用Arnold变换实现lena灰度图像的加密，然后用反变换对加密后的图像进行解密。-Lena grayscale images achieve encryption using Arnold transform, and then use the inverse transform of the image decrypting encrypted.

jpeg2000的matlab实现,包括实现的ppt,对图像处理和JPEG2000加密-Jpeg2000 of matlab upon, including the implementation of the PPT, for image processing and jpeg2000 encrypted upon