说明：  本算法首先对彩色图像变成YIQ空间，对所有图像的各个颜色分量进行小波分解，然后在小波变换域上根据某种策略选取系数，最后做小波反变换和YIQ反变换即得结果图像，有测试图，代码绝对能跑通 一起学习
(In this algorithm, the color image is first transformed into YIQ space, and each color component of all images is decomposed by wavelet, then the coefficients are selected according to a certain strategy in the wavelet transform domain, and finally the result image is obtained by wavelet inverse transform and YIQ inverse transform, with test diagram, the code can absolutely learn together)