计算DWT小波变换的JND值（恰可察觉性失真），用于图像水印的实现。以及DCT的水印实现-Calculate the DWT wavelet transform value of JND (Just Noticeable Distortion) for the image watermark. As well as the watermark of the DCT

彩色图像数字水印的实现，采用了JND方法。透明性和鲁棒性好-Color image watermarking realized, using JND methods. Transparency and robustness