说明：  用matlab实现color moments算法，先把rgb图像转换到HSV空间，然后计算每个分量的一二三阶矩，最后组成9维向量进行比较。
(Using color moments algorithm matlab realize, first convert rgb images to HSV space, and then calculated for each component of the 123-order moments, the final composition of 9-dimensional vector for comparison.)