JP2010257224A - Moving image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device that reproduces a video of high quality, rendering images of a three-dimensional model with a low processing load. <P>SOLUTION: A computer 20 performs rendering by mapping an x-coordinate vertical stripe pattern and a y-coordinate horizontal stripe pattern, corresponding to the bit values binary-representing coordinates (x,y) as the textures for a three-dimensional model, and analyzes resultant rendered images, which are bitmap images, to set a correspondence between the coordinates (x,y) of the rendered images and coordinates (Xt(x,y),Yt(x,y)) of the textures. When a video is displayed using the rendered images, a viewer 20 sequentially loads the rendered images in the background to rendering, as well as, rendering the gradation values at the coordinates (Xt(x,y),Yt(x,y)) of textures into the coordinates (x,y) of display images, according to the correspondence set beforehand. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a moving image display apparatus that displays a moving image by drawing an image in units of frames.

  Conventionally, as this kind of moving image display device, a three-dimensional model is rendered in real time and displayed on a display (for example, refer to Patent Document 1), and a bitmap image is created by previously rendering a three-dimensional model. It has been proposed that the display is performed by reading a bitmap image.

Japanese Patent Application Laid-Open No. 07-152925

  In the former method, since it is necessary to perform the rendering process at a cycle shorter than the display cycle of the screen, a high calculation capability is required. Therefore, depending on the computer to be used, there is a shortage in computing ability, and high quality rendering such as ray tracing cannot be performed. On the other hand, since the latter method only displays a bitmap image, it is possible to display a high-quality image by creating a bitmap image by performing high-quality rendering in advance. Then you can't replace it with a different texture later. Also, when a moving image is displayed by drawing a bitmap image in units of frames, frames are dropped unless the image is read and developed earlier than the display cycle.

  The moving image display apparatus according to the present invention has a main object of smoothly displaying a moving image by a high-quality three-dimensional model rendering image with less processing load.

  The moving image display apparatus of the present invention employs the following means in order to achieve the main object described above.

The moving image display device of the present invention includes:
A moving image display device that displays a moving image by drawing an image in frame units,
By storing a rendered pattern obtained as a bitmap image for each frame by pasting a predetermined pattern having different gradation values for each coordinate as a texture on a three-dimensional model and rendering, and analyzing the rendered image Storage means for storing a correspondence relationship between the coordinates of the obtained rendered image and the coordinates of the predetermined pattern;
An image reading unit that sequentially reads up to a predetermined amount of the rendered image of each frame from the storage unit when an instruction to display a moving image is given;
Drawing means for combining and drawing a desired texture in the read rendered image sequentially in units of frames based on the stored correspondence;
It is a summary to provide.

  In the moving image display device of the present invention, when display of a moving image is instructed, each image is stored from a storage unit that stores a rendered image for each frame and a correspondence relationship between coordinates of the rendered image and coordinates of a predetermined pattern. The frame-rendered image is sequentially read up to a predetermined amount, and a desired texture is synthesized and drawn in the rendered image sequentially read in units of frames based on the stored correspondence. Therefore, an image obtained by rendering a three-dimensional model can be displayed with a desired texture replaced, and a processing load can be reduced as compared with a case where a three-dimensional model is rendered in real time and displayed as a moving image. In addition, when the display of the moving image is instructed, the rendered image of each frame stored in the storage unit is sequentially read up to a predetermined amount prior to the timing when the rendered image is required in the processing of the drawing unit. Even with a device having a relatively low processing capability, it is possible to prevent frame dropping more reliably than a device that reads a rendered image of a frame corresponding to each drawing.

  In such a moving image display device of the present invention, the correspondence relationship may be a relationship derived by specifying the corresponding coordinates of the predetermined pattern from the gradation value of each coordinate of the rendered image. it can.

  In the moving image display device of the present invention, the predetermined pattern may be a plurality of patterns corresponding to the number of bits when coordinates are expressed in binary numbers, and a gradation value corresponding to a bit value corresponding to each coordinate. It is also possible to assume that the pattern is set. In this way, the correspondence can be set more accurately. In this case, the binary number may be a gray code (alternate binary number). In this way, since only 1-bit change always occurs when moving to an adjacent coordinate, it is possible to suppress erroneous data from being acquired due to an error in the gradation value of the image.

  Furthermore, in the moving image display device of the present invention, the predetermined pattern includes a first solid pattern that is solid-coated with a minimum gradation value in addition to the correspondence setting pattern for setting the correspondence. The storage means is a means for storing a bias value that is a gradation value of the first solid pattern in the rendered image, and the drawing means is based on the stored bias value. It may be a means for converting and rendering the gradation value of the rendered image by offsetting the gradation value of the desired texture. By doing this, it is possible to reflect the effect of rendering the three-dimensional model that does not depend on the original texture.

  Further, in the moving image display device of the present invention, the predetermined pattern includes a first solid pattern and a maximum pattern that are solidly applied with a minimum gradation value in addition to the correspondence setting pattern for setting the correspondence. A pattern including a second solid pattern that is solid-coated with gradation values, and the storage means stores the gradation value of the second solid pattern and the first solid pattern in the rendered image. Means for storing a gain which is a deviation from a tone value, and the drawing means converts the tone value of the desired texture into a tone value of the rendered image based on the stored gain and draws It can also be a means to do. In this way, it is possible to reflect the effect of the original texture gradation value among the effects of rendering the three-dimensional model. In the moving image display apparatus of the present invention of this aspect, when the predetermined pattern is displayed by arranging a plurality of desired textures on the rendered image by the drawing unit, the predetermined pattern is the number of the desired textures to be arranged. A set group, each set comprising one second solid pattern and the number of the first solid patterns obtained by subtracting the value 1 from the number of textures to be arranged; A first set group in which the location where the second solid pattern is pasted on the dimensional model is different from each other, and a second set including the same number of the first solid patterns as the number of desired textures to be arranged. The pattern is a pattern that is pasted to the 3D model and rendered for each set, and the gain includes the first set group for each set. For each set of the first set group, the gradation value of each rendered image obtained by rendering for each image and the gradation value of the rendered image obtained by rendering the second set By comparing, a texture region that is a region where a texture is pasted on the three-dimensional model is specified, and the texture region can be calculated for the specified texture region. In this way, the texture area can be specified more easily.

The block diagram which shows the outline of a structure of the viewer 20 as one Embodiment of this invention. The block diagram which shows the outline of a structure of the computer 40. FIG. The flowchart which shows an example of a special texture production | generation process. Explanatory drawing which shows an example of a special texture. Explanatory drawing which shows a mode that a special texture is rendered for every set. 7 is a flowchart illustrating an example of image drawing information generation processing. Explanatory drawing explaining bias Bc, t (x, y) and gain Gc, t (x, y). Explanatory drawing which shows an example of the texture for replacement. Explanatory drawing which shows an example of the slide show display of the texture for replacement. It is explanatory drawing explaining the mode of a slide show display process. Explanatory drawing which shows the special texture of a modification. Explanatory drawing which shows a mode that it renders using the special texture of a modification. Explanatory drawing which shows the special texture of a modification.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an outline of the configuration of a viewer 20 as an embodiment of the present invention, and FIG. 2 is a block diagram showing an outline of the configuration of a computer 40 that creates data used for displaying a moving image by the viewer 20. It is.

  The computer 40 creates data necessary for displaying a three-dimensional rendering image as a moving image in units of frames by the viewer 20 of the present embodiment, and as shown in FIG. 2, a CPU as a central processing unit. And a ROM for storing processing programs, a RAM for temporarily storing data, a graphic processor (GPU), a hard disk (HDD), a display unit 21 and the like. Storage unit 41 for storing dimensional modeling data (hereinafter referred to as 3D model) and texture data (hereinafter referred to as texture) to be pasted thereon, and special texture for generating a special texture for preprocessing to be pasted onto the 3D model. Generation processing unit 42 and three-dimensional model Comprises a rendering processor 44 that generates a bitmap image by rendering, a rendered image analysis processing section 46 for analyzing the rendered image as obtained bitmap image by rendering, a.

  The special texture generation processing unit 42 is a processing unit that generates a predetermined pattern of texture to be pasted on the 3D model rendered by the rendering processing unit 44. Specifically, as the predetermined pattern, a value of 0.0 to 1.0 is used. A solid white pattern with a gradation value of 1.0 within a gradation value range, a black solid pattern with a gradation value of 0.0, and a gradation value of 0.0 and 1.0 A vertical striped pattern alternately appearing in the horizontal direction, and a horizontal striped pattern in which tone values of 0.0 and 1.0 appear alternately in the vertical direction are generated. The role of each pattern will be described later.

  The rendering processing unit 44 is a processing unit that functions when software for 3D rendering is installed in the computer 40. By rendering the 3D model by pasting the texture generated by the special texture generation processing unit 42, rendering is performed. A bitmap image is reproduced in units of frames at a predetermined frame rate (for example, 20 times or 30 times per second) to display a moving image. In the present embodiment, the rendering process is performed using a ray tracing method that calculates and renders reflection of an object surface, light refraction, and the like while tracing light from a light source.

  The rendered image analysis processing unit 46 analyzes the bitmap image (rendered image) generated by the rendering processing unit 44, and arranges and renders desired image data such as a photograph instead of a predetermined pattern texture. Image drawing information is generated for displaying the completed image on the viewer 20 side.

  As shown in FIG. 1, the viewer 20 of the present embodiment includes a display unit 21 as a liquid crystal display and a memory card interface (I / F) 22 that controls input of image data such as photographs stored in the memory card MC. A UI input unit 30 for inputting a signal from an operation system operated by a user, a storage unit 32 for storing a rendered image and image drawing information generated by the computer 40, and a rendering stored in the storage unit 32 A load processing unit 34 that loads and expands a completed image and stores it in the data storage area 36 of the RAM, and expands the image data stored in the memory card MC and draws it in the drawing buffer 26 or in the data storage area 36. The image data stored in the memory card MC is added to the stored rendered image. A drawing processing unit 24 for drawing and drawing in the drawing buffer 26; an LCD interface (I / F) 28 for controlling transfer of image data drawn in the drawing buffer 26 to the display unit 21; and controlling the entire apparatus. And a control unit 38. The viewer 20 sequentially reads a plurality of image data stored in the memory card MC according to an instruction from a user, and pastes the read image data on a rendered image of the 3D model using image drawing information in units of frames. By performing sequential reproduction, it can be displayed as a moving image (slide show display).

  Next, operations of the viewer 20 and the computer 40 of the present embodiment configured as described above will be described. First, the operation on the computer 40 side will be described. FIG. 3 is a flowchart illustrating an example of the special texture generation process executed by the special texture generation processing unit 42 of the computer 40.

  In the special texture generation process, first, the target set number i is initialized to a value 1 (step S100), and n special textures are generated for each RGB color component for the target set number i (step S110). The target set number i is incremented by 1 (step S120), the target set number i is compared with the value n (step S130), and when the target set number i is less than or equal to the value n, the process returns to step S110 and the next target The process of generating n special textures for the set number i is repeated. When the target set number i exceeds the value n, the process proceeds to the next process. Here, the generation of the special texture with the target set number i from the value 1 to the value n shifts the target texture number j from the first to the nth by the value 1 from the first as shown in the following equation (1). While comparing the target texture number j and the target set number i, the target texture number j that matches the target texture number j is in the gradation value range from the minimum value 0.0 (black) to the maximum value 1.0 (white). A special white solid texture is generated by setting a gradation value of 1.0 to all coordinates (x, y), and the target texture number j that does not match is set to all coordinates (x, y). This is done by generating a solid black special texture by setting a gradation value of 0.0. Here, “c” in the formula (1) indicates a value corresponding to each color of the RGB values of the image data, “n” indicates the number of textures arranged on one screen, and “b” indicates the texture coordinates. Indicates the number of bits when expressed as a binary number, and “Tc, i, j (x, y)” indicates the coordinates (x, y) of the special texture in the color component c, the target set number i, and the target texture number j. Indicates a gradation value (hereinafter the same).

  When the special texture having the target set number i having the value 1 to the value n is generated, n special textures for each color component having the target set number i having the value (n + 1) are generated (step S140). i is incremented by 1 (step S150). Here, the generation of the special texture having the target set number i of the value (n + 1) is performed with respect to all the target texture numbers j from 1 to n as shown in the following equation (2). This is done by generating a solid black special texture by setting a gradation value of 0.0 to y).

  When the special texture having the target set number i of the value (n + 1) is generated, the {i− (n + 2)] when the texture coordinates are expressed as an alternating binary number (gray code) with respect to the target set number i. N special textures for each color component of the vertical stripe pattern corresponding to the bit are generated by the following equation (3) (step S160), the target set number i is incremented by 1 (step S170), and the target set number i Is compared with the value (n + b + 1) (step S180), and when the target set number i is equal to or smaller than the value (n + b + 1), the process returns to step S160 to generate n special textures for the next target set number i. Repeatedly, when the target set number i exceeds the value (n + b + 1), the process proceeds to the next process. Here, “gray (a)” in Equation (3) is a gray code (alternate binary code) representation of the numerical value a, and “and (a, b)” is the logical product of a and b for each bit. Shown (same below). The target set numbers i from (n + 2) to (n + b + 1) are the 0th bit (most significant bit) to the (b-1) th bit (least significant bit) when the texture coordinates are expressed in binary numbers, respectively. The gradation value of 1.0 (white) is set when the value of the bit corresponding to the target set number i is 1, and the value of the corresponding bit is 0. A special texture having a vertical stripe pattern is generated by setting a gradation value of 0.0 (black). In this embodiment, the texture coordinates are expressed in alternating binary numbers. For example, if the texture number n is 3 and the coordinates are 3 bits (b = 3), the target set number i is the first number. As a special texture with a value of 5 indicating 0 bit (most significant bit), a black gradation value is set for an x coordinate value of 1 to 4, a white gradation value is set for a value of 5 to 8, and a target set is set. As for the special texture having the value 6 in which the number i indicates the first bit, the black coordinate value is set for the x coordinate values 1 and 2, the white tone value is set for the values 3 to 6, and the values 7 and 8 are set. Is a black gradation value, and the target set number i is a special texture with a value 7 indicating the second bit (least significant bit). For 3 the white tone value is set and for values 4 and 5 So that the black gradation value is set for the gradation value set value 8 white for black gradation value set value 6,7.

  When the special texture having the target set number i of the value (n + 2) to the value (n + b + 1) is generated, the {i− (n + b + 2) when the y coordinate of the texture is expressed as an alternating binary number with respect to the target set number i. )] N special textures for each color component of the horizontal stripe pattern corresponding to the bit are generated by the following equation (4) (step S185), the target set number i is incremented by 1 (step S190), and the target set is set. The number i is compared with the value (n + 2b + 1) (step S195). When the target set number i is equal to or smaller than the value (n + 2b + 1), the process returns to step S185 to generate n special textures for the next target set number i. When the process is repeated and the target set number i exceeds the value (n + 2b + 1), the generation of all the special textures is completed. This routine is terminated. The target set numbers i from (n + b + 2) to (n + 2b + 1) are the 0th bit (most significant bit) to the (b-1) th bit (least significant bit) when the texture coordinates are expressed in binary numbers, respectively. The gradation value of 1.0 (white) is set when the value of the bit corresponding to the target set number i is 1, and the value of the corresponding bit is 0. A special texture with a horizontal stripe pattern is generated by setting a gradation value of 0.0 (black). In this embodiment, the texture coordinates are expressed in gray code. For example, if the texture number n is 3 and the y coordinate is 3 bits (b = 3), the target set number i is the first number. As a special texture of value 8 indicating 0 bit (most significant bit), a black gradation value is set for values 1 to 4 and a white gradation value is set for values 5 to 8, and the target set is set. As for the special texture with the number 9 indicating the first bit as the number i, a black gradation value is set for the y coordinate values 1 and 2, and a white gradation value is set for the values 3 to 6, and the values 7 and 8 are used. As for a special texture having a value 10 indicating that the target set number i indicates the second bit (least significant bit), a black gradation value is set for a value 1 and a black gradation value is set. , 3 are set to white gradation values and values 4, 5 For so that black gradation value is set for the gradation value set value 8 white for black gradation value set value 6,7. FIG. 4 shows a list of special textures generated when the number of textures n is 3 and the number of coordinate bits b is 3.

  For each set, the rendering processing unit 44 performs rendering processing by pasting the corresponding n special textures onto the three-dimensional model. FIG. 5 shows the rendering process. In this embodiment, since the three-dimensional model is rendered as a moving image, the number of textures n is 3 and the number of bits b is 3, the rendering process for a total of 10 sets is performed and 10 sets of moving images are generated. Will be. This moving image is composed of bitmap images (rendered images) generated for each frame from frames 1 to T (for example, T is 200).

  Next, processing for analyzing the rendered image generated by the rendering processing unit 44 will be described. FIG. 6 is a flowchart illustrating an example of a rendered image analysis process executed by the rendered image analysis processing unit 46.

  In the rendered image analysis process, first, as shown in the following equation (5), the variable It (x, y) of the coordinates (x, y) of the rendered image at each frame number t (= 1 to T) is set to the value 0. (Step S200), a white solid area (coordinates) in the rendered image of the set numbers 1 to n in the target frame t is specified, and the texture corresponding to the variable It (x, y) of this white solid area A number (= target set number i) is set (step S210). As shown in the following equation (6), this processing is performed by sequentially shifting the target set number i from No. 1 to n, and the gradation value of the rendered image of the target set number i (the gradation value for each color component). This can be done by comparing the sum of the tone values of the rendered image with the set number (n + 1) (the sum of the tone values for each color component). Here, “w” in equation (5) indicates the size in the width direction of the rendered image, and “h” indicates the size in the height direction of the rendered image. In addition, “Ac, i, t (x, y)” in the equation (6) is a rank of the coordinate (x, y) of the rendered image at the color component c, the set number i (1 to n), and the frame number t. Indicates the key value (hereinafter the same).

  Subsequently, the gradation value of the rendered image with the set number (n + 1) is set as the bias Bc, t (x, y) by the following equation (7) (step S220), and the variable It (x, y) is a value. The gain Gc, t (x, y) is calculated by the following equation (8) for the coordinates (x, y) of the rendered image that is not 0, that is, the white solid region (step S230). Here, “Ac, It (x, y), t (x, y)” in the equation (8) is the color component c and the set number i and the frame number t stored in the variable It (x, y). Indicates the gradation value of the coordinates (x, y) of the rendered image. FIG. 7 shows the relationship between the bias Bc, t (x, y) and the gain Gc, t (x, y). When rendering with a texture attached to a 3D model, as shown in the figure, the offset that does not depend on the tone value of the original texture corresponds to the bias Bc, t (x, y), and the tone value of the original texture The gradient of the change in the tone value of the rendered image with respect to the change corresponds to the gain Gc, t (x, y).

  Then, the coordinates (X't (x, y), Y't (x, y)) of the texture gray code expression are initialized to the value 0 by the following equation (9) (step S240), and the set number (n + 2) Correspondences between the coordinates (x, y) of the rendered image (n + 2b + 1) and the coordinates (X′t (x, y), Y′t (x, y)) of the texture are set (step S250). Here, the coordinate correspondence is performed by the following equation (10). Specifically, the gradation value of the rendered image of the set number (i + n + 1) while sequentially shifting the set number i from 1 to n. Ac, i + n + 1, t (x, y) minus bias Bc, t (x, y) (sum of each color component) is the gain Gc, t (x , y) greater than 2 divided by the value 2 (total for each color component), that is, whether the coordinates (x, y) of the white and black vertical stripe patterns in the set number (i + n + 1) are white If it is white, the value (1) is set to the value of the corresponding (i−1) -th bit of the coordinate X′t (x, y) in the alternating binary number expression, and the set number i is set from 1 to n Subtracting the bias Bc, t (x, y) from the gradation value Ac, i + b + n + 1, i (x, y) of the rendered image of the set number (i + b + n + 1) while sequentially shifting (each color Whether or not (sum per minute) is greater than the gain Gc, t (x, y) of the rendered image with set number i divided by the value 2 (sum for each color component), ie at set number (i + b + n + 1) It is determined whether or not the coordinate (x, y) is white in the white and black horizontal stripe pattern, and if it is white, the value of the corresponding (i−1) -th bit of the coordinate Y′t (x, y) is the value. This is done by setting it to 1. Here, “or (a, b)” in the expression (10) indicates a logical sum of bits a and b.

  When the correspondence relationship of coordinates is set, the coordinates (X't (x, y), Y't (x, y)) of the texture of the gray code expression are decoded using the following equation (11) to obtain the decoded coordinates (Xt (x, y), Yt (x, y)) is calculated (step S260), the setting or calculation result so far is stored in the storage unit 32 as image drawing information (step S270), and values 1 to T are calculated. It is determined whether or not the processing has been completed for all the frames up to (step S280), and when the processing has not been completed for all the frames, the next frame is set as the target frame t and the processing returns to step S210 to repeat the processing. This processing ends when the processing is completed for all frames. Here, “gray-1 (a)” in Expression (11) indicates a value obtained by decoding the Gray code a, and “Xt (x, y)” indicates the coordinates (x, y) represents the x coordinate of the texture, and “Yt (x, y)” represents the y coordinate of the texture corresponding to the coordinate (x, y) of the rendered image of frame number t. In this embodiment, since the origin of the coordinates (X′t (x, y), Y′t (x, y)) is (1,1), the value 1 is set to the value obtained by decoding the Gray code. It is adding. Image rendering information includes variable It (x, y), bias Bc, t (x, y), gain Gc, t (x, y), and coordinates (Xt (c, y), Yt (x, y)) And are included.

  Next, the operation of the viewer 20 of this embodiment will be described. In the viewer 20 according to the present embodiment, the storage unit 32 includes a rendered image (bitmap image compressed data) generated by the rendering processing unit 44 of the computer 40 and image rendering information generated by the rendered image analysis processing unit 46. Are read from the storage unit 32, and a plurality of image data such as photographs stored in the memory card MC are read as replacement textures, and the rendered image is obtained using the following equation (12). By combining and sequentially drawing, it is possible to perform a slide show reproduction in which the rendered image of the three-dimensional model is displayed as a moving image while replacing the texture. Here, “Uc, i (x, y)” in the expression (12) is the gradation value (0.0 to 1.0) of the coordinate (x, y) of the replacement texture in the color component c and texture number i. "Pc, t (x, y)" indicates the gradation value (0.0 to 1.0) of the coordinates (x, y) of the display image (rendered image) in the color component c and frame number t. Indicates. As shown in the equation (12), the gradation value Pc, t (x, y) of the display image is set with respect to the texture arrangement region where the variable It (x, y) is not 0 (the coordinate of the display image ( Bias Bc, t (x) by multiplying the tone value of the replacement texture coordinates (Xt (x, y), Yt (x, y)) corresponding to x, y) by the gain Gc, t (x, y) , y) is set, and a bias Bc, t (x, y) is set for a region other than the texture placement region in which the variable It (x, y) is 0. FIG. 8 shows three replacement textures having texture numbers 1 to 3, and FIG. 9 shows a state in which the replacement texture of FIG.

  FIG. 10 is an explanatory diagram illustrating an example of display processing. When the user instructs the slide show display via the UI input unit 30, the control unit 38 outputs a load start request to the load processing unit 34 via the drawing processing unit 24, and the load process that has received the load start request The unit 34 sequentially loads and expands the rendered images of each frame constituting the moving image and stores them in the data storage area 36. In the present embodiment, the area is secured so that the rendered image of about 20 to 30 frames can be stored in the data storage area 36 for 200 frames constituting the moving image. The drawing processing unit 24 obtains a rendered image for each frame stored in the data storage area 36 in units of frames in accordance with the display cycle, and draws it on the drawing buffer 26 by combining with the texture by the above-described processing. Is displayed as a video. Since the load processing unit 34 loads as much as possible in the background in the data storage area 36 even during the drawing processing by the drawing processing unit 24, the frame is dropped because drawing is not in time for the display cycle of the display unit 21. Can be suppressed.

  According to the moving image display apparatus of the embodiment described above, on the computer 40 side, the vertical stripe pattern pattern and the y coordinate for x coordinate corresponding to the value of each bit when the coordinates (x, y) are expressed in binary numbers. The horizontal stripe pattern for the image is pasted and rendered as a texture on the 3D model, and the rendered image obtained as a bitmap image by rendering is analyzed, and the coordinates (x, y) of the rendered image and the texture Correspondences with coordinates (Xt (x, y), Yt (x, y)) are set and stored as image drawing information. When an image is displayed using the rendered image on the viewer 20 side, it is stored in advance. Rendered image of 3D model because it draws to display image coordinate (x, y) based on texture coordinate (Xt (x, y), Yt (x, y)) gradation value by image drawing information The tech It is possible to freely replace and reproduce the steamer, and to reduce the processing burden as compared with the case where the three-dimensional model is rendered and displayed in real time. At this time, the rendered image of each frame is sequentially loaded in the background even while the drawing processing unit 24 is performing the drawing process, so that a frame drop occurs because drawing is not in time for the display cycle of the display unit 21. Can be suppressed. Also, since the tone value of the texture is converted using the gain Gc, t (x, y) and the bias Bc, t (x, y) to set the tone value of the display image, the three-dimensional model is rendered. It is also possible to reflect the effects of refracted light, specular reflection, and shadows. Furthermore, since a vertical striped pattern and a horizontal striped pattern corresponding to alternating binary numbers are formed as a special texture for specifying the correspondence of coordinates, a change of 1 bit always occurs when moving to adjacent coordinates. Therefore, it is possible to suppress erroneous data from being acquired due to an error in the gradation value of the image.

  In the present embodiment, a three-dimensional pattern is obtained by using a vertical stripe pattern for x coordinates and a horizontal stripe pattern for y coordinates corresponding to the value of each bit when coordinates (x, y) are expressed in binary notation as a texture. Image rendering information is generated by pasting and rendering the model and analyzing the rendering result. However, the pattern used is not limited to this, and the gradation (gradation value) gradually increases in the x-coordinate direction (lateral direction). It is also possible to use a pattern that changes to a pattern and a pattern in which shading gradually changes in the y-coordinate direction (vertical direction). In this case, a single pattern of the set number (n + 2) obtained by the following equation (13) is used instead of the vertical stripe pattern of the set numbers (n + 2) to (n + b + 1) obtained by the equation (3) described above and the equation Instead of the horizontal stripe pattern of the set numbers (n + b + 2) to (n + 2b + 1) obtained by (4), one pattern of the set number (n + 3) obtained by the following equation (13) may be used.

  When the pattern of Expression (12) and the pattern of Expression (13) are used, the setting of the coordinate correspondence can be obtained by the following Expression (15). FIG. 9 shows an example of the special texture, and FIG. 10 shows a state in which the special texture of FIG. 9 is pasted on the three-dimensional model and rendered. Thereby, the number of special textures to be generated can be reduced.

  In the present embodiment, the special texture of the vertical stripe pattern whose target set number i is a value (n + 2) to a value (n + b + 1) corresponds to the value of each bit when the coordinates are expressed in alternating binary numbers, and the target set number The special texture of the horizontal stripe pattern with i being the value (n + b + 2) to the value (n + 2b + 1) is assumed to correspond to the value of each bit when the coordinates are expressed in an alternating binary number. It may be generated as a value corresponding to the value of each bit when expressed in decimal. An example of the special texture in this case is shown in FIG.

  In the present embodiment, an image is reproduced by the viewer 20, but any device such as a mobile phone with a liquid crystal screen or a printer may be used as long as the device can reproduce an image.

  It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be implemented in various modes as long as it belongs to the technical scope of the present invention.

  20 viewer, 21 display unit, 22 memory card interface (I / F), 24 drawing processing unit, 26 drawing buffer, 28 LCD interface (I / F), 30 UI input unit, 32 storage unit, 34 load processing unit, 36 Data storage area, 38 control unit, 40 computer, 41 storage unit, 42 special texture generation processing unit, 44 rendering processing unit, 46 rendered image analysis processing unit, MC memory card.

Claims (7)

A moving image display device that displays a moving image by drawing an image in frame units,
By storing a rendered pattern obtained as a bitmap image for each frame by pasting a predetermined pattern having different gradation values for each coordinate as a texture on a three-dimensional model and rendering, and analyzing the rendered image Storage means for storing a correspondence relationship between the coordinates of the obtained rendered image and the coordinates of the predetermined pattern;
An image reading unit that sequentially reads up to a predetermined amount of the rendered image of each frame from the storage unit when an instruction to display a moving image is given;
Drawing means for combining and drawing a desired texture in the read rendered image sequentially in units of frames based on the stored correspondence;
A moving image display apparatus comprising:   The moving image display apparatus according to claim 1, wherein the correspondence relationship is a relationship derived by specifying coordinates of the predetermined pattern corresponding to a gradation value of each coordinate of the rendered image.   The predetermined pattern is a pattern in which gradation values corresponding to bit values corresponding to respective coordinates are set in a plurality of patterns corresponding to the number of bits when coordinates are expressed in binary numbers. Or the moving image display apparatus of 2.   4. The moving image display apparatus according to claim 3, wherein the binary number is a gray code (alternate binary number). The moving image display device according to any one of claims 1 to 4,
The predetermined pattern is a pattern including a first solid pattern that is solid-coated with a minimum gradation value in addition to the correspondence setting pattern for setting the correspondence.
The storage means is means for storing a bias value that is a gradation value of the first solid pattern in the rendered image.
The moving image display device, wherein the drawing means is a means for drawing after converting the gradation value of the desired texture by offsetting the gradation value of the desired texture based on the stored bias value. The moving image display device according to any one of claims 1 to 5,
In addition to the correspondence setting pattern for setting the correspondence, the predetermined pattern further includes a first solid pattern that is solid with the minimum gradation value and a second solid pattern that is solid with the maximum gradation value. A pattern including a solid pattern,
The storage means is means for storing a gain which is a deviation between a gradation value of the second solid pattern and the gradation value of the first solid pattern in the rendered image;
The drawing means is means for converting and rendering the gradation value of the desired texture into the gradation value of the rendered image based on the stored gain. The moving image display device according to claim 6,
In the case where a plurality of desired textures are arranged and displayed on the rendered image by the drawing unit, the predetermined pattern is a set group provided by the number of the desired textures to be arranged. Two second solid paint patterns and the number of first solid paint patterns obtained by subtracting 1 from the number of textures to be arranged, and the second solid paint pattern is pasted to the three-dimensional model for each set. A first set group having different locations and one second set including the same number of the first solid coating patterns as the number of desired textures to be arranged are pasted to the three-dimensional model for each set. The pattern to be rendered,
The gain includes a gradation value of each rendered image obtained by rendering the first set group for each set and a gradation value of a rendered image obtained by rendering the second set. Is determined for each set of the first set group to identify a texture region, which is a region where a texture is pasted on the three-dimensional model, and is calculated for the identified texture region Display device.