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1. 发明授权

US06819793B1 Color distribution for texture and image compression 失效
标题翻译：纹理和图像压缩的颜色分布
公开(公告)号：US06819793B1
公开(公告)日：2004-11-16
申请号：US09607669
申请日：2000-06-30
申请人： Alexander Reshetov , Yevgeniy Kuzmin , Denis Ivanov
发明人： Alexander Reshetov , Yevgeniy Kuzmin , Denis Ivanov
IPC分类号： G06K900
CPC分类号： H04N1/644 , G06T9/005 , G06T11/001
摘要： A block decomposition based method is provided for compressing textures based on sharing color information between texture blocks. The texture map is divided into a plurality of texture blocks containing texels. During compression a first color value is stored for a first block and a second color value is stored for a second block. A palette is created for each texture block using the color values stored for several neighboring texture blocks. Each texel in each of the texture blocks is indexed to one of the colors in the palette. Accordingly the method compresses the information in the texture map by storing for each texture block bits representing a color value and bits to index each of the texels to a color in the palette, which allows sharing of color information between blocks. During decompression the palettes are regenerated and colors from the palette are assigned to the texels according to the stored index values. Accordingly, the decompression of the texture allows regeneration of the compressed texture, which may be mapped to surfaces to improve the visual quality of three-dimensional graphics.
摘要翻译：提供了基于块分解的方法，用于基于在纹理块之间共享颜色信息来压缩纹理。纹理贴图被分成包含纹素的多个纹理块。在压缩期间，为第一块存储第一颜色值，并且为第二块存储第二颜色值。使用为几个相邻纹理块存储的颜色值为每个纹理块创建调色板。每个纹理块中的每个纹素都被索引到调色板中的一种颜色。因此，该方法通过存储表示颜色值的每个纹理块位和将每个纹理像素索引到调色板中的颜色的位置来压缩纹理映射中的信息，这允许在块之间共享颜色信息。在解压缩期间，调色板被再生，并且调色板中的颜色根据存储的索引值被分配给纹素。因此，纹理的解压缩允许压缩纹理的再生，其可以映射到表面以改善三维图形的视觉质量。

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