中文说明：“求RGB转HSI空间小程序.m”为主函数调用rgb2hsi.m，由于matlab没有自带这个函数，所以自编了一个，用于进行阴影去除。
English Description：
"RGB to HSI space applet. M" is called as the main function of rgb2hsi. M. since matlab does not have this function, we have compiled one for shadow removal.