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1. 发明申请

WO2011126424A1 TEXTURE COMPRESSION AND DECOMPRESSION 审中-公开
标题翻译：纹理压缩和分解
公开(公告)号：WO2011126424A1
公开(公告)日：2011-10-13
申请号：PCT/SE2011/050145
申请日：2011-02-09
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (publ) , RASMUSSON, Jim , DOGGETT, Michael , STRÖM, Jacob , WENNERSTEN, Per
发明人： RASMUSSON, Jim , DOGGETT, Michael , STRÖM, Jacob , WENNERSTEN, Per
IPC分类号： G06T9/00 , H04N7/26
CPC分类号： G06T9/00
摘要： Embodiments relate to compression and decompression of textures. A texel block (10) is compressed by specifying two major directions in the texel block (10) and defining the profiles of how the texel values change along the respective directions. The resulting compressed texel block (30) comprises two value codewords (31, 32), two line codewords (35-38) and a function codeword (33, 34). The two value codewords (31, 32) are employed to calculate two texel values for the texel block (10). The line codewords (35-38) are employed to determine equations of two lines (20, 22) coinciding with the two major directions in the texel block (10). Signed distances are calculated for each texel (12) from the texel position in the texel block (10) and to the two lines (20, 22). The signed distances are input to a function defined by the function codeword (33, 34) to output two values from which weights are calculated and applied to the two texel values in order to get a representation of the texel value of a texel (12).
摘要翻译：实施例涉及纹理的压缩和解压缩。通过在纹素块（10）中指定两个主要方向来压缩纹理块（10），并且定义纹理值沿着各个方向如何变化的轮廓。所得到的压缩纹理块（30）包括两个值码字（31,32），两行码字（35-38）和一个功能码字（33,34）。两个值码字（31,32）用于计算纹素块（10）的两个纹素值。行码字（35-38）用于确定与纹理块（10）中的两个主要方向一致的两条线（20,22）的等式。从纹理块（10）中的纹素位置和两条线（20,22）中的每个纹理像素（12）计算签名距离。有符号距离被输入到由功能代码字（33,34）定义的函数，以输出计算权重的两个值并将其应用于两个纹素值，以便获得纹素的纹理值的表示（12）。

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