抽取子图像: 通过一个随机混沌标签序列从原图像中抽取

对子图像加密:小波变换 ,在高频部分加密

重构原图，把加密好的子图像重新放回到原图像中

-from sub-images : a random chaotic sequence label from the original image from a tradition image encryption : wavelet transform, the high-frequency part of remodeling the maximum encryption, encrypted good son to re-up images back to the original image