transmission line is prepared and necessary for the three-dimensional display method of the DFD method. There was a problem that it was necessary to send an image.
The present invention has been made to solve the problems of the prior art, and an object of the present invention is to provide a conventional two-dimensional display method in a three-dimensional display method, an image generation side apparatus, and an image display side apparatus. It is an object of the present invention to provide a technique capable of transmitting an image necessary for a three-dimensional display method of the DFD method using a transmission path used for transmitting an image.
The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows.
In order to solve the above-described problems, the present invention displays two-dimensional images on a plurality of display surfaces at different depth positions as viewed from the observer on the image display side, and displays the two-dimensional images on the respective display surfaces. A three-dimensional display method for displaying a three-dimensional stereoscopic image by independently changing the luminance or transparency of a two-dimensional image for each display surface, wherein the two-dimensional image and the depth image are displayed from the image generation side. Each display that is transmitted to the display side, and on the image display side, the brightness or the transmittance is changed independently for each display surface from the two-dimensional image and the depth image transmitted from the image generation side. A two-dimensional image for a surface is generated, the two-dimensional image for each display surface is displayed on each display surface, and a three-dimensional stereoscopic image is displayed.
In the present invention, the two-dimensional image and the depth image are transmitted from the image generation side to the image display side in parallel independent signal systems.
In the present invention, the two-dimensional image and the depth image are alternately time-divided and transmitted by the same signal system from the image generation side to the image display side.
In the present invention, the time division unit is any one of a frame unit, a field unit, a line unit, a pixel unit, a block unit, or a combination of a plurality of units.
In the present invention, the two-dimensional image and the depth image are divided into a single image and transmitted by the same signal system from the image generation side to the image display side.
Further, in the present invention, the space division is performed by dividing the left and right or top and bottom in one image.
In the present invention, the space division is performed by alternately dividing a single image in the horizontal direction or the vertical direction in units of lines, pixels, or blocks.

In addition, the present invention provides a two-dimensional image on a plurality of display surfaces at different depth positions as viewed from an observer, based on the image generation side device, and the two-dimensional image and depth image transmitted from the image generation device side. An image display-side device that displays a three-dimensional stereoscopic image by independently changing the luminance or transparency of the two-dimensional image displayed on each display surface for each display surface, The image generation side device includes image generation means for generating a two-dimensional image and a depth image and transmitting the two-dimensional image and the depth image to the image display side device, and the image display side device is a two-dimensional image transmitted from the image generation side device Luminance distribution means for generating a two-dimensional image for each display surface in which the luminance or transmissivity is independently changed for each display surface from the image and the depth image, and displaying the two-dimensional image on each display surface .
Here, the two-dimensional image and the depth image are transmitted to the image display side device by a parallel independent signal system.
Further, in the present invention, the image generation side device has multiplexing means for alternately multiplexing the two-dimensional image and the depth image by time division, and alternately time-divides the two-dimensional image and the depth image. The same signal system is transmitted to the image display side device, and the image display side device divides the two-dimensional image and the depth image multiplexed in time division alternately into a two-dimensional image and a depth image. It has the means.
In the present invention, the image generation side device includes multiplexing means for spatially dividing the two-dimensional image and the depth image into a single image and multiplexing the two-dimensional image and the depth image. A two-dimensional image and a depth which are spatially divided into one image and transmitted to the image display side by the same signal system, and the image display side device divides and multiplexes into the one image. It has a dividing means for dividing an image into a two-dimensional image and a depth image.

The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows.
According to the present invention, it is possible to transmit and receive an image necessary for a three-dimensional display method using the DFD method by using a transmission path used for transmitting a conventional two-dimensional display method image.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In all the drawings for explaining the embodiments, parts having the same functions are given the same reference numerals, and repeated explanation thereof is omitted.
First, a DFD type three-dimensional display device will be described.
[Example of DFD type 3D display device]
FIG. 8 is a diagram for explaining an example of a DFD type three-dimensional display device.
The three-dimensional display device shown in FIG. 8 sets a plurality of surfaces, for example, display surfaces (101, 102) (the display surface 101 is closer to the viewer 100 than the display surface 102) on the front surface of the viewer 100. In order to display a plurality of two-dimensional images on the display surfaces (101, 102), an optical system 103 is constructed using a two-dimensional display device and various optical elements.
Examples of the two-dimensional display device include a CRT, a liquid crystal display, an LED display, a plasma display, an EL display, an FED display, a DMD, a projection display, a line drawing type display such as an oscilloscope, and the like as an optical element. For example, a lens, a total reflection mirror, a partial reflection mirror, a curved mirror, a prism, a polarizing element, a wave plate, or the like is used.
Note that FIG. 8 has the same configuration as that described in the above-mentioned Patent Document 1, and refer to the above-mentioned Patent Document 1 for the method of setting the display surface.
In the three-dimensional display device shown in FIG. 8, as shown in FIG. 9, a three-dimensional object 104 to be presented to the observer 100 is transferred from the line of sight of both eyes of the observer 100 to the display surface (101, 102). Projected images (hereinafter referred to as “2D images”) (105, 106) are generated.
As a method for generating the 2D image, for example, a method using a two-dimensional image obtained by photographing a three-dimensional object 104 with a camera from the line-of-sight direction, a method of combining from a plurality of two-dimensional images taken from different directions, or There are various methods such as a computer graphic synthesis technique and a method using modeling.

As shown in FIG. 8, the 2D image (105, 106) overlaps both the display surface 101 and the display surface 102 as viewed from one point on the line connecting the right eye and the left eye of the viewer 100. To display. This can be achieved, for example, by controlling the arrangement of the center position and the gravity center position of each 2D image (105, 106) and the enlargement / reduction of each image.
On the apparatus having such a configuration, the luminance of each of the 2D images (105, 106) is changed in accordance with the depth position of the three-dimensional object 104 while keeping the overall luminance viewed from the observer 100 constant. Thus, a three-dimensional stereoscopic image of the three-dimensional object 104 is displayed.
An example of how to change the luminance of each 2D image (105, 106) will be described. Here, since it is a black and white drawing, for the sake of easy understanding, in the following drawings, the higher luminance is shown darker.
For example, when the three-dimensional object 104 is on the display surface 101, as shown in FIG. 10, the luminance of the 2D image 105 above is made equal to the luminance of the three-dimensional object 104, and 2D on the display surface 102 is displayed. The luminance of the converted image 106 is zero.
Next, for example, when the three-dimensional object 104 is slightly away from the viewer 100 and is slightly closer to the display surface 102 than the display surface 101, the brightness of the 2D image 105 is increased as shown in FIG. Slightly lower the brightness of the 2D image 106 slightly.

Next, for example, when the three-dimensional object 104 is further away from the observer 100 and is further away from the display surface 101 toward the display surface 102, the luminance of the 2D image 105 is increased as shown in FIG. Further down, the brightness of the 2D image 106 is further increased.
Further, for example, when the three-dimensional object 104 is on the display surface 102, the luminance of the 2D image 106 above is made equal to the luminance of the three-dimensional object 104 as shown in FIG. The brightness of the 2D image 105 is zero.
By displaying in this way, even if the 2D image (105, 106) is displayed due to the physiological or psychological factors or illusions of the observer (person) 100, it is as if the observer 100 It feels as if the three-dimensional object 104 is located in the middle of the display surface (101, 102).
For example, when a 2D image (105, 106) having substantially the same luminance is displayed on the display surface (101, 102), the three-dimensional object 104 appears near the middle of the depth position of the display surface (101, 102). I can feel it. In this case, the three-dimensional object 104 is perceived by the observer 100 with a stereoscopic effect.

In the above description, for example, the method of expressing the depth position of the entire three-dimensional object using, for example, a two-dimensional image displayed on the display surface (101, 102) has been described. It is obvious that the 3D display device can be used as a method of expressing the depth of the 3D object itself, for example.
An important point in expressing the depth of the three-dimensional object itself is that the brightness of each part of the 2D image (105, 106) is viewed from the observer 100 on the apparatus having the configuration shown in FIG. It is to change corresponding to the depth position of each part of the three-dimensional object 104 while keeping the overall luminance constant.
In the above description, the description has been given of the case where only two surfaces are mainly described among the surfaces on which the two-dimensional image is arranged, and the object to be presented to the observer is between the two surfaces. It is obvious that a three-dimensional stereoscopic image can be displayed by a similar method even when the number of surfaces on which images are arranged is larger than this or when the position of an object to be presented is different.
For example, there are three surfaces, a first three-dimensional object between the surface close to the observer 100 and the intermediate surface, and a second 3 between the intermediate surface and the surface far from the observer 100. When a three-dimensional object exists, a 2D image of the first three-dimensional object is displayed on a surface close to the observer 100 and an intermediate surface, and on the intermediate surface and a surface far from the observer 100. By displaying the 2D image of the second 3D object, it is possible to display 3D images of the first and second 3D objects.

Furthermore, regarding the case where the 2D image is moved three-dimensionally, the movement of the observer in the horizontal and vertical directions can be achieved by moving image reproduction on the display surface as in the case of a normal two-dimensional display device. Regarding the movement in the depth direction, the luminance of each of the 2D images (105, 106) is changed with time in the depth position of the three-dimensional stereoscopic image while keeping the overall luminance viewed from the observer 100 constant. It is clear that a moving image of a three-dimensional image can be expressed by changing it correspondingly.
For example, a case where a three-dimensional stereoscopic image moves from the display surface 101 to the display surface 102 in time will be described.
When the three-dimensional stereoscopic image is on the display surface 101, the luminance of the 2D image 105 on the display surface 101 is made equal to the luminance of the three-dimensional stereoscopic image, as shown in FIG. The luminance of the converted image 106 is zero.
Next, for example, when the three-dimensional stereoscopic image gradually moves away from the observer 100 in time and slightly approaches in time from the display surface 101 toward the display surface 102, as shown in FIG. Corresponding to the movement of the depth position of the three-dimensional stereoscopic image, the luminance of the 2D image 105 is slightly lowered in time, and the luminance of the 2D image 106 is slightly increased in time.

Next, for example, when the three-dimensional stereoscopic image is further distant from the observer 100 in time and moved to a position closer to the display surface 102 than the display surface 101, as shown in FIG. Corresponding to the movement of the depth position of the three-dimensional stereoscopic image, the luminance of the 2D image 105 is further lowered in time, and the luminance of the 2D image 106 is further raised in time.
Furthermore, for example, when the three-dimensional stereoscopic image has moved to the display surface 102 over time, as shown in FIG. 13, the 2D image above this is associated with the movement of the depth position of the three-dimensional stereoscopic image. The luminance of 106 is changed over time until it becomes equal to the luminance of the three-dimensional stereoscopic image, and is changed until the luminance of the 2D image 105 on the display surface 101 becomes zero.
By displaying in this way, even if a 2D image (105, 106) is displayed due to a human physiological or psychological factor or illusion, the viewer 100 is as if the display surface (101, 101) is displayed. 102), it is felt that the three-dimensional stereoscopic image moves from the display surface 101 to the display surface 102 in the depth direction.

In the above description, the case where the three-dimensional stereoscopic image moves from the display surface 101 to the display surface 102 has been described, but this moves from the halfway position between the display surfaces (101, 102) to the display surface 102. Or when moving from the display surface 101 to a mid-depth position between the display surfaces (101, 102) or from the mid-depth position between the display surfaces (101, 102). It is clear that the same can be done even when moving to another depth position in the middle.
In the above description, a description is given of a case where only two surfaces are mainly described among surfaces on which a 2D image is arranged, and a three-dimensional stereoscopic image presented to the observer 100 moves between the two surfaces. However, even if the number of planes on which a two-dimensional image is arranged is larger than this, or even when a three-dimensional object to be presented moves across multiple planes, a three-dimensional stereoscopic image is displayed using the same method. Obviously, similar effects can be expected.
In the above description, the case where one three-dimensional stereoscopic image moves in two planes on which two-dimensional images are arranged has been described. However, when a plurality of three-dimensional objects move, that is, displayed. When the two-dimensional image includes a plurality of object images having different movement directions, the luminance of the object image displayed on each display surface changes for each object image according to the movement direction and movement speed of the object. Obviously, you can do that.

[Other examples of DFD type 3D display devices]
FIG. 14 is a diagram for explaining another example of the DFD type three-dimensional display device as a premise of the present invention.
The three-dimensional display device shown in FIG. 14 has a plurality of transmissive display devices, for example, transmissive display devices (111, 112) (the transmissive display device 111 is more observable than the transmissive display device 112 in front of the observer 100. The optical system 103 is constructed using various optical elements and a light source 110. That is, in this embodiment, the transmissive display devices (111, 112) are used in place of the display surfaces (101, 102) in FIG.
Examples of the transmissive display device (111, 112) include a twisted nematic liquid crystal display, an in-plane liquid crystal display, a homogeneous liquid crystal display, a ferroelectric liquid crystal display, a guest-host liquid crystal display, and a polymer dispersed liquid crystal. A display, a holographic polymer dispersed liquid crystal display, or a combination thereof is used. In addition, as the optical element, for example, a lens, a total reflection mirror, a partial reflection mirror, a curved mirror, a prism, a polarization element, a wave plate, or the like is used.
FIG. 14 shows a case where the light source 110 is arranged farthest rearward when viewed from the observer 100. FIG. 14 has the same configuration as that described in Patent Document 2 described above. .

Also in the three-dimensional display device shown in FIG. 14, as shown in FIG. 9, the three-dimensional object 104 desired to be presented to the viewer 100 is viewed from the viewer 100, and the transmissive display device (111, 112) is displayed. A projected 2D image (107, 108) is generated.
As shown in FIG. 14, the 2D image (107, 108) is displayed on each of the transmission display device 111 and the transmission display device 112 from one point on the line connecting the right eye and the left eye of the observer 100. The two-dimensional images (107, 108) are displayed so as to overlap.
This can be achieved, for example, by controlling the arrangement of the center position and the gravity center position of each 2D image (107, 108) and the enlargement / reduction ratio of each image.
On the apparatus having the above-described configuration, an image viewed by the observer 100 is generated by light emitted from the light source 110, transmitted through the 2D image 108, and further transmitted through the 2D image 107.
In the three-dimensional display device shown in FIG. 14, the distribution of the transmittance of each of the 2D images (107, 108) is kept constant on the device having the above-described configuration while keeping the overall luminance as viewed from the observer 100 constant. A three-dimensional stereoscopic image of the three-dimensional object existing between the transmissive display device 111 and the transmissive display device 112 is displayed in accordance with the depth position of the three-dimensional object 104.

An example of how to change the transparency of each of the 2D images (107, 108) will be described.
For example, when the three-dimensional object 104 is on the transmissive display device 111, the transparency on the transmissive display device 111 is set so that the luminance of the 2D image 107 is equal to the luminance of the three-dimensional object 104. For example, the transparency of the portion of the 2D image 108 on the transmissive display device 112 is set to the maximum value of the transmissive display device 112.
Next, for example, when the three-dimensional object 104 is slightly away from the observer 100 and is slightly closer to the transmissive display device 112 than the transmissive display device 111, the 2D display on the transmissive display device 111 is performed. The transmittance of the portion of the image 107 is slightly increased, and the transmittance of the portion of the 2D image 108 on the transmissive display device 112 is slightly decreased.
Next, for example, when the three-dimensional object 104 is further away from the viewer 100 and is closer to the transmissive display device 112 than the transmissive display device 111, 2D conversion on the transmissive display device 111 is performed. The transmittance of the portion of the image 107 is further increased, and the transmittance of the portion of the 2D image 108 on the transmissive display device 112 is further decreased.
Further, for example, when the three-dimensional object 104 is on the transmissive display device 112, the transmittance on the transmissive display device 112 is set so that the luminance of the 2D image 108 is equal to the luminance of the three-dimensional object 104. For example, the transparency of the portion of the 2D image 107 on the transmissive display device 111 is set to the maximum value of the transmissive display device 111.

By displaying in this way, even if a 2D image (107, 108) is displayed due to a physiological or psychological factor or illusion of the observer (person) 100, the observer 100 is as if it is displayed. It feels as if the three-dimensional object 104 is located in the middle of the transmissive display device (111, 112).
That is, for example, when a 2D image (107, 108) having substantially the same luminance is displayed on the transmissive display device (111, 112), 3 near the middle of the depth position of the transmissive display device (111, 112). A dimensional object 104 is felt. In this case, the three-dimensional object 104 is perceived by the observer 100 with a stereoscopic effect.
In the above description, for example, the method of expressing the depth position of the entire three-dimensional object using, for example, a two-dimensional image displayed on the transmissive display device (111, 112) has been mainly described. It is obvious that the three-dimensional display device shown in FIG. 14 can also be used as a method of expressing the depth of the three-dimensional object itself, for example, by a method similar to the method described in the three-dimensional display device shown in FIG.
In the three-dimensional display device shown in FIG. 14 as well, when the 2D image is moved three-dimensionally by the same method as that described in the three-dimensional display device shown in FIG. The movement in the vertical direction is possible by moving image reproduction in the transmissive display device as in the case of a normal two-dimensional display device, and the movement in the depth direction is transmitted through a plurality of transmissive display devices. It is obvious that a moving image of a three-dimensional stereoscopic image can be expressed by temporally changing the degree.

In the DFD type three-dimensional display device, the luminance viewed from the observer 100 on each display surface is changed for each display surface to display a three-dimensional stereoscopic image.
That is, in the three-dimensional display device shown in FIG. 8, the distribution of the luminance of each 2D image (105, 106) is kept constant in the overall luminance viewed from the observer 100, while the depth of the three-dimensional object 104 is kept constant. A three-dimensional stereoscopic image is displayed in accordance with the position.
Further, in the three-dimensional display device shown in FIG. 14, the distribution of the transmissivity of each of the 2D images (107, 108) is kept constant for the three-dimensional object 104 while keeping the overall luminance as viewed from the observer 100 constant. A three-dimensional stereoscopic image is displayed by changing in accordance with the depth position.
As described above, in the 3D display device shown in FIG. 8, the luminance of the 2D image displayed on the surface closer to the 3D object 104 is set to the 2D image displayed on the surface far from the 3D object 104. In the 3D display device shown in FIG. 14, the transparency of the 2D image displayed on the transmission type display device closer to the 3D object 104 is set to the 3D object 104. The difference is that the transmittance of the 2D image displayed on the farther transmissive display device is reduced.
Therefore, in the 3D display device shown in FIG. 14, when the depth of the 3D object itself is expressed using the same method as the 3D display device shown in FIG. 8, or a moving image of a 3D stereoscopic image is expressed. In the case of increasing the luminance of the 2D image displayed on each display surface in the 3D display device shown in FIG. 8, the transmittance of the 2D image displayed on each transmissive display device is increased. In the three-dimensional display device shown in FIG. 14, when the luminance of the 2D image displayed on each display surface is decreased, the transparency of the 2D image displayed on each transmissive display device is increased. It may be increased.

[Example 1]
FIG. 1 is a block diagram for explaining a three-dimensional display method according to the first embodiment of the present invention.
In this embodiment, a two-dimensional image 201 and a depth image 202 are output as image outputs from the image generation unit 205 of the image generation side device 203 and input to the luminance distribution unit 206 of the image display side device 204.
Then, the luminance distribution unit 206 generates a two-dimensional image with varying luminance (or transparency), displays the two-dimensional image on the display unit (207, 208, 209), and uses the DFD method described above. A three-dimensional stereoscopic image is displayed by a three-dimensional display method. Note that the number of display means is not necessarily three as shown in FIG. 1, and may be two or more.
In this embodiment, a two-dimensional image 201 and a depth image 202 are used as an image transmission method between the image generation side device 203 and the image display side device 204.
The depth image 202 is configured as a grayscale image by replacing information in the depth direction (Z of X, Y, and Z) of a three-dimensional object with luminance information.
The information about the depth direction of the three-dimensional object is obtained by measuring the distance from the camera position to the three-dimensional object with a distance measuring device when photographing the three-dimensional object with the camera from the line-of-sight direction. Can be generated.
This method has the merit that the amount of image data is smaller than the method of independently transferring two-dimensional images for a plurality of display means, and the transferred images are the same even if the number of display means is changed. is there.

As described above, the important point of the three-dimensional display device that is the basis of the present invention is that the luminance of each 2D image (105, 106) or the transmittance of each 2D image (107, 108) is determined. In other words, the overall luminance viewed from the observer 100 is changed in accordance with the depth position of the three-dimensional object 104 while keeping constant.
Therefore, by using the two-dimensional image 201 and the depth image 202 as images to be transmitted from the image generation side device 203 to the image display side device 204, the two-dimensional video displayed on each display surface in the image display side device 204. It is possible to generate data.
For example, when the three-dimensional object 104 is in the middle of the depth position of the display surface (101, 102), the image generation side device 203 replaces the depth image 202 obtained by replacing information in the depth direction of the three-dimensional object 104 with luminance information. And transmitted to the image display side device 204.
When the image display side device 204 has two display means for changing the luminance, the image display side device 204 divides the transmitted luminance information on a one-to-one basis based on the depth image 202. By displaying the 2D images (105, 106) with substantially equal luminance on the two display means, a three-dimensional solid is provided so that the three-dimensional object 104 is near the middle of the depth position of the two display means. An image can be displayed.

In the present embodiment, it is possible to reduce the amount of image data transmitted from the image generation side device 203 to the image display side device 204. For example, when the two-dimensional image 201 is 8 bits in 3 channels (R, G, B) and the depth image 202 is 8 bits in 1 channel (monochromatic gradation image), the data amount of the transmitted image is The number of display means is two, which can be reduced to 2/3 as compared with the case of transmitting two two-dimensional images for each display means.
Specifically, 6 channels of R, G, B, R, G, and B are reduced to 4 channels of R, G, B, and Z. Further, when the number of display means is two or more, the data amount can be further reduced.
In addition, as shown in FIG. 2, two-dimensional image 201 and depth image 202 can be transmitted separately by using two conventional two-dimensional image transmission paths, and a dedicated transmission path for three-dimensional images. The conventional transmission line can be utilized without preparing the network.
The transmission of the two-dimensional image 201 can be transmitted in the same manner as the conventional two-dimensional image. However, in the transmission of the depth image 202, specifically, for example, an RGB interface (analog RGB, digital RGB, DVI, etc. R, G, B Are used, the depth image 202 is transmitted using one of the R, G, and B signal interfaces, or the same signal is transmitted to all the R, G, and B interfaces. There is.
In the above description, the RGB interface has been described as an example, but the transmission of the two-dimensional image 201 is performed in the same manner as the conventional two-dimensional image even if another type of interface capable of transmitting a two-dimensional image is used. The depth image 202 can be transmitted in the same manner as the RGB interface by treating it as a single color (grayscale) image.

[Example 2]
In the above-described embodiment, the two-dimensional image 201 and the depth image 202 are independently transmitted from the image generation side device 203 to the image display side device 204 using two transmission paths. By transmitting the two-dimensional image 201 and the depth image 202 alternately by time-sharing on the axis, it can be transmitted through one transmission line.
As shown in FIG. 3, the image generation side device 203 alternately multiplexes the two-dimensional image 201 and the depth image 202 by time division using a multiplexing unit 210 that multiplexes them in a time division manner. An image multiplexed by the dividing unit 211 of 204 is divided into a two-dimensional image 201 and a depth image 202.
As a unit to be divided and multiplexed alternately, it is possible to multiplex and deliver to the same one-system transmission path by time-division alternately by a single frame unit or a single field unit.
In addition, it is also possible to time-division alternately in a single line unit or a plurality of line units and multiplex them to the same one system transmission path.
Furthermore, it is also possible to multiplex and transfer to the same one system transmission path by time-division alternately or in units of a plurality of pixels. Alternatively, it is also possible to time-division alternately in units of blocks in which a plurality of pixels are collected and to multiplex and transfer them to the same one-system transmission path.

[Example 3]
The interior of one image to be transmitted is spatially divided, and the two-dimensional image 201 and the depth image 202 are spatially multiplexed to be transmitted as one image from the image generation side device 203 to the image display side device 204. be able to.
As shown in FIG. 4, a two-dimensional image 201 and a depth image 202 are generated by an image generation side device 203, spatially multiplexed into one image by a multiplexing unit 212, and an image is displayed from the image generation side device 203. The image data is transmitted to the side device 204 by a transmission method similar to that for a normal two-dimensional image, and the image display-side device 204 divides the multiplexed two-dimensional image and depth image by the dividing unit 213.
As a result, a transmission path that can transmit a conventional two-dimensional image can be used as it is, and transmission can be performed using a single transmission path.
As a method of spatially dividing the two-dimensional image 201 and the depth image 202 in the multiplexing unit 212, as shown in FIG. 5, a method of dividing one image into left and right, or dividing up and down. There is a way. Of course, it is also possible to divide each image vertically and horizontally after image operations such as rotating each image by 90 degrees.
Further, as shown in FIG. 6, a method of dividing a single image in the horizontal direction by a single line or a plurality of lines, and a method of dividing by a single line or a plurality of lines in the vertical direction are possible.
Furthermore, as shown in FIG. 7, it is also possible to alternately divide one image into blocks in the horizontal direction or the vertical direction. This block is constituted by a collection of a plurality of pixels. Moreover, it is also possible to divide a single pixel alternately like a block.
As mentioned above, the invention made by the present inventor has been specifically described based on the above embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Of course.

It is a block diagram for demonstrating the three-dimensional display method of Example 1 of this invention. It is a figure for demonstrating the transmission method of the two-dimensional image and depth image from the image generation side apparatus to the image display side apparatus side in the three-dimensional display method of Example 1 of this invention. It is a figure for demonstrating the transmission method of the two-dimensional image and depth image from the image generation side apparatus to the image display side apparatus side in the three-dimensional display method of Example 2 of this invention. It is a figure for demonstrating the transmission method of the two-dimensional image and depth image from the image generation side apparatus to the image display side apparatus side in the three-dimensional display method of Example 3 of this invention. FIG. 5 is a diagram illustrating an example of a method of spatially multiplexing a two-dimensional image and a depth image in the multiplexing unit illustrated in FIG. 4. FIG. 5 is a diagram illustrating another example of a method of spatially multiplexing a two-dimensional image and a depth image in the multiplexing unit illustrated in FIG. 4. FIG. 5 is a diagram illustrating another example of a method of spatially multiplexing a two-dimensional image and a depth image in the multiplexing unit illustrated in FIG. 4. It is a figure which shows schematic structure of the three-dimensional display apparatus used as the basis of this invention. It is a figure for demonstrating the production | generation method of the 2D-ized image displayed on each display surface in the three-dimensional display apparatus used as the foundation of this invention. It is a figure for demonstrating the display principle of the three-dimensional display apparatus used as the basis of this invention. It is a figure for demonstrating the display principle of the three-dimensional display apparatus used as the basis of this invention. It is a figure for demonstrating the display principle of the three-dimensional display apparatus used as the basis of this invention. It is a figure for demonstrating the display principle of the three-dimensional display apparatus used as the basis of this invention. It is a figure for demonstrating the other example of the DFD type three-dimensional display apparatus used as the premise of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Observer 101,102 Display surface 103 Optical system 104 Three-dimensional object 105,106,107,108 2D image 111,112 Transmission type display device 110 Light source 201 Two-dimensional image 202 Depth image 203 Image generation side device 204 Image display side Device 205 Image generating means 206 Luminance distributing means 207, 208, 209 Display means 210, 212 Multiplexing means 211, 213 Dividing means

Claims (14)

On the image display side, two-dimensional images are respectively displayed on a plurality of display surfaces at different depth positions as viewed from the observer, and the brightness or transmittance of the two-dimensional images displayed on the display surfaces is displayed on the display surfaces. A three-dimensional display method for displaying a three-dimensional stereoscopic image by changing each independently.
A two-dimensional image and a depth image are transmitted from the image generation side to the image display side;
On the image display side, the two-dimensional image for each display surface in which the luminance or the transmittance is changed independently for each display surface from the two-dimensional image and the depth image transmitted from the image generation side. And displaying a two-dimensional image for each display surface on each display surface to display a three-dimensional stereoscopic image.   The three-dimensional display method according to claim 1, wherein the two-dimensional image and the depth image are transmitted from the image generation side to the image display side in parallel independent signal systems.   The three-dimensional display method according to claim 1, wherein the two-dimensional image and the depth image are alternately time-divided and transmitted by the same signal system from the image generation side to the image display side.   4. The three-dimensional display method according to claim 3, wherein the time division unit is any one of a frame unit, a field unit, a line unit, a pixel unit, a block unit, or a plurality of combinations.   The three-dimensional image according to claim 1, wherein the two-dimensional image and the depth image are transmitted in the same signal system after being spatially divided into one image from the image generation side to the image display side. Display method.   The three-dimensional display method according to claim 5, wherein the space division is performed on the left and right or the top and bottom of one image.   6. The three-dimensional display method according to claim 5, wherein the space division is performed by alternately dividing a single image in a horizontal direction or a vertical direction in units of lines, pixels, or blocks. A two-dimensional image is displayed on each of a plurality of display surfaces at different depth positions as viewed from the observer, and the brightness or transmittance of the two-dimensional image displayed on each display surface is independently determined for each display surface. An image generation-side device that transmits a two-dimensional image for displaying a three-dimensional stereoscopic image to an image display-side device that displays a three-dimensional stereoscopic image by changing,
An image generation side device comprising image generation means for generating a two-dimensional image and a depth image and transmitting them to the image display side device.   9. The image generation side device according to claim 8, wherein the two-dimensional image and the depth image are transmitted to the image display side device by a parallel independent signal system. A multiplexing means for alternately multiplexing the two-dimensional image and the depth image in a time division manner;
9. The image generation side device according to claim 8, wherein the two-dimensional image and the depth image are alternately time-divided and transmitted to the image display side device using the same signal system. Multiplexing means for spatially dividing and multiplexing the two-dimensional image and the depth image into one image;
9. The image generation apparatus according to claim 8, wherein the two-dimensional image and the depth image are spatially divided into one image and transmitted to the image display side using the same signal system. A two-dimensional image is displayed on each of a plurality of display surfaces at different depth positions as viewed from the observer, and the brightness or transmittance of the two-dimensional image displayed on each display surface is independently determined for each display surface. An image display side device that displays a three-dimensional stereoscopic image by changing,
For each display surface, the brightness or the transmittance is changed independently for each display surface from the two-dimensional image and the depth image transmitted from the image generation side device according to claim 8 or 9. An image display-side apparatus, comprising: a luminance distribution unit that generates a two-dimensional image of and displays the two-dimensional image on each display surface.   11. The image processing apparatus according to claim 10, further comprising a dividing unit that divides the two-dimensional image and the depth image, which are alternately multiplexed by time division, transmitted from the image generation apparatus side into a two-dimensional image and a depth image. The image display side device according to claim 12. 11. A dividing unit that divides a two-dimensional image and a depth image into two-dimensional images and a depth image, which are transmitted from the image generation device side according to claim 10 and are spatially divided and multiplexed in the one image. The image display side device according to claim 12, further comprising:

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