凸包算法。寻找最少的点包围点云，可以用来绘制色空间的色域。-Convex hull algorithm. The least points will be founed surround all the point cloud, which coule be used to draw the color gamut for color space.

重要描述图像色域映射所需要的几何线条的处理，与色域映射有关系-Treatment, and important descr iption of the image gamut mapping color gamut mapping required geometric lines of a relationship

描述在色域映射中所使用的矩阵选择，公式选择，简单的介绍-Matrix selection described gamut mapping used in the formula to select, brief