JP2023045392A - Image data generation apparatus, image data generation method, and image data generation program - Google Patents

Abstract

To draw gradation texture with a low load.SOLUTION: An image data generation apparatus 100 is configured to access a storage unit 12 which stores texture data for an image represented with luminance of each of pixels, and gradation data including multiple pieces of color curve data obtained by allocating different colors to the luminance, and generates a texture image using colors corresponding to luminance values of the pixels, as colors of the pixels, for each of the pixels of the image included in the texture data, using the color curve data included in the gradation data.SELECTED DRAWING: Figure 1

Description

The present invention relates to an image data generation device, an image data generation method, and an image data generation program.

When displaying an image on a computer, a texture including a gradation that gradually changes colors in an image area may be rendered. For example, in a game providing apparatus for providing an electronic game executed by a computer, visual effects (VFX) for expressing game effects and patterns for expressing the texture of character costumes may be drawn as textures. (Patent document 1).

When drawing such textures, an existing DCC tool for creating three-dimensional computer graphics (3DCG) is used. At this time, a preset gradation color bar is synthesized with a texture (pattern texture) that expresses a pattern in a gray scale that indicates each pixel with a luminance gradation, and the same pattern is displayed according to the luminance value. (Non-Patent Documents 1 and 2). For example, a technology is disclosed that uses the lifetime of particles to add color gradation to particles having texture. Further, for example, a technique of synthesizing a plurality of gradation data to generate one gradation and applying it to an image is disclosed.

Japanese Patent Application Laid-Open No. 2020-046732

https://styly.cc/ja/tips/unity_fireworks01/ https://ics.media/entry/200212/

By the way, in the conventional technology, one color bar image is prepared for each texture image pattern in order to synthesize the texture image. Therefore, in order to add multiple color gradations to one texture image, the graphic designer had to create multiple processing packages in which one color bar image is associated with the texture image. Sometimes hundreds of texture images (gradation textures) are created in the process of creating an electronic game, and creating multiple processing packages for a single texture image is a bottleneck in the workflow. was becoming There is also a problem that a large amount of computer memory is consumed to store a plurality of processing packages.

In one aspect of the present invention, it is possible to access a storage unit that stores texture data representing an image with luminance for each pixel, and gradation data including a plurality of color curve data in which different colors are assigned to the luminance. wherein, for each pixel of the image included in the texture data, the texture image is generated using the color curve data included in the gradation data as the color of the pixel corresponding to the luminance value of the pixel. It is an image data generating device that

Here, color curve data to be used for processing is selected from the plurality of color curve data included in the gradation data according to the elapsed time in generating the texture image, and the selected color curve data is used to It is preferable to generate the texture image with the color corresponding to the luminance value of the pixel as the color of the pixel.

Further, color curve data to be used for processing is selected from the plurality of color curve data included in the gradation data according to the display position of the texture image, and the selected color curve data is used to obtain the luminance value of the pixel. It is preferable to generate the texture image with the color corresponding to the pixel as the color of the pixel.

Further, color curve data to be used for processing is selected from the plurality of color curve data included in the gradation data according to changes in the pattern of the texture image, and the selected color curve data is used to determine the brightness of the pixel. It is preferable to generate the texture image with the color corresponding to the value as the color of the pixel.

Further, it is preferable to generate a texture image by using color curve data obtained by interpolating the two color curve data included in the gradation data so that the color corresponding to the luminance value of the pixel is used as the color of the pixel.

Another aspect of the present invention is to use texture data representing an image with luminance for each pixel, and gradation data including a plurality of color curve data in which different colors are assigned to the luminance, and an image data generation method, wherein a texture image is generated for each pixel of an image that contains a color corresponding to a luminance value of the pixel by using the color curve data included in the gradation data. be.

Another aspect of the present invention is accessible to a storage unit that stores texture data representing an image with luminance for each pixel, and gradation data including a plurality of color curve data in which different colors are assigned to the luminance. means for generating a texture image by using the color curve data included in the gradation data for each pixel of the image included in the texture data, with the color corresponding to the luminance value of the pixel being the color of the pixel; It is an image data generation program characterized by functioning as

The image data generating device, image data generating method, or image data generating program can be applied to an electronic game providing device, an electronic game providing method, and an electronic game providing program.

According to the present invention, it is possible to provide an image data generation device, an image data generation method, and an image data generation program that enable drawing of a gradation texture with a low load. Other objects of embodiments of the present invention will become apparent by reference to the specification as a whole.

It is a figure which shows the structure of the image data generation apparatus in embodiment of this invention. It is a figure which shows the example of the texture data in embodiment of this invention. FIG. 4 is a diagram showing an example of gradation data according to the embodiment of the invention; FIG. FIG. 4 is a diagram showing an example of gradation data according to the embodiment of the invention; FIG. 4 is a flow chart showing an image data generation method according to the embodiment of the present invention; It is a figure explaining the image data generation process in embodiment of this invention. It is a figure explaining the image data generation process in embodiment of this invention. It is a figure explaining the image data generation process in embodiment of this invention.

The image data generation device 100 according to the embodiment of the present invention includes a processing section 10, a storage section 12, an input section 14, an output section 16 and a communication section 18, as shown in FIG. The processing unit 10 includes means for performing arithmetic processing such as a central processing unit (CPU) and a graphics processing unit (GPU). By executing the image data generation program stored in the storage unit 12, the processing unit 10 realizes the functions related to image data generation in the present embodiment. The storage unit 12 includes storage means such as a semiconductor memory and a memory card. The storage unit 12 is connected to the processing unit 10 so as to be accessible, and stores an image data generation program and information necessary for the processing. The input unit 14 includes means for inputting information. The input unit 14 includes, for example, a keyboard, a touch panel, buttons, etc. for receiving information input from the user. The output unit 16 includes means for outputting a user interface screen (UI) for accepting input information from an administrator and processing results. The output unit 16 includes, for example, a display that presents images. The communication unit 18 includes an interface for communicating information with an external terminal (not shown) via the network 102 . Communication by the communication unit 18 may be wired or wireless. Information used for image data generation may be acquired from an external terminal via the communication unit 18 .

The image data generation device 100 can be, for example, a personal computer (PC), a smart phone, a tablet terminal, or the like. The image data generating device 100 may function as part of an electronic game providing device for providing electronic games. In the image data generating device 100, the processing section 10 can be configured including a CPU and a GPU. The GPU is processing means provided separately from the CPU, and exclusively performs image processing based on instructions from the CPU. When an image is displayed on the output unit 16 such as a display, the GPU executes a decoding program to decode the model data and restore it to displayable image data.

In this embodiment, the GPU uses texture data and color curve data representing color gradation stored in the storage unit 12 to change the color scheme according to the luminance value based on the pattern texture represented by the texture data. process to generate a texture image (gradation texture).

As shown in FIG. 2, the texture data is a pattern that expresses an image including visual effects (VFX) that express effects in the game and patterns for expressing the texture of the character's costume, etc., with brightness levels for each pixel. Information including texture. For example, a pattern texture that expresses the luminance of each pixel in a luminance value range of 0 to 1 can be used as texture data.

The color curve data, as shown in FIG. 3, is information in which colors are associated with brightness values representing texture data. Note that in FIG. 3, the change in color is expressed in grayscale because color representation is not possible. For example, color curve data representing a gradation in which color components that gradually change from yellow to red are associated with brightness values in the range of 0 to 1 can be used. Similarly, for example, color curve data representing a gradation in which gradually changing color components such as red, green, and blue are associated with luminance values in the range of 0 to 1 can be used. As shown in FIG. 4, the color curve data is stored in the storage unit 12 as gradation data in association with the luminance value of the pattern texture.

The range of color change in one color curve data is not particularly limited, and various color changes can be associated in one luminance value range. Also, the color curve data may be a gradation in which the transparency is changed in addition to the color.

In this embodiment, a plurality of color curve data indicating different gradations are set for the same luminance value range, and image data is generated using the gradation data including the plurality of color curve data.

The image data generation method according to the present embodiment will be described below with reference to the flowchart of FIG. It is assumed that pattern texture and color curve data used to generate a texture image (gradation texture) are stored in the storage unit 12 in advance before the image data generation process is executed. Further, processing by the processing unit 10 will be described below as processing by the CPU or GPU.

In step S10, the pattern texture corresponding to the texture image to be drawn is read. Through the processing of this step, the image data generation device 100 functions as pattern texture acquisition means.

The processing unit 10 reads pattern textures stored in the storage unit 12 . For example, when the GPU performs image data generation processing, information specifying texture data corresponding to an image to be drawn is received from the CPU, and the GPU reads the pattern texture included in the texture data from the storage unit 12 .

In step S12, color curve data to be used for processing is selected from among a plurality of color curve data included in the gradation data. Through the processing of this step, the image data generation device 100 functions as color curve data selection means.

The processing unit 10 selects color curve data for coloring the pattern texture according to predetermined conditions from a plurality of color curve data included in the gradation data. The selection conditions can be the elapsed time in the generation of the texture image, the display position of the texture image, and the change in the pattern of the pattern texture from which the texture image is based.

When the elapsed time in texture image generation is used as a selection condition, processing of multiple color curve data included in gradation data is performed according to the elapsed time from the start of texture image generation from the pattern texture to be processed. Select the color curve data used for For example, for a given texture image, color curve data 1 is selected at the start of generation, and color curve data 2, color curve data 3, .

At this time, when the selection is shifted from the currently used color curve data to another color curve data according to the elapsed time, the current color curve data and the next color curve data are gradually changed. You may interpolate and use one color curve data.

When the display position of the texture image is used as a selection condition, the color used for processing among the multiple color curve data included in the gradation data is selected according to the display position of the texture image on the screen (coordinates of the texture image on the screen). Select curve data. For example, when a certain texture image is displayed on a screen with a resolution of (1920, 1080), the display position of the texture image is calculated from coordinates (X=0, Y=0) on the screen to coordinates (X=1919, Y= 269), color curve data 2 is selected from coordinates (X=0, Y=270) to coordinates (X=1919, Y=539), and coordinates (X=0, Y=539) are selected. = 0) to coordinates (X = 1919, Y = 539) select color curve data 2, and from coordinates (X = 0, Y = 540) to coordinates (X = 1919, Y = 809) select color curve data 3 is selected, and color curve data 4 is selected from coordinates (X=0, Y=810) to coordinates (X=1919, Y=1079).

At this time, a transition area is provided when the selection is shifted from the currently used color curve data to another color curve data according to the display position of the texture image. The two color curve data may be interpolated and used so as to gradually change to the color curve data of .

When changing the pattern of the pattern texture that is the basis of the texture image is the selection condition, prepare several patterns of the pattern texture, and select multiple color curve data included in the gradation data according to the pattern to be used. Select the color curve data to be used for processing. For example, three pattern textures, patterns 1 to 3, are prepared as the basis of texture images, and color curve data 1 is selected for pattern 1, color curve data 2 is selected for pattern 2, and color curve data 2 is selected for pattern 3. Color curve data may be selected in order such that data 3 is selected. Alternatively, the pattern texture may be changed continuously, and the color curve data to be used for processing may be selected from the plurality of color curve data included in the gradation data according to the change.

At this time, a transition area is provided when the selection is shifted from the currently used color curve data to another color curve data according to the pattern of the pattern texture. Two color curve data may be interpolated and used so as to gradually change to the color curve data.

In step S14, a process of sequentially selecting pixels forming the pattern texture is performed. Through the processing of this step, the image data generation device 100 functions as pixel selection means.

The processing unit 10 selects one pixel from the pattern texture read in step S10. That is, the pixels forming the pattern texture included in the texture data are selected one by one. For example, pixels may be selected in order from the upper left pixel to the lower right pixel each time the process is shifted to this step.

In step S16, a process of reading the luminance value of the selected pixel is performed. Through the processing of this step, the image data generation device 100 functions as a luminance value acquisition unit.

The processing unit 10 performs a process of reading the luminance value from the texture data for the pixels selected in step S12. In texture data, for example, the brightness of each pixel is expressed in a brightness value range of 0-1. Thus, luminance values ranging from 0 to 1 are obtained for the selected pixels.

In step S18, a process of assigning colors corresponding to luminance values of pixels with reference to color curve data is performed. Through the processing of this step, the image data generation device 100 functions as a color setting means.

The processing unit 10 refers to the color curve data selected in step S12 to obtain color component values corresponding to the luminance values read out in step S14. A color component value is obtained for each pixel forming a texture image (gradation texture).

For example, as shown in FIG. 6, when the color curve data is defined continuously with respect to the luminance value of the pixel, the color corresponding to the luminance value of the pixel read in step S16 in the color curve data is is set to Further, for example, as shown in FIG. 7, when color curve data is discretely defined for luminance values of pixels, colors set for adjacent luminance values are interpolated, and in step S16 A color corresponding to the read luminance value of the pixel is set to the pixel. For example, as shown by the thick dashed line in FIG. 7, the color corresponding to the luminance value read in step S16 can be calculated by linearly approximating and interpolating between the adjacent luminance values for which the color is defined. . Also, when color curve data is discretely defined for luminance values of three or more pixels, the color curve is fitted by a mathematical function, and interpolation is performed using the function obtained by the fitting. By doing so, the color corresponding to the luminance value read in step S16 may be calculated.

In addition, the two color curve data are interpolated so that the current color curve data and the next color curve data gradually change when the selection is transferred from the currently used color curve data to another color curve data. may be used as For example, as shown in FIG. 8, at the transition between the current color curve data 1 and the next color curve data 2, the color corresponding to the luminance value of the pixel read in step S16 in the color curve data 1 and the color curve A color obtained by interpolating between the color corresponding to the luminance value of the pixel read out in step S16 in Data 2 and the color corresponding to the luminance value of the pixel is set to the pixel.

In step S20, it is determined whether or not processing has been completed for all pixels. Through the processing of this step, the image data generation device 100 functions as processing determination means.

The processing unit 10 determines whether or not all the pixels of the image included in the pattern texture read out in step S10 have been processed. If all pixels have not been processed, the process returns to step S12, and if all pixels have been processed, the image data generation process ends.

As described above, for all the pixels of the image included in the pattern texture, by referring to the color curve data and setting the color component values based on the luminance values, the colors corresponding to the luminance values of the pixels of the pattern texture are obtained. A texture image (gradation texture) can be generated.

As described above, according to the image data generation device 100 of the present embodiment, a texture image (gradation texture) can be generated by low-load processing based on texture data and color curve data. In particular, color curve data to be used for processing is selected from gradation data including a plurality of color curve data, and the selected color curve data is used to generate a texture image with the color corresponding to the luminance value of the pixel as the color of the pixel. . Therefore, it is possible to increase the variation of expression modes of the texture image compared to the case where a single color curve data is used for one texture image. Therefore, in an electronic game in which texture images (gradation textures) are frequently used in VFX, the expression of texture images (gradation textures) can be enriched.

Also, the graphic designer does not need to create multiple processing packages that associate one color bar image with the texture image, which reduces the burden on the workflow. Furthermore, it is possible to reduce the consumption of computer memory required to store multiple processing packages.

10 processing unit, 12 storage unit, 14 input unit, 16 output unit, 18 communication unit, 100 image data generation device, 102 network.

Claims (7)

Accessible to a storage unit that stores texture data representing an image with luminance for each pixel, and gradation data including a plurality of color curve data in which different colors are assigned to the luminance,
For each pixel of the image included in the texture data, the texture image is generated using the color curve data included in the gradation data, with the color corresponding to the luminance value of the pixel being the color of the pixel. Image data generator. The image data generation device according to claim 1,
selecting color curve data to be used for processing from the plurality of color curve data included in the gradation data according to the elapsed time in generating the texture image, and using the selected color curve data to obtain the luminance value of the pixel; An image data generation device characterized by generating a texture image with a color corresponding to the pixel as the color of the pixel. The image data generation device according to claim 1 or 2,
Selecting color curve data to be used for processing from the plurality of color curve data included in the gradation data according to the display position of the texture image, and using the selected color curve data to correspond to the luminance value of the pixel. 1. An image data generation device, characterized in that it generates a texture image with the color of the pixel being the color of the pixel. The image data generation device according to any one of claims 1 to 3,
selecting color curve data to be used for processing from the plurality of color curve data included in the gradation data according to changes in the pattern of the texture image, and using the selected color curve data to determine the luminance value of the pixel; 1. An image data generation device, characterized in that a texture image is generated with a corresponding color as the color of the pixel. The image data generation device according to any one of claims 1 to 4,
An image data generating apparatus, wherein a texture image is generated by using color curve data obtained by interpolating the two color curve data included in the gradation data, and using a color corresponding to a luminance value of the pixel as the color of the pixel. . For each pixel of the image included in the texture data, the above An image data generating method, comprising: generating a texture image using the color curve data included in the gradation data with a color corresponding to the luminance value of the pixel as the color of the pixel. A computer capable of accessing a storage unit that stores texture data representing an image with luminance for each pixel, and gradation data including a plurality of color curve data in which different colors are assigned to the luminance,
For each pixel of the image included in the texture data, using the color curve data included in the gradation data, the color corresponding to the luminance value of the pixel is used as the color of the pixel to function as a means for generating a texture image. An image data generation program characterized by

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