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发明公开
CN102113305A 高动态范围纹理压缩 有权 转让

高动态范围纹理压缩
摘要：
一种用于压缩高动态范围(HDR)纹理的方法。可将红绿蓝(RGB)空间中的HDR纹理的纹理像素的第一块变换成亮度色度空间中的纹理像素的第二块。第一块可具有红色值、绿色值和蓝色值。第二块可具有亮度值和色度值。色度值可基于红色值的和、绿色值的和以及蓝色值的和。亮度值和色度值可被转换成8比特整数格式。可修改该亮度值以便将本地线性度属性还原到第二块。可压缩第二块。
摘要（英）：

A method for compressing a high dynamic range (HDR) texture is disclosed. A first block of texels of the HDR texture in a red-green-blue (RGB) space may be transformed to a second block of texels in a luminance-chrominance space. The first block may have red values, green values and blue values. The second block may have luminance values and chrominance values. The chrominance values may be based on a sum of the red values, a sum of the green values and a sum of the blue values. The luminance values and the chrominance values may be converted to an 8-bit integer format. The luminance values may be modified to restore a local linearity property to the second block. The second block may be compressed.

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