理学 高维纹理 释 bidirectional texture function;BTF 双向纹理函数 传统的纹理是2维图像，表示物体在特定光照情况下某个视点所观察到的表面细节。而双向纹理函数（BTF）则是一个6维的函数，其中2维是纹理空间坐标，2维是视点方向，2维是入射光照方向。实际中通常是一组数千张图像的集合，其中每张图像都是纹理表面在不同的光照和相机位置下所拍摄的图像。
计算机应用 计算机辅助设计与图形学 释文 bidirectional texture function 双向纹理函数
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