JP2009237310A - False three-dimensional display method and false three-dimensional display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a false three-dimensional stereoscopic display method capable of easily falsely displaying a three-dimensional stereoscopic image with no depth information and without distributing luminance to respective display surfaces. <P>SOLUTION: In the false three-dimensional stereoscopic display method for falsely displaying the three-dimensional stereoscopic image by displaying two-dimensional images to be superposed on each other as seen from an observer on a plurality of display surfaces at different depth positions as seen from the observer, one two-dimensional image is displayed on each display surface by using different luminance characteristics by display surface. A γ function having a different γ value is used as the luminance characteristics of each display surface. Alternatively, such luminance characteristics that two curves obtained when the luminance characteristics of the two adjacent display surfaces is expressed as a graph, where a luminance value of an input image is set as an axis of abscissa and a luminance value displayed on the display surface is set as an axis of ordinate, cross at one spot is used as the luminance characteristics of each display surface. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pseudo three-dimensional display method and a pseudo three-dimensional display device, and in particular, uses a two-dimensional image without depth information as an input image and displays it on each DFD display screen without using distance information of the input image. The present invention relates to a technique for generating each two-dimensional image and displaying a pseudo 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-Fused-3D) 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. To display a three-dimensional stereoscopic image.
[Example of DFD 3D Display Device which is the Basic of the Present Invention]
A DFD type three-dimensional display device that is the basis of the present invention will be described below with reference to FIGS. 1 to 6 are drawings described in FIGS. 1 to 6 in the above-mentioned Patent Document 1. FIG.
In the three-dimensional display device shown in FIG. 1, 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) are set 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.
In the three-dimensional display device shown in FIG. 1, as shown in FIG. 2, a three-dimensional object 104 desired 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. 1, the 2D image (105, 106) overlaps both the display surface 101 and the display surface 102 as seen from one point on the line connecting the right eye and the left eye of the viewer 100, respectively. 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.
An important point of the three-dimensional display device that is the basis of the present invention is that the luminance of each of the 2D images (105, 106) on the device having the above-described configuration is the total luminance viewed from the observer 100. It is to change corresponding to the depth position of the three-dimensional object 104 while keeping constant.
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. 3, 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 observer 100 and is slightly closer to the display surface 102 than the display surface 101, the luminance 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 viewer 100 and is further away from the display surface 101 toward the display surface 102, the brightness of the 2D image 105 is increased as shown in FIG. Further down, the brightness of the 2D image 106 is further increased.
Finally, for example, when the three-dimensional object 104 is on the display surface 102, the luminance of the 2D image 106 on the display surface 102 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 illusion of the viewer 100, the viewer 100 will feel as if the display surface ( 101, 102), it is felt that the three-dimensional object 104 is located in the middle.
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.
As the above-described two-dimensional display device, for example, 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 are used as optical elements. 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.

In the three-dimensional display device that is the basis of the present invention, a two-dimensional image displayed on the display surface (101, 102) is generated by, for example, an image generation device 210 shown in FIG. The input image 200 input to the image generation apparatus 210 includes an RGB image 211 and a Z image (distance image corresponding to the RGB image) 212.
The image generation apparatus 210 displays the input RGB image 211 and Z image (distance image corresponding to the RGB image) 212 on the display surface (101, 102) according to the depth position for displaying the three-dimensional stereoscopic image. The luminance of each pixel of the two-dimensional image is calculated, that is, luminance conversion processing (luminance distribution processing) for distributing the luminance to each image is performed, and the two-dimensional image displayed on the display surface (101, 102) (FIG. 7). 2D image 1 and 2D image 2) are generated.
As described above, in the three-dimensional display method of the DFD method described in Patent Document 1 described above, as input information for displaying a three-dimensional stereoscopic image, a two-dimensional image and depth information for each image of the two-dimensional image ( Distance information) is required. Furthermore, in the DFD-type three-dimensional display method described in Patent Document 1, in order to display a three-dimensional stereoscopic image, a three-dimensional solid is obtained from a two-dimensional image and a depth image (distance information) for the two-dimensional image. Luminance conversion processing (luminance distribution processing) for calculating the luminance of each pixel of the two-dimensional image displayed on each display surface according to the depth position for displaying the image and distributing the luminance to each image is necessary.

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

In a real image, for example, a real image captured by a normal camera, only the texture information is obtained, and depth information indicating the depth position where the object exists cannot be acquired.
On the other hand, in the DFD three-dimensional display method described in Patent Document 1, a two-dimensional image displayed on each display surface using depth information of each pixel of the two-dimensional image in order to display a three-dimensional stereoscopic image. The brightness of each pixel is obtained.
For this reason, the brightness of each pixel of the two-dimensional image displayed on each display surface cannot be obtained from one image captured by a normal camera.
Further, in the DFD three-dimensional display method described in Patent Document 1 described above, luminance conversion processing for performing luminance distribution according to depth information is performed on each pixel of a two-dimensional image displayed on each display surface. It was necessary.
The present invention has been made to solve the problems of the prior art, and an object of the present invention is to simulate a three-dimensional solid without depth information and without distributing luminance to each display surface. An object of the present invention is to provide a pseudo three-dimensional stereoscopic display method and a pseudo three-dimensional stereoscopic display device capable of easily displaying an image.
The above and other objects and novel features of the present invention will become apparent from the description of this specification and attached drawings.

Of the inventions disclosed in this application, the outline of typical ones will be briefly described as follows.
(1) A pseudo three-dimensional display method for displaying a two-dimensional image so as to overlap with a plurality of display surfaces at different depth positions as viewed from the observer and displaying a pseudo three-dimensional stereoscopic image. In this case, one two-dimensional image is displayed on each display surface by using different luminance characteristics or transmittance characteristics for each display surface.
(2) In (1), a γ function having a different γ value is used as the luminance characteristic or transmittance characteristic of each display surface.
(3) In (2), the γ value of the luminance characteristic of the display surface in front of the observer among the two adjacent display surfaces is the luminance characteristic of the display surface in the back as viewed from the observer. It is a value larger than the γ value.
(4) In (1), as the luminance characteristics or transmissivity characteristics of each display surface, two adjacent displays with the luminance value of the input image as the horizontal axis and the luminance value or transmissivity displayed on the display surface as the vertical axis When the luminance characteristic or the transmission characteristic of the surface is represented in a graph, the luminance characteristic or the transmission characteristic is used such that two obtained curves intersect at one place.
(5) In (4), the luminance characteristics of the two adjacent display surfaces are such that when the input image has a small luminance value, the luminance value of the display surface in the back as viewed from the observer is the observer. When the luminance value of the input image is a large value, the luminance value of the display surface in front of the observer is viewed from the observer. The value is larger than the luminance value of the display surface in the back.
(6) Further, the present invention is a pseudo 3D stereoscopic display device that executes the above-described pseudo 3D stereoscopic display method.

The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows.
According to the pseudo 3D stereoscopic display method and the pseudo 3D stereoscopic display apparatus of the present invention, it is possible to easily display a pseudo 3D stereoscopic image without depth information and without distributing luminance to each display surface. Become.

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.
[Example 1]
FIG. 8 is a block diagram illustrating a configuration of the image generation device 220 used in the pseudo 3D stereoscopic display device according to the first embodiment of the present invention. FIG. 8 illustrates a configuration in the case where there are two display surfaces 101 and 102.
In the present embodiment, the input image 200 is, for example, information of only a texture such as a real image captured by a normal camera, and does not have depth information indicating a depth position where an object exists.
The image generation apparatus 220 has luminance characteristics (correspondence between the pixel value of the input image and the pixel value of the output image) (221, 222) of each display surface 101 and 102, and receives each input image as an input. The output is a two-dimensional image (two-dimensional image 1 and two-dimensional image 2 in FIG. 8) output to the display surface. The input image 200 may be either an image having only a luminance value or a color image.
The image generation apparatus 220 holds the luminance characteristics (221, 222) in which the “correspondence between the luminance value of the input image and the luminance value to be displayed on the display surface” is recorded for each display surface in the form of a table, for example. Yes.
In this embodiment, the image generation apparatus 220 does not distribute the luminance to each display surface, but refers to the luminance characteristics (221, 222) of each display surface (101, 102) to input the image. A two-dimensional image to be displayed on each display surface (101, 102) is generated from the image 200.
Here, when the input image 200 is a grayscale image, one luminance characteristic is assigned to each display surface (101, 102). When the input image 200 is a color image, the luminance characteristics of each display surface (101, 102) may be configured by three luminance characteristics represented by R, G, and B.
The present invention is a method and apparatus for generating a two-dimensional image to be displayed on each display surface from one input image (two-dimensional image) 200, and an apparatus configuration for three-dimensionally displaying the generated two-dimensional image. As described above, the apparatus configuration described in Patent Document 1 can be used.

[Luminance characteristics 1]
In this embodiment, the luminance characteristics assigned to each display surface are different from each other, and a two-dimensional image displayed on each display surface generated from one input image is an image having a different luminance distribution. Hereinafter, an example of the luminance characteristic (221, 222) of each display surface (101, 102) will be described.
In the 3D stereoscopic display device of the DFD system, the observer perceives the depth due to the difference in the luminance value of the two-dimensional images displayed on the plurality of display surfaces, so that the luminance distribution of the two-dimensional images displayed on each display surface is reduced. If there is a difference, the observer will perceive the depth according to the difference in brightness.
For example, an example of a specific operation of this embodiment will be described with reference to FIG.
FIG. 9 is a diagram for explaining an example of the luminance characteristic in the pseudo three-dimensional stereoscopic display method according to the embodiment of the present invention.
In the three-dimensional display method of the DFD method having two display surfaces (101, 102), the front display surface (display surface 101 in FIG. 9A) viewed from the observer 100 is placed on the display surface in FIG. 9B. A two-dimensional image 15 to be displayed on the front display surface 101 is generated by assigning the luminance characteristic indicated by 111, and the rear display surface (display surface 102 in FIG. 9A) viewed from the viewer 100 is displayed on the display surface 101 of FIG. The two-dimensional image 16 to be displayed on the rear display surface 102 is generated by assigning the luminance characteristic indicated by 112 in FIG.
The graph of FIG. 9B is a graph showing the luminance characteristics of each display surface (101, 102), the horizontal axis is the luminance value of the input image, and the vertical axis is displayed on each display surface (101, 102). This is the brightness value of the image to be played.
Similarly, the graph of FIG. 9C is a graph showing the luminance value (total luminance) of the sum of the luminance values displayed on the two display surfaces (101, 102), and the horizontal axis represents the luminance value of the input image, The vertical axis represents the luminance value (total luminance) of the sum of the luminance values displayed on the two display surfaces (101, 102).

As shown in FIG. 9A, depth information perceived by the viewer 100 when the two-dimensional images 15 and 16 are displayed on the display surfaces 101 and 102, respectively, is shown in FIG. 9D. The graph of FIG. 9D is a graph showing the depth position (apparent depth position) of the 3D stereoscopic image perceived by the observer 100 when the 3D stereoscopic image is observed, and the horizontal axis is the input. The luminance value of the image, and the vertical axis is the apparent depth position.
In FIG. 9D, the vertical axis (apparent depth position) “1” represents that a three-dimensional image is perceived at the same depth position as the display surface 101 in front of the viewer 100. “0” represents that a three-dimensional image is perceived at the same depth position as the display surface 102 on the back side when viewed from the viewer 100. The apparent depth position of 0.5 indicates the depth position of “center of depth position” in FIG.
When the luminance characteristics as shown in FIG. 9A are assigned to the respective display surfaces (101, 102), as shown in FIG. 9D, the observer 100 applies to all the luminance values of the input image. The apparent depth position is that the three-dimensional stereoscopic image 14 is perceived in front of the observer 100 with respect to the center of the depth position (vertical axis of FIG. 9D, corresponding to the apparent depth position 0.5). Become. That is, the observer 100 has a display surface at the position of the three-dimensional stereoscopic image 14 in FIG. 9A, and it is perceived as equivalent to the case where the input image is displayed on this display surface.
The different shapes of the graphs 111 and 112 in FIG. 9B indicate that different luminance characteristics are assigned to the two display surfaces (101, 102) on the front surface and the rear surface as viewed from the viewer 100. When viewed from the observer 100, as shown in FIG. 9C, the luminance value (total luminance) of the sum of the luminance values displayed on the two display surfaces (101, 102) is observed. Note that when the total luminance of the three-dimensional stereoscopic image 14 is increased, there is an effect that it is perceived as a high-quality three-dimensional stereoscopic image with a bright stereoscopic effect.
9B is the luminance characteristic of the display surface 102 in FIG. 9A, and the graph 112 in FIG. 9B is the luminance characteristic of the display surface 101 in FIG. 9A. In this case, the viewer 100 perceives a three-dimensional stereoscopic image in the back as viewed from the viewer 100 rather than the depth center position.

[Luminance characteristics 2]
Generally, the luminance characteristic of a display device is expressed by a γ function. Therefore, when the γ function is used as the luminance characteristic (221, 222) of each display surface (101, 102) possessed by the image generation apparatus 220, a two-dimensional image having a natural luminance distribution as seen by a person can be generated. There is an effect of becoming.
Furthermore, when the luminance characteristics as shown by 111 in FIG. 10A are assigned to the front surfaces of the two display surfaces (101, 102) and 112 shown in FIG. 10A are assigned to the rear surfaces, that is, assigned to the front surfaces. When a γ function in which the luminance value of the luminance characteristic is always larger than the luminance value of the luminance characteristic assigned to the rear surface is assigned to the front and rear display surfaces (101, 102), the observer At 100, the high brightness area is perceived as being in front of the low brightness area.
Since humans naturally feel a three-dimensional stereoscopic image in which a bright part is displayed in the foreground and a dark part is displayed in the distance, the front surface of the two display surfaces (101, 102) is 111 in FIG. When the luminance characteristic as indicated by 112 in FIG. 10A is assigned, an effect is obtained that the generated pseudo three-dimensional stereoscopic image becomes a natural image as seen from the human eye.
FIG. 10 is a diagram for explaining another example of the luminance characteristic in the pseudo three-dimensional stereoscopic display method according to the embodiment of the present invention.
The graph of FIG. 10A is a graph showing the luminance characteristics of each display surface (101, 102), the horizontal axis is the luminance value of the input image, and the vertical axis is the image displayed on each display surface (101, 102). Luminance value.
The graph of FIG. 10B is a graph showing the luminance value (total luminance) of the sum of the luminance values displayed on the two display surfaces (101, 102), the horizontal axis is the luminance value of the input image, and the vertical axis is This is the luminance value (total luminance) of the sum of the luminance values displayed on the two display surfaces (101, 102).
The graph of FIG. 10C is a graph showing the depth position (apparent depth position) of the 3D stereoscopic image perceived by the observer 100 when the 3D stereoscopic image is observed, and the horizontal axis represents the input image. The luminance value and the vertical axis are the apparent depth positions.

[Luminance characteristics 3]
The pseudo three-dimensional stereoscopic image displayed by the above-described luminance characteristics 1 and 2 is perceived only on the near side or the far side of the intermediate position between the two display surfaces (101, 102) when viewed from the observer 100. .
The display surface 102 on the back side as viewed from the viewer 100 has higher brightness than the display surface 101 on the front side, and the display surface 101 on the front side as viewed from the viewer 100 is on the back side. If both situations occur when the brightness is higher than that of the display surface 102, a pseudo three-dimensional stereoscopic image can be obtained both before and after an intermediate position between the two display surfaces (101, 102).
When the luminance characteristics as shown in FIG. 11 (a) 111 are assigned to the front surface as viewed from the observer 100 on the two display surfaces (101, 102) and the rear surface is indicated by 112 in FIG. 11 (a), that is, before and after When the luminance characteristics such that the luminance characteristics of the two display surfaces (101, 102) intersect at some point from the dark part to the bright part are assigned to the two front and rear display surfaces (101, 102), A pseudo three-dimensional stereoscopic image can be obtained both before and after an intermediate position between the two display surfaces (101, 102).
Therefore, in this case, the displayable range in the depth direction of the displayed pseudo three-dimensional stereoscopic image can be widened.
Further, since the front and rear display surfaces (101, 102) are displayed in an overlapping manner, the total luminance value observed by the observer 100 is as shown in FIG. 11B, and is a three-dimensional solid viewed from the observer 100. The apparent depth position of the image has the characteristics shown in FIG.
As shown in FIG. 11C, the observer 100 is closer to the near side when viewed from the observer 100 than the center position of the depth in the bright area, and closer to the rear side when viewed from the observer center than the center position of the depth in the dark area. Since a 3D stereoscopic image is perceived, an uneven 3D stereoscopic image can be displayed.

FIG. 11 is a diagram for explaining another example of the luminance characteristic in the pseudo three-dimensional stereoscopic display method according to the embodiment of the present invention.
The graph of FIG. 11A is a graph showing the luminance characteristics of each display surface (101, 102), the horizontal axis is the luminance value of the input image, and the vertical axis is the image displayed on each display surface (101, 102). Luminance value.
The graph of FIG. 11B is a graph showing the luminance value (total luminance) of the sum of the luminance values displayed on the two display surfaces (101, 102), the horizontal axis is the luminance value of the input image, and the vertical axis is This is the luminance value (total luminance) of the sum of the luminance values displayed on the two display surfaces (101, 102).
The graph of FIG. 11C is a graph showing the depth position (apparent depth position) of the 3D stereoscopic image perceived by the observer 100 when the 3D stereoscopic image is observed, and the horizontal axis represents the input image. The luminance value and the vertical axis are the apparent depth positions.
As a specific example of the luminance characteristic, the luminance characteristic of the rear display surface 102 is given by a γ function having γ of 1.0, and the luminance characteristic of the front display surface 101 is a value smaller than 1.0. The luminance characteristic of the two front and rear display surfaces (101, 102) intersects at some point from the dark part to the bright part.
In the above description, the image generation device 220 is configured to hold the luminance characteristics of the display surfaces (101, 102) and generate a two-dimensional image to be displayed on the display surfaces (101, 102). The characteristics are different for each display device. For example, in order to express an accurate depth position of a three-dimensional stereoscopic image, it may be necessary to align the γ characteristics of a two-dimensional display device that displays before and after.
Further, when the types of display devices are different, such as a CRT and a plasma display, the γ characteristic changes. For example, the γ value of CRT is 1.8, and the γ value of the display is 2.2. Therefore, when the display device is changed, an effect equivalent to changing the γ characteristic, that is, the luminance characteristic may be obtained.
In the above description, the configuration in which the luminance characteristics of each display surface (101, 102) are held by the image generation device 220 is shown. However, among the plurality of display surfaces (101, 102), the image generation device 220 One that has the luminance characteristics of one or more display surfaces, generates a two-dimensional image for the display surface, and the image generation device 220 displays the same two-dimensional image as the input image for the display surfaces that do not have the luminance characteristics It is also good.

[Example 2]
FIG. 12 is a block diagram illustrating the configuration of the pseudo 3D stereoscopic display device according to the second embodiment of the present invention. FIG. 12 illustrates a configuration in the case where there are two display surfaces 101 and 102. In FIG. 12, 14 a and 14 b are three-dimensional stereoscopic images, and 108 is an interval (depth width) between the display surface 101 and the display surface 102.
In the present embodiment, the luminance characteristic of the display surface (101, 102) is changed by hardware by using the luminance characteristic conversion device 301. As the luminance characteristics, the above-described luminance characteristics 1 to 3 can be adopted.
In FIG. 12, the luminance characteristic of the display surface 101 is changed by the luminance characteristic conversion device 301, but the luminance characteristic conversion device may be provided for each display surface (101, 102).
In the above description, the case where there are two display surfaces 101 and 102 has been described. However, as described in Patent Document 1 described above, two or more display surfaces may be used. Needless to say, it is good.
In the above description, the case where a light-emitting transmission type display is used as the two-dimensional display device constituting each display surface has been described. However, as described in Patent Document 2, each display surface is described. It is also possible to use an absorption-type transmissive display as the two-dimensional display device that constitutes. In this case, the luminance characteristic for each display surface described in each of the graphs described above is a transmittance characteristic for each display surface.

However, in the case of transparency, the depth position of the three-dimensional stereoscopic image perceived by the observer is as follows depending on the transparency of the two-dimensional images displayed on the front and rear display surfaces.
For example, when the three-dimensional object 104 is on the display surface 101, the transmittance of the transmissive display device constituting the display surface 101 is set so that the luminance of the 2D image 105 is equal to the luminance of the three-dimensional object 104. For example, the transmittance of the transmissive display device constituting the display surface 102 is set to the maximum value of the transmissive display device.
Next, for example, when the three-dimensional object 104 is slightly away from the observer 100 and is located slightly closer to the transmissive display device constituting the display surface 102 than the transmissive display device constituting the display surface 101. Slightly increases the transmittance of the 2D image 105 on the transmissive display device constituting the display surface 101 and slightly decreases the transparency of the 2D image 106 on the transmissive display device constituting the display surface 102.
Further, for example, when the three-dimensional object 104 is further away from the observer 100 and is closer to the transmissive display device constituting the display surface 102 than the transmissive display device constituting the display surface 101. The transmittance of the 2D image 105 on the transmissive display device constituting the display surface 101 is further increased, and the transmittance of the 2D image 106 on the transmissive display device constituting the display surface 102 is further decreased.
Finally, for example, when the three-dimensional object 104 is on the transmissive display device constituting the display surface 102, the transmittance on the transmissive display device constituting the display surface 102 is represented by the brightness of the 2D image 106. It is set to be equal to the luminance of the three-dimensional object 104, and the transparency of the 2D image 105 on the transmissive display device constituting the display surface 101 is set to the maximum value of the transmissive display device, for example.

As described above, in this embodiment, it is possible to easily display a pseudo three-dimensional stereoscopic image without depth information and without luminance distribution processing for distributing luminance to each display surface. That is, in the three-dimensional display method of the DFD method, the observer 100 feels unevenness due to a difference in luminance value (or transmittance), and therefore, by assigning different luminance characteristics (or transmittance characteristics) to each display surface, The observer 100 has an effect of feeling unevenness due to a difference in luminance (or transmittance) such as a bright region or a dark region.
In the present embodiment, a three-dimensional stereoscopic image reflecting the shape of an object photographed as a two-dimensional image is not displayed. However, in this embodiment, distance information for an image is not necessary, and a pseudo three-dimensional stereoscopic image can be displayed with a small amount of calculation such as simple luminance conversion (or transparency conversion).
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 figure which shows schematic structure of the three-dimensional stereoscopic display apparatus used as the foundation of this invention. FIG. 4 is a diagram for explaining a method of generating a 2D image to be displayed on each display surface in the three-dimensional stereoscopic display device that is the basis of the present invention. It is a figure for demonstrating the display principle of the three-dimensional stereoscopic display apparatus used as the basis of this invention. It is a figure for demonstrating the display principle of the three-dimensional stereoscopic display apparatus used as the basis of this invention. It is a figure for demonstrating the display principle of the three-dimensional stereoscopic display apparatus used as the basis of this invention. It is a figure for demonstrating the display principle of the three-dimensional stereoscopic display apparatus used as the basis of this invention. FIG. 3 is a diagram for explaining a method for generating a two-dimensional image to be displayed on a display surface in the three-dimensional stereoscopic display device that is the basis of the present invention. It is a block diagram which shows the structure of the image generation apparatus used for the pseudo | simulation three-dimensional stereoscopic display apparatus of Example 1 of this invention. It is a figure for demonstrating an example of the brightness | luminance characteristic in the pseudo | simulation three-dimensional stereoscopic display method of the Example of this invention. It is a figure for demonstrating the other example of the brightness | luminance characteristic in the pseudo | simulation three-dimensional three-dimensional display method of the Example of this invention. It is a figure for demonstrating the other example of the brightness | luminance characteristic in the pseudo | simulation three-dimensional three-dimensional display method of the Example of this invention. It is a block diagram which shows schematic structure of the pseudo | simulation three-dimensional stereoscopic display apparatus of Example 2 of this invention.

Explanation of symbols

1, 2, 15, 16 Two-dimensional image 14, 14a, 14b Three-dimensional stereoscopic image 100 Viewer 101, 102 Display surface 103 Optical system 104 Three-dimensional object 105, 106 Two-dimensional image 108 Depth width 111, 112, 221, 222 Luminance characteristic 200 Input image 210, 220 Image generation device 211 RGB image 212 Z image 301 Luminance characteristic conversion device

Claims (10)

A pseudo three-dimensional display method for displaying a two-dimensional image so as to overlap with a plurality of display surfaces at different depth positions as viewed from the observer and displaying a pseudo three-dimensional stereoscopic image. ,
A pseudo three-dimensional display method, wherein one two-dimensional image is displayed on each display surface by using different luminance characteristics or transmittance characteristics for each display surface.   2. The pseudo three-dimensional display method according to claim 1, wherein a γ function having a different γ value is used as the luminance characteristic or transmittance characteristic of each display surface.   Among the two adjacent display surfaces, the γ value of the luminance characteristic of the display surface in front of the observer is larger than the γ value of the luminance characteristic of the display surface in the back as viewed from the observer. The pseudo three-dimensional display method according to claim 2, wherein the pseudo three-dimensional display method is provided.   As the luminance characteristics or transmissivity characteristics of each display surface, the luminance value or transmissivity characteristic of two adjacent display surfaces is represented by using the luminance value of the input image as the horizontal axis and the luminance value or transmissivity displayed on the display surface as the vertical axis. 2. The pseudo three-dimensional display method according to claim 1, wherein luminance characteristics or transmissivity characteristics are used so that two curves obtained intersect each other at a single location.   The luminance characteristics of the two adjacent display surfaces are such that when the luminance value of the input image is small, the luminance value of the display surface in the back as viewed from the observer is in front of the observer When the luminance value of the input image is a large value, the luminance value of the display surface in front of the observer is the luminance value of the display surface behind the observer. The pseudo three-dimensional display method according to claim 4, wherein a larger value is obtained. A plurality of display surfaces arranged at different depth positions as viewed from the observer;
A pseudo three-dimensional display device comprising image generation means for displaying a two-dimensional image so as to overlap the plurality of display surfaces as viewed from the observer,
The pseudo three-dimensional display device, wherein the image generation means displays one two-dimensional image on each display surface using different luminance characteristics or transmittance characteristics for each display surface.   The pseudo three-dimensional display device according to claim 6, wherein the image generation unit uses a γ function having a different γ value as the luminance characteristic or the transmittance characteristic of each display surface.   Among the two adjacent display surfaces, the γ value of the luminance characteristic of the display surface in front of the observer is larger than the γ value of the luminance characteristic of the display surface in the back as viewed from the observer. The pseudo three-dimensional display device according to claim 7, wherein the pseudo three-dimensional display device is provided.   The image generation means is configured such that the luminance value or the transmission characteristic of each display surface has the horizontal value of the luminance value of the input image and the vertical value of the luminance value or transparency displayed on the display surface. 7. The pseudo three-dimensional display according to claim 6, wherein the luminance characteristic or the transmission characteristic is used such that when the luminance characteristic or the transmission characteristic is represented in a graph, two obtained curves intersect at one place. apparatus.   The luminance characteristics of the two adjacent display surfaces are such that when the luminance value of the input image is a small value, the luminance value of the display surface in the back as viewed from the observer is the front of the display surface as viewed from the observer. When the luminance value of the input image is large, the luminance value of the display surface in front of the observer is larger than the luminance value of the display surface behind the observer. The pseudo three-dimensional display device according to claim 9, wherein the pseudo three-dimensional display device is a value.

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