图像加密解密一法

　　这个程序的来源是《数字图像处理原理与实践——基于Virsual C++开发》(左飞 万晋森 刘航著)随书光盘中的一个程序。

　　只是原程序运行时速度很慢，我使用了多线程技术，并把像素调换变成块(8×8象素)调换，速度有了改善。-A method of image encryption and decryption

Source of this program is　digital image processing theory and practice- based Virsual C++ Development　(left fly with 000 Shanxi Liu Hang Sen) CD with the book in a program.

But the original program is running very slow, I use multi-threading technology, and the exchange of pixels into a block (8 × 8 pixels) exchange, the speed has been improved.