JPH0546775A - Method and device for processing image - Google Patents

Abstract

PURPOSE:To coordinate a texture with an optimum resolution with a three- dimensional (3-D) shape by forming the texture with an optional size based upon a vector value function. CONSTITUTION:A 3-D image input means 121 reads out the specification of 3-D scene to be formed from a 3-D scene data base 11. A 3-D image forming processor 123 finds out the projection image of a subject in accordance with the specified contents of the 3-D scene interpreted by a 3-D scene interpreting device 122 and decides the resolution of the texture in accordance with the size of the projection image. A two-dimensional (2-D) image forming device 124 reads out a vector value function for regulating a texture pattern from a character font data base 15 and forms a texture with the decided resolution. The processor 123 finds out the photographed image of the subject obtained by coordinating the formed texture on the subject. A 3-D image output device 125 displays the obtained 3-D image on a display 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image generating apparatus for generating an image of a three-dimensional shape, and more particularly to a texture mapping technique for giving a pattern to the three-dimensional shape for generating an image.

[0002]

2. Description of the Related Art When an image of a three-dimensional shape is generated, an image having a pattern on the surface of the three-dimensional shape may be generated in order to realistically represent the three-dimensional shape.

Generally, in the process of applying a pattern to a surface of a three-dimensional shape, a pattern expressed as a two-dimensional image (hereinafter referred to as "texture") is coded on the surface of the three-dimensional shape. , A texture mapping method is used.

As such a texture mapping technique, Toshiaki Kato, "Various expression methods used for CG image production-focusing on mapping", Pixel, Item 51 to Item 58, and Lance Williams , SIGGRAPH83 Proceedings, Volume 17, Number 3, July 1983 (Lance William
s, 'Pyramidal Parametrics', SIGGRAPH83 Proceedings,
The technology described in Vol.17, No.3, July 1983) is known.

Further, according to the conventional texture mapping technique, in order to repeatedly use an image once generated, an image previously created by computer graphics, a photograph or the like is read by an optical device. An image is stored and this image is used as a pattern. Further, by using the image created in advance for the pattern in this way, it is possible to quickly generate an image of a three-dimensional shape.

[0006] As a technique for giving a pattern to the surface of a three-dimensional shape, Darwin Earl Peachy, SIGG
RAPH85 Proceedings, Volume 19, Number 3, July 1985 (Darwyn R. Peachey, 'Soli
d Texturing of Complex Surface ', SIGGRAPH85 Procee
dings, Vol.19, No.3, July, 1985) is known, and the technique of functional mapping is known.

[0007]

According to the above-mentioned conventional texture mapping technique, since an image created in advance is used as a texture, if the pattern given to the three-dimensional shape is enlarged, the image quality of the displayed pattern becomes rough. There was such a problem.

That is, since the resolution of the image created in advance is constant, when the pattern is made large, shading and the like occur, the image quality becomes rough, and the outline and the like are not smooth. On the other hand, if smoothing filtering or the like is performed in order to smooth the contour line, the image quality will be blurred.

This problem can be avoided by increasing the resolution of the image created in advance to match the largest pattern that may be used. However, when the resolution is increased, the amount of image data increases, which is a problem.

Further, according to the conventional texture mapping technique, image data created in advance as a pattern is used. However, in general, an image has a large amount of data, and if an attempt is made to use many types of patterns, the image data The problem arises that a huge amount of memory is required for the memory.

According to the above-mentioned functional mapping technique, it is extremely difficult to represent irregular patterns such as characters and various types of patterns.

Therefore, the present invention provides an image processing method capable of providing a high-quality, multi-type pattern of any size to a three-dimensional shape of an image generation target based on a small amount of data. The purpose is to

[0013]

[Means for Solving the Problems] To achieve the above object,
The present invention is an image processing method for generating a photographed image of a subject having a three-dimensional shape, which is supposed to be photographed by an assumed camera screen. The resolution of the texture is determined according to the physical positional relationship, the texture having the determined resolution is generated from the texture pattern defined as a vector-valued function on the two-dimensional plane, and the texture is photographed by the camera screen. The present invention provides an image processing method, characterized in that a photographed image of the subject is generated by coordinating the generated texture.

Here, "coordinating" means that a two-dimensional image is attached to the surface of a three-dimensional shape.

Further, in particular, as a preferred embodiment of the image processing method according to the present invention, in the image processing method according to the present invention, the determination of the resolution of the texture is performed by the relative relationship between the assumed camera screen and the object. The projected image of the subject on the assumed camera screen is calculated according to the desired positional relationship, the size of the calculated projected image of the subject is calculated, the resolution of the calculated projected image is calculated, and the calculated projected image is calculated. An image processing method is performed by determining a resolution equivalent to the resolution of the texture as the texture resolution.

[0016]

According to the image processing method of the present invention, a texture is generated from a texture pattern defined as a vector-valued function on a two-dimensional plane. The vector-valued function can represent the shape with a smaller data amount than the image data represented by the pixel data. Therefore, many kinds of textures can be stored and used. Further, since the shape is defined by the vector, it is possible to deal with an image having an arbitrary resolution without causing shading due to the size of the shape to deteriorate the image quality.

Further, the resolution of the texture is determined according to the relative positional relationship between the assumed camera screen and the subject, and is determined from the texture pattern defined as a vector-valued function on the two-dimensional plane. Since the texture having the resolution is generated, the high quality texture can be coordinated to the subject.

Further, in particular, the resolution of the texture is determined by obtaining a projected image of the object on the assumed camera screen according to the relative positional relationship between the assumed camera screen and the object. If the size of the obtained projection image of the subject is calculated, the resolution of the calculated projection image is obtained, and the resolution equivalent to the resolution of the obtained projection image is determined as the texture resolution, the texture resolution will be excessive or insufficient. Since it can be determined without any processing, it is possible to prevent the occurrence of excessive data and eliminate the occurrence of processing that is originally unnecessary.

[0019]

EXAMPLE A first example of the present invention will be described below.

First, the configuration of the image processing apparatus according to the first embodiment is shown in FIG.

As shown in the figure, the image processing apparatus according to the first embodiment has a three-dimensional scene data base 11, a three-dimensional image generation device 12, an image data base 13 and a display 14. There is.

The three-dimensional image generating device 12 is a three-dimensional scene input device 121, a three-dimensional scene interpreting device 122, a three-dimensional image generating processor 123, and a two-dimensional image generating device 12.
It has a 4- and 3-dimensional image output device 125.

The three-dimensional scene database 11 is a database that stores various parameters relating to the three-dimensional scene generated by the image processing apparatus.

First, the three-dimensional scene data base 11 will be described.

Among the data stored in the three-dimensional scene database 11, the data for generating one three-dimensional scene is shown in Table 1. Further, FIG. 3 specifically shows a three-dimensional scene represented by the data shown in Table 1.

[0026]

[Table 1]

The data shown in Table 1 comprises a command for defining a camera for photographing a three-dimensional scene, a command for defining the shape of a subject, and a command for defining attributes of the subject.
By these, the three-dimensional scene is specified by specifying the subject, the light source that illuminates the subject, and the camera that captures the subject.

As shown in FIG. 3, the object 111 designated by the data shown in Table 1 is a sphere having a radius of 1 with (0, 1, 0) as the center, and the characters "aiueo" are not arranged. It has a pattern. In addition, the light source 112 is (5,
It is a point light source that exists at coordinates 5, 5) and has a radiation intensity of 1 and a color of (1, 1, 1). The camera 113 exists at coordinates (0, 5, 0), and faces the negative direction of the y-axis, and images the subject 111. Hereinafter, the space shown in FIG. 3 is called the world space.

The image processing apparatus generates the image of the subject photographed by the camera in the virtual world space as described above. In the present embodiment, however, the image processing apparatus is independent of the world space for the generation processing of the image. The three spaces, that is, the camera space, the subject space, and the texture space are set.

The relationship between these spaces is shown in FIG.

The space defined by the coordinate system indicated by A in the figure is the camera space, and in the illustrated example, the screen of the camera is set on the plane of ZA = 0. Further, it is assumed that the points on the screen on which the respective points in the camera space are projected are known.

Further, the space defined by the coordinate meter shown by B in the figure is the subject space, and in the illustrated example, the center of the sphere which is the subject and the origin of the subject space are made coincident.

The space defined by the coordinate system shown by C in the figure is a texture space, and in the illustrated example, the texture is set on the plane of ZC = 0. Further, it is assumed that the points on the texture that are mapped to the respective points in the texture space when they are the object of mapping are known.

The space defined by the coordinate system indicated by W in the figure is the world space.

The data shown in Table 1 is described in a language called Postscript. Postscript is written in reverse Polish notation.
That is, the statement including the command is described in the order of the parameter and the command using the parameter. For example, in the statement 1105 shown in Table 1, "001" described first is a parameter indicating blue, and "color" is a command for setting the color displayed by the parameter to blue indicated by the parameter.

The data shown in Table 1 will be described in the order described.

HRBegin of statement 1101
Declares the start of image generation. Statement 110
2 / emboss is the name of the "procedure" that creates the pattern.

The procedure between "{" and "}" following / emboss, that is, between statements 1102 to 1108, is a procedure for generating a subject pattern.

Statement 1103 is a parameter that characterizes the pattern. Statements 1104 to 1
Reference numeral 107 is a statement for generating a pattern.

Reference numeral 1104 denotes a statement in which the type of characters to be displayed is Gothic and the size of the characters is 0.02. Statement 1105 is a statement that defines the color of the displayed character to be blue. Statement 1106 is a statement that defines that the position of the displayed character string is displayed at the position (0.5, 0.5) in the two-dimensional coordinate system.

Statements 1109 to 1115 are statements defining camera 113. Statement 1109 is a statement that defines the resolution of the generated image. Statement 1110 is a statement that defines the aspect ratio of the camera frame.
Statement 1111 is a statement that defines the size of the screen on which the subject is imaged. Statement 1113 is a statement that defines a method of projecting a subject onto a screen. Statement 1114
And statement 1115 are statements defining the camera placement.

Statements 1116 to 1122 are statements defining an object. Statement 1116 is a statement that declares the beginning of a subject definition for a three-dimensional scene.
Statement 1117 is a statement that defines a light source that illuminates a three-dimensional scene. Thus, the light source is also defined within the subject definition section. Statement 1117 is a statement that defines the point light source 112. The parameters of statement 1117 are light source intensity, light source color, and light source position. Statement 1
Reference numeral 118 is a statement that defines the color of the subject 111. Statement 1119 is a statement that defines that the pattern of the subject 111 is the pattern / emboss defined in advance. Statement 1120 is a statement that defines the position of the subject 111.
Statement 1121 is a statement that defines that the subject 111 is a sphere having a radius of 1. Statement 1122 is a statement that declares the end of the subject definition for the three-dimensional scene.

Statement 1123 is a statement that declares the end of all parameter definitions for the 3D scene.

The three-dimensional image generating device 12 reads the data on the three-dimensional scene described above from the three-dimensional scene database 11 and generates an image of the three-dimensional scene. Then, the generated image is displayed on the display 14. Alternatively, the generated image is stored in the image database 13.

The image generating operation of the three-dimensional scene generator will be described below.

The three-dimensional scene input device 121 reads the data in the three-dimensional scene database 11 for each character string and sends the read character string to the three-dimensional scene interpretation device 122.

Here, the structure of the three-dimensional scene interpretation device 122 is shown in FIG.

As shown, the three-dimensional scene interpretation device 12
2 is a character string determination device 1220, a camera attribute setting processing group 1221, a subject attribute setting processing group 1222, a shape setting processing group 1223, a coordinate conversion processing group 1224, a mode control processing group 1225, a camera attribute table 1226, a subject attribute table 1227. , Result table stack 1228,
It is composed of a coordinate transformation stack 1229.

Here, the camera attribute setting processing group 1221
Is a set of processes corresponding to the statements 1109 to 1115 in the data shown in Table 1, respectively, and is a set of processes for setting the camera attributes specified by the parameters in the statement in the camera attribute table 1226. It is a set.

The object attribute setting processing group 1222 includes statements 1117 to 1120 in the data shown in Table 1.
2 is a set of processes corresponding to the above, and is a set of processes for setting a subject attribute in the subject attribute table 1227.

The coordinate conversion processing group 1224 includes statements 1114, 1115, 112 in the data shown in Table 1.
0 is a set of processes respectively corresponding to 0, and is a set of processes for setting the definition of coordinate conversion in the coordinate conversion stack 1229.

The mode control processing group 1225 includes statements 1101, 1116 and 112 in the data shown in Table 1.
2 and 1123 are a set of processes respectively corresponding to
It is a process of controlling the process of setting the current camera attribute and the process of setting the subject attribute. The camera attribute table 1226 has a resolution 1226 as shown in FIG.
1, pixel aspect ratio 12262, screen window 12263, lettering area 12264, screen projection method 12265, camera space 12268
It consists of items.

As shown in FIG. 6, the subject attribute table 1227 is a table defining all the attribute parameters of the subject. As shown in FIG. 6, the subject attribute table includes a color 12271, a light source 12272, an array 12273 of procedures for defining a pattern, a “procedure” parameter 12274,
Texture mapping space 12275, luster 12276,
And subject coordinates 12277.

Upon receiving the character string from the three-dimensional scene input device 121, the character string determination device 1220 determines whether the received character string is a parameter to be passed to the command or a command. Then, if the received character string is a parameter, the parameter is stacked on the result table stack 1228.

On the other hand, if the received character string is a command, it is received in the camera attribute setting processing group 1221, the subject attribute setting processing group 1222, the shape setting processing group 1223, the coordinate conversion processing group 1224, or the mode control processing group 1225. The process corresponding to the command is executed.

When "{" is input, the character string determination device 1221 does not execute the process for the character string until "}" is input, and the parameter is not processed. Result table stack 122
Stack to 5.

The operation of the three-dimensional scene interpretation device 122 that receives the data shown in Table 1 will be described below.

First, when the statement 1101 is received, the character determination device 1220 determines that it is a command, and the mode control processing group 122 corresponding to the statement 1101.
The processing in 5 is executed. The process corresponding to this statement 1101 initializes the three-dimensional generation processing device and sets the mode to the camera attribute setting mode. At this time, the coordinate conversion stack 1229 stores a space conversion matrix for converting the camera space into world space coordinates. In this embodiment, the coordinate axes ZA, YA, XA of the camera space are
Is the corresponding coordinate axis ZW, YW, XW of the world space
The linear camera space conversion matrix that is converted into the matrix is stored (see FIG. 2).

Next, the character determination device 1220 stores the input statements 1102 to 1108 in the result table stack 1228 as parameters.

When the state cloak 1109 is input, the character determination device 1220 stores the parameters "640, 480, 1.0" described in the first half in the result table stack 1228. , Starts the process in the camera attribute setting process group 1221 corresponding to the command “HR Format” described in the latter half. HR Format "
In the processing corresponding to the statement 1109, after confirming that the mode is in the camera attribute setting mode, the image resolution 12261 of the camera attribute table 1226 is stored in the result table stack 1228 by the character string determination device 1220. Three parameters in 640, 480, 1.0
Set to.

Statement 1110 to be input subsequently
The same processing is performed for the items 1 to 1113, and the pixel aspect ratio 12262 of the camera attribute table 1226, the screen window 12263, the lettering area 122.
64, each item of the projection method 12265 on the screen is set.

Subsequently, when the statement 1114 is input, the processing in the coordinate conversion processing group 1224 corresponding to the statement 1114 is performed, the conversion matrix as shown in the following equation is created, and stored in the coordinate conversion stack 1228. The product is multiplied with the existing camera space conversion matrix and the result is stored in the coordinate conversion stack 1228 as a conversion matrix.

[0063]

[Equation 1]

Here, θ is the first parameter 90.0 of the statement 1114, and x is the second parameter 1.
0 and y are the third parameter 0.0 and z is the fourth parameter 0.0.

Subsequently, when the statement 1115 is input, the processing in the coordinate transformation processing group 1224 corresponding to the statement 1115 is performed, and in the expression 1, the first parameter 0.0 of the statement 1115 is x and the second parameter is the second parameter. A transformation matrix with 5.0 as y and the third parameter 0.0 as z is created, and the product of the transformation matrix in the coordinate transformation stack 1228 is obtained. Is stored in the coordinate conversion stack 1229 as
This conversion matrix is a conversion matrix that converts the camera space into a space at the position indicated by a in FIG. 2 with the camera position in the world space as the origin.

Subsequently, when the statement 1116 is input, the character determination device 1220 executes the processing in the mode control processing group 1225 corresponding to the command 1116,
Camera space 12268 of camera attribute table 1226
Then, the conversion matrix stored in the coordinate conversion stack 1229 is set, and the mode is changed to the subject setting mode. At this time, the coordinate transformation stack 1229 also stores a subject space transformation matrix that transforms the subject space into world space coordinates. In the present embodiment, each coordinate axis Z in the subject space
B, YB, XB are the corresponding coordinate axes Z in the world space
A linear subject space conversion matrix that is converted into W, YW, and XW is stored (see FIG. 2). The coordinate conversion stack 1229 also stores a texture space conversion matrix for converting the texture space into world space coordinates. In this embodiment, a linear texture space conversion matrix is stored in which each coordinate axis ZC, YC, XC of the texture space is converted into each coordinate axis coordinate ZW, YW, XW of the corresponding world space (see FIG. 2). .

Next, the character determination device 1220 stores the input parameters in the statement 1117 in the result table stack 1228. Then, after confirming that the mode is in the subject attribute setting mode, the processing in the subject attribute setting processing group 1223 corresponding to the command in the statement 1117 is executed, and the subject attribute table 1
The light source 12272 of 227 is set with the parameter in the statement 1109 once stored in the result table stack.

Similarly, when the statement 1118 is input, the character determination device 1220 executes the processing corresponding to the statement 1118 in the object attribute processing group 1222, and the color 1227 of the object attribute table 1227.
1 stored in the result table stack 1228 once, the parameter "1.0 1.0" in the statement 1118
Set to 1.0 ".

Next, when the statement 1119 is input, the character determination device 1220 firstly, "emboss" as the first parameter and "as the second parameter".
Km0.5 "is stored in the result table stack 1228. Then, the command" HR Texture "is entered.
The processing in the subject attribute processing group 1222 corresponding to is executed. That is, the first parameter stored in the result table stack 1228 is determined, and the pattern definition “procedure” 12274 of the subject attribute table 1227 is first written together with the same character string “/ emboss” as the first parameter. The array of statements 1102 to 1108 stored in the result table stack 1228 is changed.

The second parameter of the result table stack 1228 is the procedure parameter 1227 as a parameter.
Store in 4.

Then, the texture mapping space 122
In 75, the texture space conversion matrix stored in the coordinate conversion stack 1229 is set.

Then, when the statement 1120 is input, the processing in the coordinate conversion processing group 1224 corresponding to the statement 1114 is performed, and in the expression 1, the first parameter 0.0 of the statement 11205 is x and the second parameter is the second parameter. A conversion matrix with 1.0 as y and the third parameter 0.0 as z is created, and the product is multiplied with the subject space conversion matrix in the coordinate transformation stack 1228, and the resulting transformation matrix is subject transformation. Coordinate transformation stack 1229 as matrix
To store. The subject transformation matrix is a transformation matrix for transforming the subject space into the space at the position indicated by b in FIG. 2 with the origin of coordinates (0, 1, 0) in the world space.

Next, when the statement 1121 is input, the character determination device 1220 causes the command "HRSph".
The processing in the shape setting processing group 1223 corresponding to “ere” is performed, and the subject transformation matrix stored in the coordinate transformation stack 1229 is set in the subject space 12277 of the subject attribute table 1227.

Then, the camera attribute table 1226, the subject attribute table 1227, the result table stack 12
The parameters in the statement 1121 stored in 28 and the shape identifier representing the sphere are sent to the three-dimensional image generation processing device 123.

Next, when the statement 1122 is input, the character string determination device 1220 sets the mode to the camera attribute setting mode by the processing in the corresponding mode control processing group 1225.

When statement 1123 is entered,
The character string determination device 1220 ends the processing of the three-dimensional scene interpretation device by the processing in the corresponding mode control processing group 1225.

Next, the camera attribute table 1226 and the subject attribute table 122 from the three-dimensional scene interpreter 122.
7 and the parameters stored in the result table stack 1228 and the shape identifier representing the sphere will be described below.

The three-dimensional image generation processing device 123 uses the shape identifier sent from the three-dimensional scene interpretation device 122, the parameters of the statement 1121, the contents of the camera attribute table 1226 and the subject attribute table 1227 to determine the 3 A three-dimensional image is created on the three-dimensional image memory 1236,
This is a device for outputting the contents of the three-dimensional image memory 1236 to the three-dimensional image output device 125.

The configuration of the three-dimensional image generation processing device 123 is shown in FIG.

The three-dimensional image generation processing device 123 comprises a projection processing device 1231, a pattern setting processing device 1232, a three-dimensional sampling processing device 1233, a texture mapping processing device 1234, a pattern image memory 1235 and a three-dimensional image memory 1236. ..

In the three-dimensional image generation processing device 123,
The projection processing device 1231 performs a projection process for obtaining a projected image of a subject on a camera screen.

The projection process is performed as follows.

First, the projection processing device 1231 interprets the parameters stored in the result table stack 1228 based on the shape identifier sent from the three-dimensional scene interpretation device 122.

In this embodiment, statement 11 in Table 1 is used.
In the result table stack 1228, 1.
The parameters 0, 1.0, -1.0, 360.0 are stored. When the received shape identifier indicates a sphere, the projection processing device 1231 uses the first parameter stored in the result table stack 1228 as the radius, the second parameter as the lower cut surface value, and the third parameter as the upper cut surface value. , The fourth parameter is interpreted as the sweep angle.
The object sphere thus interpreted is a sphere centered on the origin in the object space (see FIG. 2B).

Therefore, the position of the sphere in the subject space in the camera space is obtained, and the projected image of the subject on the camera screen is obtained.

That is, the object conversion matrix stored in the object space 12276 of the object attribute table 1227 is applied to the sphere to convert the parameters of the sphere into the parameters of the world space, and the obtained parameters are obtained in the world space. The parameter of the sphere in the camera space is obtained by applying the inverse matrix of the camera conversion matrix stored in the camera space 12266 of the camera attribute table 1226 to the parameter of the sphere. However, the subject conversion matrix stored in the subject space 12276 of the subject attribute table 1227 and the camera space 12 of the camera attribute table 1226.
The product of the inverse of the camera conversion matrix stored in 266 may be applied to the sphere to directly convert the parameters in the object space into the parameters in the camera space.

When the parameters of the sphere on the camera space are obtained in this way, the projection of the sphere onto the camera screen in the camera space is obtained to obtain the camera screen of the subject.
The parameters of the projected image on the screen can be obtained. The parameters of the projected image of the sphere projected on the camera screen become the parameters of a circle.

On the other hand, the pattern setting device 1232 determines the resolution of the pattern.

The resolution of the pattern is determined as follows.

First, the area of the projected image of the object projected on the camera screen in the camera space obtained by the projection processing device 1231 is obtained. Then, the resolution of the pattern is determined based on the obtained size of the area, and the subject attribute table 1
The resolution of the obtained pattern is sent to the two-dimensional image generation device 124 (see FIG. 1) together with the “procedure” array 12273 stored in 227.

How to obtain the pattern resolution will be described with reference to FIG.

FIG. 8 shows the camera screen.

Resolution 12 of camera attribute table 1226
From the contents of 261, the size of the camera screen 113 is 640 horizontal by 480 vertical.

The coordinate system of the screen is defined by a coordinate system in which the upper left is the origin and the lower right is (640, 480) as shown in FIG.

At this time, the projected image 111B of the subject sphere is
It is obtained from the circular parameters previously obtained by the projection processing device 1231.

Next, when a rectangular area including the area where the sphere is projected (the area indicated by the broken line in the figure) is obtained, the vertices on the diagonal line become the areas (272, 192) and (368, 288).

Therefore, since the area occupied by the projected sphere is a vertical 96 × horizontal 96 area, the pattern setting device 1332
Calculates the resolution of the pattern from the calculated area by using Equation 2.

Tres = region × 2--Equation 2 Here, Tres is the resolution of the desired pattern, which is 2 of the occupied area region of the rectangular area shape including the projected image.
That is, the resolution is doubled, that is, 192 in the vertical direction and 192 in the horizontal direction.

From Nyquist's theorem, the pattern of the subject is
An image having a spatial frequency twice as high as the spatial frequency determined by the resolution of the screen (that is, an image having a resolution) is sufficient. Therefore, if the resolution of the pattern is calculated by Equation 2, the pattern is clear and It is possible to generate an image with a sufficient resolution.

The pattern setting processing unit 1232 sets the resolution thus obtained, together with the "procedure" 12273 and the "procedure" parameter of the pattern of the subject attribute table 1227, to 2
Pass it to the three-dimensional image generation device.

Even if the resolution of the pattern is simply obtained from the size of the subject and the distance between the subject and the camera screen, it is possible to obtain a value close to the correct or insufficient resolution. If is not required, from the size of the subject and the distance between the subject and the camera screen,
The resolution of the pattern may be simply obtained.

Here, the three-dimensional image generation processing apparatus 12 is temporarily
Apart from the description of 3, the pattern generation operation of the two-dimensional image generation device 124 will be described.

First, FIG. 9 shows the configuration of the two-dimensional image generation apparatus.

As shown, the two-dimensional image generation device 12
4 is a data determination device 1240, a two-dimensional attribute setting processing group 1241, a character expansion processing 1242, and an image expansion processing 124.
It comprises a three-dimensional and two-dimensional sampling processor 1244, a two-dimensional graphic attribute table 1245, a work memory 1246, a parameter stack memory 1247, a character font database 1248 and an image database 1249.

The pattern "procedure" 12273 of the subject attribute table 1227 received by the two-dimensional image generating apparatus 124 includes the statements 1103 to 1103 in the data shown in Table 1.
1107 is stored. Therefore, when the data determination device 1240 of the two-dimensional image generation device 124 receives the array 12273 of the pattern “procedure” of the subject attribute table 1227, is it a parameter to be read in order and passed to the command? , It is a command,
If it is a parameter, the parameter stack memory 124
Store in 7. Also, the “procedure” parameter 12274 of the subject attribute table 1227 is stored in the two-dimensional figure attribute table 1245.

If it is a command, the processing corresponding to the command read in the two-dimensional attribute setting processing group 1241, the character development processing group 1242, or the image development processing group 1243 is executed.

When the statement 1103 is input from the pattern "Procedure" 12273 of the object attribute table 1227, the data judgment device 1240 causes the statement 1
After storing the parameter "Km1.0" in 103 in the parameter stack memory 1247, the command "para"
The processing in the two-dimensional attribute setting processing group 1241 corresponding to "mdef" is executed, and the parameter "Km1.0" 12274 is executed.
Is stored in the two-dimensional graphic attribute table 1245.

Statements 1104, 1105 and 11
Similarly, for 06, the character font type, font size, character color, and character layout position, which are parameters in each statement, are set in the two-dimensional graphic attribute table 1245.

In Table 1, in this embodiment, the font type is Gothic, the font size is 0.02, and the character string start positions are 0.5 and 0.5.

Next, when the statement 1207 is input, the parameter "aiueo" of the statement 1207 is stored in the parameter stack memory 1247, and then the character expansion processing group corresponding to the command "show". 1
The processing in 242 is performed.

The processing in the character expansion processing group 1242 is performed by the character code and the two-dimensional figure attribute table 124 which form the character string stacked in the parameter stack memory 1247.
This is a process for extracting the character outline data from the character font database 1248 based on the font type of No. 5, and converting the character outline data into the character outline data in the pattern definition space.

The character outline data is a vector-valued function indicating a curve forming the character outline. A vector-valued function representing a two-dimensional curve is generally Pu = {X (u), Y
(U)}, for example, a vector-valued function representing a circle with a radius of 1 is Pu = {cos (u), sin (u)}. The shape defined by such a vector-valued function can be enlarged without the occurrence of shading. For example, a vector-valued function Pu = {cos (u), sin (u)} that defines a circle centered at the origin and having a radius of 1
From the vector-valued function Pu = {Kco
s (u), Ksin (u)} can be obtained, and this vector value function Pu = {Kcos (u), Ksin
According to (u)}, if a curve is drawn, a circle with a radius K can be obtained without causing shading.

As a method for defining the shape by using such a vector value function, the Bezier method and the spline method are known.

The pattern definition space is the origin (0.0, 0.0)
And a coordinate (1.0, 1.0) is a rectangular two-dimensional space having diagonal vertices. ..

Conversion to character outline data on the pattern definition space is performed as follows.

That is, the three-dimensional image generation processing device 123
The character outline data retrieved from the character font database 1248 received from the character font database 1248 has a size of each character font of 0.02 in the pattern definition space, and the position of each character is sequentially from the coordinates (0.5, 0.5). Convert so that the position is laterally offset by the size of the font. The converted character outline data on the pattern definition space is also a vector value function. The converted character outline data on the pattern definition space is stored in the work memory 1246.

Character outline data in the pattern definition space is
Once stored in the memory 1246, the two-dimensional sampling processor 1244 expands the character outline data on the pattern definition space stored in the work memory 1246 into the texture space, and the pixels surrounded by the character outline are Then, a process of coloring with the color attribute of the character stored in the two-dimensional figure attribute table 1245 is performed.

The character outline data on the pattern definition space is expanded to the texture space as follows.

First, based on the resolution, vertical 192, and horizontal 182 received from the three-dimensional image generation processing device 123, the diagonal vertices are represented by (0.0, 0.0) on the XC-YC plane (see FIG. 2) of the texture space. 0.0) and (192.0, 19
2.0), assuming a rectangular image area.

Then, the character outline data in the pattern definition space is converted into the character outline data in the texture space. The conversion is performed by a linear conversion for converting the pattern definition space so that the pattern definition space overlaps the assumed rectangular image area on the texture space with the same size as much as possible. In the case of the present embodiment, this conversion is a simple expansion conversion.

In this way, the XC-YC plane of the texture space is set in the work memory based on the character outline data in the texture space thus obtained, and XC-Y
The values of the pixels in the work memory of the points in the area enclosed by the character outline on the C plane are first calculated in the two-dimensional figure attribute table 12
It is set according to the color attribute of the character stored in 45.

FIG. 11 is an image in which the “procedure” of the pattern defined in Table 1 is generated by the two-dimensional image generation device. The generated image has a resolution of 192 vertical and 192 horizontal. The character string "aiueo" defined as shown in the figure is displayed horizontally from the position of 96 vertical 96 horizontal.

The description of the two-dimensional image generation device 124 is completed above, and the description of the three-dimensional image generation processing device 123 is returned to.

Now, the three-dimensional image generation processing device 123
The three-dimensional sampling processing unit 1233 generates an image of a projected image of a subject with a pattern on the camera screen on the three-dimensional image memory.

The processing procedure of the three-dimensional sampling processor 1233 is shown in FIG.

First, the three-dimensional sampling processor 123
3 sets the camera screen plane of the camera space on the three-dimensional image memory 1236.

Next, the point inside the projected image of the object sphere on the camera screen is obtained from the previously determined circle parameters on the camera screen.

Then, the following processing is performed 12331 for each point (hatched portion in FIG. 6) inside the obtained projected image on the camera screen. The points inside the projected image on the camera screen that is the target of processing are called processing points.

First, the point on the object projected on the processing point is determined 12332. In this processing, the position of the subject in the camera space may be obtained in the same manner as when the projection image is obtained, and the point on the subject projected on the processing point may be obtained.

Next, the position of the point on the object thus obtained in the camera space on the texture space is obtained 12333. This processing is performed in the camera space 1 of the camera attribute setting table 1226.
The inverse matrix of the camera conversion matrix set to 2266 and the texture mapping space 12 of the subject attribute table 1227.
It is obtained by finding the product of the texture space transformation matrix set in 274 and transforming the points on the object in the camera space by the obtained matrix. The obtained position exists in the texture space.

Process 12334 is a process for activating the texture mapping processing device 1234. When the texture mapping processing device 1234 is activated, the processing 12334 is executed.
Passes the position on the texture space of the point on the subject obtained by processing 12333.

Texture mapping processor 1234
Calculates the color of the pattern attached to the point on the subject from the position on the texture space of the point on the subject passed from the process 12334. The obtained color is the color of the point on the camera screen on which the point on the subject is projected.

The process of obtaining the color of the pattern attached to the point on the subject from the position in the texture space is performed as follows.

First, the XC coordinate and the YC coordinate of the position of the obtained point on the object in the texture space are extracted. It is assumed that the XC coordinate just extracted is Q and the YC coordinate is P. Then, the XC of the texture space set on the work memory 1246
-Coordinates on YC plane (XC = Q, YC = P, ZC = 0)
The value of the pixel on the work memory corresponding to is calculated. Then, the obtained pixel value is set as the color of the pattern attached to the point on the subject.

By the way, in the above processing, in the texture space, when the pattern area on the XC-YC plane is different from the XC coordinate range in which the subject exists and the YC coordinate range, the points on the subject are determined. The pattern will not be attached. Therefore, in such a case, the texture mapping processing device 1234 moves the position of the point on the subject in the texture space, and the XC coordinate range and the YC coordinate range of the pattern area on the XC-YC plane are The color of the pattern attached to the point on the subject is obtained by keeping the subject within the range of the XC coordinates and the range of the YC coordinates.

Alternatively, in the data shown in Table 1, a step for designating the position in the world space where the texture space is converted is specified.
The three-dimensional scene interpreting device 122 may set the conversion matrix created according to this statement in the texture mapping space of the subject attribute table 1227.

Further, in the above processing, since the position of the point on the subject in the ZC direction in the texture space is not taken into consideration, the pattern will be somewhat distorted and will be coordinated to the subject. This distortion is corrected by post processing.

Now, the texture mapping processing device is
The color of the point on the subject thus obtained is passed to the processing 12335.

The processing 12335 sets the color returned from the texture mapping processing device 1234 as the color of the processing point,
The value of the corresponding pixel on the camera screen plane on the three-dimensional image memory 1236 is set to the obtained color.

When the above processing is completed for each point inside the projected image on the camera screen, the three-dimensional output device 125 is activated and the processing is completed.

The three-dimensional output device 125 outputs the image of the camera screen plane created in the three-dimensional image memory 1236 in the three-dimensional image generation processing device 123 to the external image database 13 and the display device 14.

By executing the above processing, it is possible to display the pattern of the subject relating to the three-dimensional scene.

In the present embodiment, the sphere is handled as the subject of the three-dimensional scene in order to simplify the description, but other shapes can be handled in the same manner.

Further, in the present embodiment, the subject whose shape is defined by the parameters has been described, but a subject whose shape is directly defined by three-dimensional dot data can be similarly processed.

Further, in the present embodiment, the texture is coded on the object without giving consideration to the position of the point on the object in the ZC direction in the texture space, giving priority to the speeding up of the processing. When the processing speed is not so high, it is necessary to reduce the distortion of the pattern by coordinating the position of the point on the object in the ZC direction in the texture space and the curved surface shape of the object. desirable.

A video production system using the image processing apparatus described in the first embodiment will be described below as the second embodiment.

The image production system is a system for producing an image such as an animation in accordance with a user's instruction.

First, FIG. 13 shows the configuration of a video production system according to the second embodiment.

As shown in the drawing, the video production system according to the present embodiment is a three-dimensional scene production system 21 for creating and editing a three-dimensional scene, a three-dimensional image generating device 22, and a video for recording and editing the created image. An editing system 23, a mouse 25, a keyboard 26, an image scanner 27 for capturing images such as photographs, and a three-dimensional scene database 28.
And character font database 29 and image database 3
0 and a display device 31.

The three-dimensional scene production system 21 includes a shape editing system 211 that creates and edits a shape, an attribute definition system 212 that defines attributes such as optical attributes and patterns in the created shape, and a pattern of a subject. It is composed of a paint system 213 for editing and a motion definition system 214 for defining motion in the created shape.

The three-dimensional image generation device 22, the three-dimensional scene database 28, the character font database 29, the image database 30, and the display device 31 constitute the image processing device according to the first embodiment.

The outline of the operation of the video production system will be described.

The three-dimensional scene production system 21 displays an input screen on the display 31 and receives an input of a subject, a motion of the subject, a pattern of the subject, and the like.

The user has the keyboard 26, mouse 25,
From the image scanner 27, a subject, a motion of the subject, a pattern of the subject, etc. are input.

The three-dimensional scene production system 21 creates the data shown in Table 1 in the first embodiment according to the input contents and writes it in the three-dimensional scene database 28.

The three-dimensional image generator 22 reads the three-dimensional scene database 28 and interprets the contents of the three-dimensional scene database to create an image. Then, the three-dimensional image generation device 22 stores the created image in the image database 30. Alternatively, the created image may be used as a contact image editing system 23.
Send to.

The video editing system 23 edits the image database 30 or an image sent directly to generate an animation or a final image.

Next, details of the operation of the three-dimensional scene generation system will be described.

When the three-dimensional scene production system 21 is activated, it displays the input screen shown in FIG.

In FIG. 14, an area 2111 is an area for inputting the arrangement of the subject.

The area 2112 is for the shape editing system 211.
This is an area for receiving the start instruction of. A region 2113 is a region for receiving a start instruction of the subject attribute definition system 212. An area 2114 is an area for receiving a start instruction of the action definition system 213. Area 2115 is an area for accepting a process activation instruction for canceling the input process. A region 2116 is a region for accepting the activation of the input work end processing. When these areas are picked by the mouse 25, the system corresponding to the specified area is activated.

Further, in FIG. 14, the shapes 2117 and 2118 are shown.
Is the input three-dimensional shape.

The shape editing system 211 is a system for defining and editing a three-dimensional shape. Shape editing system 21
1 receives a quadric surface, a free-form surface defined by control points, etc. as the shape of the subject. When the processing of the shape editing system 211 ends, the screen for input of the three-dimensional scene generation system 21 shown in FIG. 14 is returned to.

The attribute definition system 212 is a system which displays the input screen shown in FIG. 15 on the display 31 and accepts input of color, gloss, and pattern parameters as optical attributes of the subject. In FIG. 15, areas 2121, 2122, and 2123 are sliders that receive setting of color parameters. A region 2124 is a slider that receives setting of gloss parameters. The user moves the position of the slider by moving up and down while picking up the area of the slider with the mouse 25. The attribute definition system 212 accepts as a parameter a value determined according to the position of the moved slider.

A region 2125 is a region for accepting activation of the paint system 214 for setting a pattern. Area 212
When 5 is picked by the mouse 25, the attribute definition system 21 passes the processing to the paint system. The paint system 214 performs the processing described later and returns the pattern data to the attribute definition system 212. The attribute definition system 212 receives the returned pattern data as a pattern attribute. Area 2126 is an area for accepting activation of a process for canceling the set attribute. Area 2127 is an area for accepting activation of a process for ending the attribute definition system. .. When the processing of the attribute definition system 212 is completed, the screen for input of the three-dimensional scene generation system 21 shown in FIG. 14 is returned to.

The paint system 214 is a stem which displays the input screen shown in FIG. 16 on the display 31 and accepts the input of two-dimensional figures, images and characters as the pattern of the subject.

In FIG. 16, an area 2141 is an area where the user performs input work. Processing such as moving, editing, and transforming characters, figures, and images input in this area is performed. An area 2142 is an area for accepting activation of a process of capturing an image such as a photograph by the image scanner 27 or a process of extracting an image from the image database 30. Area 2143 is an area for accepting activation of a process for accepting input of a character string or a character. A region 2144 is a region for accepting activation of processing for defining a two-dimensional figure. Area 214
Reference numeral 5 is an area for accepting the activation of the process of canceling the input contents of the paint system 214 and returning to the attribute definition system. This is an area for accepting the activation of the process for ending the paint system 214 and returning to the attribute definition system. An area 2146 is an area for activating a process of returning to the attribute definition system when all input work is completed.

Now, in the paint system 214,
The input figures, characters, and images are registered in the order in which they were created. At this time, for the graphic, the vector data and the attribute of the graphic are directly registered. For a character, the attribute of the character and the code of the character are registered. For an image, pixel information is stored in the image database 27, and the name and attribute of the stored image are registered. Paint system 21
In No. 4, when the area 2146 is picked, the data of the registered character, figure, and image is returned to the attribute definition system 212, and the processing is ended. Characters 2147 in FIG. 16 are character strings and figures 2 input by the paint system 214.
148 is a figure. Is. The character string is the keyboard 26
By typing. The figure is input by the mouse 25. The figure is a rectangle, a circle, a free-form curve, or the like.

The behavior definition system 213 has the defined 3
Accepts dimensional shape motions. The motion is input by the motion definition data that defines the motion.

Such a three-dimensional scene production system 21
When the editing work by the 3D scene production system 21 is completed, the 3D scene production system 21 analyzes the shape and attributes of the received registered subject, and the description is given in Table 1 in the first embodiment. The data in the data format of the above-mentioned three-dimensional scene database is created, stored in the three-dimensional scene database 22, and the process ends. When storing, the data regarding the pattern is also stored in the database as the “procedure” as described above.

The three-dimensional image generation device 22 reads the data stored in the three-dimensional scene database 28 and generates an image. At this time, when the pattern is an image, the data read from the three-dimensional scene database 28 only contains information on the image definition name. Therefore, the image database 30 is searched based on this name, the image is imported, and To do. Characters and figures are processed in the same manner as in the image spine device of the first embodiment. The finally generated image is stored in the image database 30 or the video editing system 23
To end the process.

The video editing system 23 is a system for editing an image created by the three-dimensional image creating device 22 to create an animation.

FIG. 17 shows the configuration of the video editing system 23. As shown, the video editing system 23 is a VTR.
The editing system 231, the audio editing system 232, the frame buffer 233, and the VTR 234 are included.

The frame buffer 233 is a memory for temporarily storing an image. The VTR 234 is a device that records an image. The VTR editing system 231 captures images from the image database 30 into the frame buffer 233 in the frame buffer 241, and sequentially captures the captured images in the V
Record to TR234.

The audio editing system 232 is a system for adding sound to the video recorded in the VTR 234. The audio generated by the audio editing system 232 is recorded on the VTR 234 under the control of the VTR recording system 231.

[0176]

As described above, according to the present invention, it is possible to provide a high quality image and various types of patterns of arbitrary sizes to a three-dimensional shape of an image generation object based on a small amount of data. It is possible to provide a possible image processing method.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an image processing apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a space used for image generation processing in an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a method of defining a generated image according to an embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a three-dimensional scene interpretation device according to an embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a configuration of a camera attribute table used in an embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a structure of a subject attribute table used in an embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of a three-dimensional image generation processing device according to an embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a projected image of a subject on a camera screen according to an embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of a two-dimensional image generation device according to an embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a pattern definition space and a pattern generation space according to an embodiment of the present invention.

FIG. 11 is an explanatory diagram showing a pattern generated in one example of the present invention.

FIG. 12 is a flowchart showing the processing of the three-dimensional sampling processing apparatus according to the embodiment of the present invention.

FIG. 13 is a block diagram showing a configuration of a video production system according to an embodiment of the present invention.

FIG. 14 is an explanatory diagram showing an input screen generated by the video production system according to the embodiment of the present invention.

FIG. 15 is an explanatory diagram showing an input screen generated by the attribute definition system according to the embodiment of the present invention. Of the present invention

FIG. 16 is an explanatory diagram showing an input screen generated by the paint system according to the embodiment of the present invention.

FIG. 17 is an explanatory diagram showing a configuration of a video editing system according to an embodiment of the present invention.

[Explanation of symbols]

 11 three-dimensional scene data base 12 three-dimensional image generation device 13 image data base 14 display 121 three-dimensional scene input device 122 three-dimensional scene interpretation device 123 three-dimensional image generation processing device 124 two-dimensional image generation device 125 three-dimensional image output Device 21 3D scene production system 22 3D image generation device 23 Video editing system 25 Mouse 26 Keyboard 27 Image scanner 28 3D scene database 29 Character font database 30 Image database 31 Display device 211 Shape editing system 212 Attribute definition system 213 Paint system 214 Behavior Definition System

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsugio Tomita 4026 Kuji Town, Hitachi City, Ibaraki Prefecture Hitate Works, Ltd., Hitachi Research Laboratory (72) Inventor Akihiro Sakamoto 4026 Kuji Town, Hitachi City, Ibaraki Prefecture Nitate Works Co., Ltd. Hitachi Research Laboratory

Claims (10)

[Claims] 1. An image processing method for generating a photographed image of a subject having a three-dimensional shape, which is supposed to be photographed by an assumed camera screen, comprising: The texture resolution is determined according to the relative positional relationship, the texture having the determined resolution is generated from the texture pattern defined as a vector-valued function on a two-dimensional plane, and the generated texture is coded. An image processing method for generating a captured image of the captured subject, which is assumed to be captured by the camera screen. 2. The image processing method according to claim 1, wherein the resolution of the texture is determined according to the relative positional relationship between the assumed camera screen and the subject. Obtaining the projected image of the subject on the top, calculating the size of the obtained projected image of the subject, obtaining the resolution of the calculated projected image, and determining the resolution equivalent to the obtained projected image resolution as the texture resolution. An image processing method comprising: 3. An image processing apparatus for generating a photographed image of a subject having a three-dimensional shape, which is supposed to be photographed by an assumed camera screen, and defines a two-dimensional texture pattern. Texture data storage means for storing a vector value function, subject data storage means for storing subject data defining a three-dimensional shape of the subject, and designation of a relative positional relationship between the camera screen and the subject are accepted. The resolution of the texture is determined according to the input means, the subject data read from the subject data storage means, and the relative positional relationship received by the input means, and stored in the texture data storage means. It is assumed that an image is captured by the texture supply unit that generates a texture of the determined resolution from the vector value function, and the camera screen. An image processing apparatus comprising: a texture mapping unit that generates a captured image of the subject by coordinating the generated texture. 4. The image processing apparatus according to claim 3, wherein the texture supply unit is responsive to the subject data stored in the subject data storage unit and the relative positional relationship received by the input unit. Projection image calculation means for obtaining a projection image of the subject on the camera screen, and projection image resolution calculation means for calculating the size of the projection image obtained by the projection image calculation means to obtain the resolution of the projection image. A resolution of the projection image calculated by the projection image resolution calculation means from the vector value function stored in the texture data storage means according to the resolution of the projection image calculated by the projection image resolution calculation means. An image processing apparatus comprising: a texture generation unit that generates a texture having an equivalent resolution. 5. The image processing apparatus according to claim 3 or 4, wherein the texture data storage means stores a plurality of vector value functions that respectively define a plurality of texture patterns, and the input means A texture generation procedure including specification of a texture pattern used as a texture and specification of an attribute of a texture to be generated, and the texture supply unit receives the texture pattern specified by the texture generation procedure received by the input means. An image processing apparatus which reads a vector-valued function defining the above from the texture data storage means and generates a texture with an attribute designated by a texture generation procedure. 6. The image processing apparatus according to claim 5, wherein the plurality of texture patterns stored in the texture data storage means are character fonts of a plurality of characters,
An image processing apparatus characterized in that the designation of a texture pattern used as a texture in the texture generation procedure is designated by a character code of a character font used as a texture. 7. An image processing device according to claim 5, an image editing device, and an image output device, wherein the image editing device specifies a texture pattern to be used as a texture and attributes of a texture to be generated. And a procedure creating section for creating a texture generation procedure including specification of texture patterns and specification of texture attributes received by the user interface section. The input means of the image processing apparatus receives the texture generation procedure created by the procedure creation unit of the image editing apparatus, and the vector value function that defines the texture pattern designated by the texture generation procedure is used as the texture Read out from the data storage means and generate a texture with the attribute specified by the texture generation procedure, 3D scene generation system and outputs a pickup image of the subject texture mapping of the image processing apparatus is generated. 8. The three-dimensional scene generation system according to claim 7, wherein the user interface section of the image editing apparatus specifies a texture pattern to be used as a texture and an attribute of a generated texture. In addition to the above, the procedure creation unit interactively accepts the designation of the relative positional relationship between the camera screen and the subject and the designation of the three-dimensional shape of the subject. Creating a three-dimensional scene generation procedure including designation of the relative positional relationship between the camera screen and the subject received by the interface unit and designation of the three-dimensional shape of the subject, and inputting into the image processing apparatus. The means receives the three-dimensional scene generating procedure created by the procedure creating unit in the image editing apparatus, and the texture supplying unit is designated by the three-dimensional scene creating procedure received by the input unit. The subject data is read from the subject data storage means according to the designation of the three-dimensional shape, and the read subject data and the relative positional relationship between the camera screen designated in the three-dimensional scene generation procedure and the subject are displayed. The texture resolution is determined according to the specification, and the texture pattern specified by the texture generation procedure.
A three-dimensional scene generation system characterized in that a vector-valued function for defining a texture is read from the texture data storage means and a texture having a determined resolution is generated with an attribute designated by a texture procedure command. 9. The three-dimensional scene generation system according to claim 7, wherein the plurality of texture patterns stored in the texture data storage means are character fonts of a plurality of characters,
The image processing apparatus, wherein the user interface unit of the image editing apparatus receives designation of a character font used as a texture by designating a character. 10. The three-dimensional scene generation system according to claim 7, wherein the image generation and the image output are executed in real time based on the designation received by the user interface section of the image editing apparatus. A three-dimensional scene generation system characterized by: