JP4477257B2 - Supply video generation method for 3D video display device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a supply image generation method used for a three-dimensional image display apparatus using a so-called light beam reproduction method.
[0002]
[Prior art]
Conventionally, a parallax barrier method, a lenticular lens method, and the like are known as methods for realizing stereoscopic image display without requiring special glasses, but these methods are for the right eye having binocular parallax. The video and the left-eye video are alternately displayed in a strip shape on the display screen, and although there is a left-right stereoscopic effect, there is a complaint that a vertical stereoscopic effect cannot be obtained. Further, if the viewing position deviates from the proper viewing position, a phenomenon such as reverse viewing in which the left eye image enters the right eye and the right eye image enters the left eye may occur, and the viewing position cannot be freely selected.
[0003]
On the other hand, in recent years, a three-dimensional video display method called a light beam reproduction method capable of freely selecting a viewing position has been proposed. This light beam reproduction method can be said to be a method for recording / reproducing information on the light ray passing through the plane (that is, the direction of the light ray corresponding to the scattered light from the object and the spread of the light ray) on the plane. For example, as shown in FIG. 4A, the backlight 51, the pinhole array plate 52, and the liquid crystal display panel 53 can be used. Here, it can be considered that light is emitted from each pinhole 52a of the pinhole array plate 52 in several directions within a predetermined range. In the liquid crystal display panel 53, a pixel region (for example, composed of 9 to 20 pixels in the horizontal direction and 3 to 20 pixels in the vertical direction) 53a is formed corresponding to each pinhole 52a. Each pixel in the pixel region 53a controls the amount of light transmitted with respect to the light beam in each direction from the corresponding pinhole 52a, thereby reproducing the intensity of the light beam in each direction. Light More specifically, as shown in FIG. 4 (b), for example, the pixels a ₁ pixel region 53a ₁ which will receive a light beam from the pinhole 52a _1, representing the position X ₁ of an object X A transmission amount is set, and a light transmission amount representing the location X _{2 of the} object X is set in the pixel a ₂ of the pixel region 53a ₂ that receives light from the pin hole 52a _2, and the light transmission amount from the pin hole 52a ₃ is set. Corresponding to a predetermined point of the object X, such that a light transmission amount expressing the position X _{3 of the} object X is set in the pixel a ₃ of the pixel region 53a ₃ that receives the light beam of By reproducing the light transmission amount in the pixel, the observer Z recognizes the object X three-dimensionally. Further, if the observer Z moves downward, the observer Z recognizes as if he / she saw around the object X.
[0004]
[Problems to be solved by the invention]
By the way, a computer (computer graphic technology) is used for a video generation system for generating video data to be given to such a light reproduction type three-dimensional video display device. In other words, a polygon object and a plurality of pinholes are virtually arranged on a computer, and each recording pixel area on a virtually provided recording surface located on a line connecting each point constituting the polygon object and the pinhole Is configured to calculate data for each recording pixel (data for setting the light transmission amount of the video display panel in the video display system).
[0005]
Specifically, as shown in FIG. 5, the point Xa constituting the object X passes through the virtually provided pinhole 60 and records in the recording pixel area 61 on the virtually provided recording surface. Since it is reproduced by the light ray A reaching the pixel a, a calculation process is performed so that the recording pixel a has data representing the point Xa. That is, the collision determination between each light ray and each polygon constituting the object X is performed, and the polygon pixel at the collision point is processed as data on the recording surface through which the light ray passes. Similarly, calculation processing is performed for the recording pixels b to i corresponding to the light beams B to I. The positional relationship between the pinhole 60 and the recording pixel region 61 in the video generation system is set corresponding to the positional relationship between each pinhole 52a and the pixel region 53a in the video display system. Here, for example, the ray A passes through (collides with) the polygon on the back surface side and the polygon on the front surface side among the polygons constituting the object X, so that two recorded pixel data are obtained. Based on the Z coordinate values of these two polygons, it is determined which polygon is closer to the observer, and a process of adopting the recording pixel data closer to the observer is performed.
[0006]
In such a three-dimensional image display device of the ray reproduction method, although the observer Z can recognize the image three-dimensionally according to the principle described above, the amount of calculation for creating the display image becomes enormous, The display image could not be created at high speed.
[0007]
In view of the above circumstances, an object of the present invention is to provide a method for generating a supply video to a 3D video display device that can create a display video to the 3D video display device at high speed.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problem, the supply image generation method for the 3D image display apparatus according to the present invention is configured so that the point-like light emitting portions that give the light beams corresponding to the scattered light from the object are planar at predetermined intervals. A light source device arranged, a video display panel arranged on the light emission side of the light source device, and a display panel drive for setting a display video to be displayed in each pixel area of the video display panel corresponding to each light emission unit A display image to be provided to the video display panel of a 3D video display device comprising: means for displaying the object, the pointed light emitting portion, and the arrangement of the video display panel Corresponding to the polygonal assembly, a plurality of pinholes, and a recording surface are virtually arranged on a computer, and pixel information of the intersection of each light ray and the polygonal assembly is obtained by the light ray. Through While the calculation process is performed on the recording surface to be recorded on the recording surface, the angle formed by the normal line of the polygons constituting the polygon aggregate and the light beam having the maximum width of the light beam spread is 90 from the observer side. A process of excluding polygons exceeding the degree from the calculation process target is performed.
[0009]
Conventionally, when a light ray collides with a polygon on the back side and a polygon on the front side among the polygons constituting one object, two recorded pixel data are obtained, and one of them is adopted. Although processing has been performed, in the method of the present invention, polygons that are outside the observable range are excluded from calculation processing in advance, so that two recorded pixel data are not obtained. That is, since there is no useless calculation processing for obtaining recording pixel data that is not employed, the calculation processing for generating the video is accelerated, and a display video on the 3D video display device is created at high speed.
[0010]
In addition, in the method of generating a supply image to the 3D image display device, an image display panel for displaying an image and a point light transmitting portion to which image light from the image display panel is incident are arranged in a plane at a predetermined interval. And a display panel drive for setting a display image to be displayed in each pixel area of the video display panel corresponding to each point light transmission unit. Means for generating a display image to be provided to the image display panel of a three-dimensional image display device comprising: the object to be displayed; the point light transmission portions arranged in a plane at the predetermined interval; In correspondence with the arrangement relationship of the video display panel, a polygon aggregate serving as the object, a plurality of pinholes, and a recording surface are virtually arranged on a computer, and each ray and the polygon aggregate are While calculating the pixel information of the point portion as a recording pixel on the recording surface through which the light beam passes, among the polygons constituting the polygon aggregate, the normal line and the light beam with the maximum width of the light beam spread. A process of excluding a polygon whose angle formed by the observer exceeds 90 degrees as viewed from the observer side is excluded from the calculation processing target.
[0011]
Even in the above configuration, polygons that are outside the observable range are not subject to calculation processing in advance, so that unnecessary calculation processing for obtaining recording pixel data that is not employed is eliminated, and the calculation processing for image generation is accelerated. Thus, a display image on the 3D image display device is created at high speed.
[0012]
After the exclusion calculation process is performed on all the polygons, the calculation process for generating the recording pixel may be performed on the remaining polygons after the exclusion. Further, the exclusion calculation process for polygons may be sequentially performed before the recording pixel generation for each polygon.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a method for generating a supplied image to a 3D image display apparatus according to an embodiment of the present invention will be described with reference to FIGS.
[0014]
FIG. 1A is an explanatory diagram showing the concept of a video generation system, and FIG. 1B is an explanatory diagram showing a 3D video display device which is a video display system.
[0015]
In the video generation system, an object Y (polygon object) to be displayed, a plurality of pinholes 11 and a recording surface 12 are displayed on the object to be displayed on the video display system, a plurality of pinhole array plates 1. Corresponding to the positional relationship between the pinhole 1a and the liquid crystal display panel 2, they are virtually arranged on the computer. If the pixel area 3 set corresponding to each pinhole 1a is composed of a total of 81 pixels 3a of 9 horizontal and 9 vertical, each pinhole is also formed on the recording surface 12 of the video generation system. The recording pixel area 13 corresponding to 11 is composed of a total of 81 recording pixels 13a of 9 horizontal and 9 vertical.
[0016]
In the video generation system, the object Y, the pinhole 11 and the recording surface 12 are virtually set as described above, and then the recording is located on the line connecting the points constituting the object Y and the pinhole 11. Calculation processing for data generation is performed for each recording pixel 13a in each recording pixel region 13 on the surface 12. In the example shown in the figure, the point Y _{1 of the} object Y passes through the pinhole 11A and reaches the pixel 13a ₁ of the recording pixel region 13A. Therefore, the point Y _{1 of the} object Y is expressed in the recording pixel 13a _1. Data (data that sets the light transmission amount of the video display panel in the video display system) is obtained by calculation processing. By performing the same calculation process for each point of the object Y, data of all the recording pixels 13a is obtained, and a voltage value based on this data is applied to each pixel 3a of the liquid crystal display panel 2 of the 3D video display device. By giving, the light transmission amount of each pixel 3a is set, and the observer Z recognizes the object Y three-dimensionally.
[0017]
FIG. 2 shows the concept of the video generation system of FIG. 1A in a form corresponding to FIG. 5 used in the description of the conventional section. The point Ya constituting the object Y is reproduced by the light ray A that passes through the virtually provided pinhole 11 and reaches the recording pixel 13a (a) of the recording pixel region 13 on the virtually provided recording surface. Therefore, the calculation process is performed so that the recording pixel 13a (a) has data representing the point Ya. That is, the collision determination between each light ray and each polygon constituting the object Y is performed, and the polygon pixel at the collision point is processed as data on the recording surface through which the light ray passes. Similarly, calculation processing is performed for the recording pixels 13a (b to i) corresponding to the light beams B to I.
[0018]
Here, the observable range (object Y) is within the range of light rays (see the light rays J ₁ , J ₂ , J ₃ , and J _{4 in} FIG. 1A) connecting the pinholes 11 and the outermost edges of the recording pixel region 13. Can be seen by wrapping around. In this observable range, there are polygons constituting the object Y that are visible to the observer and those that are not visible to the observer. Specifically, as shown in FIG. 2, for polygons whose polygon normal exceeds 90 degrees with respect to light rays (A, I in the vertical direction) passing from each pinhole 11 to the outermost edge of the recording pixel region 13, Even if the observer shifts the head position up and down, it will not be visible. The angle θ shown in FIG. 2 indicates that a polygon having a normal in the range of the angle in the vertical direction is not observed. The angle range is determined in the same way in the left-right direction. Focusing on this point, prior to collision determination between each ray and each polygon constituting the object Y, a polygon having a normal in the range of the angle θ is selected and excluded from the collision determination target. That is, among the polygons constituting the polygon aggregate, polygons in which the angle between the normal line and the light beam having the maximum width of the light beam spread exceeds 90 degrees as viewed from the observer side are excluded from calculation processing. Perform the process.
[0019]
FIG. 3 is a flowchart showing the above exclusion process. First, a normal region (corresponding to the above θ) as a deletion range is set (step S1). Next, the normal direction of the polygon is determined (step S2), and it is determined whether the normal direction is within the deletion range (step S3). If it is within the deletion range, the polygon is deleted from the object data (step S4), and the process proceeds to step S5. On the other hand, if it is outside the deletion range, the process directly proceeds to step S5. In step S5, it is determined whether or not all polygons have been completed. If NO, the process proceeds to step S2. On the other hand, if the deletion determination process for all polygons is completed, the process proceeds to the Z value search process. The Z value search process is a process of searching for Z of each polygon and performing collision determination to determine a polygon close to the observer.
[0020]
Note that the processing shown in the flowchart of FIG. 3 is performed on the remaining polygons after the exclusion processing is performed on the remaining polygons after the exclusion processing on the polygons is performed. However, the present invention is not limited to this. When performing collision determination to determine a polygon close to the observer, it is determined whether or not the polygon is in the deletion range, and if it is not in the deletion range, the process proceeds to collision determination. Alternatively, a method may be employed in which polygon data close to the next observation is read out, and similarly, it is determined whether or not the polygon is in the deletion range before the collision determination.
[0021]
In the above embodiment, the method for generating the display image corresponding to the light reproduction type 3D image display device in which the image display panel is arranged in front of the point light source has been described. A display image can be generated by a similar method for a light-reproducing three-dimensional image display device in which a hole array plate or the like is arranged.
[0022]
That is, an image display panel for displaying an image and a point-like light transmitting portion on which image light from the image display panel is incident are arranged in a plane at a predetermined interval to give a light beam group corresponding to scattered light from an object. A three-dimensional video display device comprising: a point light transmission part forming panel; and display panel driving means for setting a display video to be displayed in each pixel region of the video display panel corresponding to each point light transmission part. In the method of generating a display image to be given to the image display panel, in correspondence with the arrangement relationship between the object to be displayed, the point light transmission portions arranged in a plane at the predetermined interval, and the image display panel, The polygon aggregate, the plurality of pinholes, and the recording surface that are the objects are virtually arranged on a computer, and the light beam passes through pixel information at the intersection of each ray and the polygon aggregate. While performing the calculation process for recording pixels on the surface, among the polygons constituting the polygon aggregate, for the polygons whose angle between the normal line and the light beam with the maximum width of light spread exceeds 90 degrees, You may make it perform the process excluded from the object of a calculation process. This corresponds to generating video data by composing on the computer the pinhole 11 arranged on the right side of the recording surface 12 in FIG.
[0023]
【The invention's effect】
As described above, in the present invention, polygons that are out of the observable range are excluded from calculation processing in advance, and useless calculation processing for obtaining recording pixel data that is not employed is eliminated, so that calculation for image generation is not performed. The processing speeds up and the display image on the 3D image display device can be created at high speed.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of the present invention, in which FIG. 1 (a) is an explanatory diagram showing a concept of a video generation system for generating video to be supplied to a 3D video display device. b) is an explanatory view showing a 3D video display device.
FIG. 2 is an explanatory diagram showing a concept of a video generation system according to an embodiment of the present invention.
FIG. 3 is a flowchart showing processing of the embodiment of the present invention.
FIG. 4 is a cross-sectional view showing an example of a three-dimensional image display device, and FIG.
FIG. 5 is an explanatory diagram showing a conventional method for generating a supplied video to a 3D video display device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pinhole array board 1a Pinhole 2 Liquid crystal display panel 3 Pixel area 3a Pixel 11 Pinhole 12 Recording surface 13 Recording pixel area 13a Recording pixel

Claims (4)

A light source device in which point-like light emitting portions that give a group of rays corresponding to scattered light from an object are arranged in a plane at predetermined intervals, a video display panel arranged on the light emitting side of the light source device, and A display panel driving means for setting a display image to be displayed in each pixel region of the image display panel corresponding to the light emitting unit, and a method for generating a display image to be provided to the image display panel of the 3D image display device In
The polygon aggregate, the plurality of pinholes, and the recording surface that are the object are virtually displayed on the computer in correspondence with the arrangement relationship of the object to be displayed, the point-like light emitting unit, and the video display panel. And calculating the pixel information at the intersection of each light ray and the polygon aggregate as a recording pixel on the recording surface through which the light ray passes, while out of the polygons constituting the polygon aggregate In addition, a 3D image is characterized in that a polygon in which the angle between the normal line and the light beam having the maximum width of the light beam spread exceeds 90 degrees as viewed from the observer side is excluded from the calculation processing target. Supply video generation method for display device. An image display panel for displaying an image and a point-like light transmitting portion on which image light from the image display panel is incident are arranged in a plane at a predetermined interval to give a light beam corresponding to scattered light from an object The video of a 3D video display device comprising: a light transmission part forming panel; and display panel driving means for setting a display video to be displayed in each pixel region of the video display panel corresponding to each point light transmission part In a method for generating a display image to be given to a display panel,
Corresponding to the positional relationship of the object to be displayed, the point-like light transmission portions arranged in a plane at the predetermined intervals, and the video display panel, a polygon aggregate, a plurality of pinholes as the object, and While the recording surface is virtually arranged on a computer, calculation processing is performed in which pixel information at the intersection of each light ray and the polygon aggregate is used as a recording pixel on the recording surface through which the light ray passes. Of the polygons constituting the body, a polygon whose angle between the normal line and the light beam having the maximum width of the light beam spread exceeds 90 degrees as viewed from the viewer side is excluded from the calculation processing target. A method of generating a supply image to a 3D image display device. 3. The method of generating a supply image to the 3D image display device according to claim 1 or 2, wherein after performing the exclusion calculation process for all the polygons, the remaining polygons after the calculation process for generating a recording pixel is excluded. A method for generating a supplied video to a 3D video display device, characterized in that 3. The method of generating a supply image to a 3D image display apparatus according to claim 1 or 2, wherein the exclusion calculation process for polygons is sequentially performed at a stage prior to recording pixel generation for each polygon. Supply video generation method for display device.

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