Approaches for sampling optimization and virtual increase in sampling volume are provided, improvement of the uniformity in output space and the bigger size of 3D-LUT have been obtained respectively.

• 建立了采样优化和采样点的虚拟扩充方法,由此改善输出采样点的空间分布均匀性和获得更大尺寸的三维查找表,进一步提高了查找表的变换精度。