说明：  基于小波域的图形去噪matlab源代码-对应参考文献《Phase Preserving Denoising of Images》
(Code for denoising images. This code differs from standard wavelet denoising techniques in that it uses non-orthogonal wavelets, and unlike existing techniques, ensures that phase information is preserved in the image. Phase information is of crucial importance to human visual perception. Also, this code does have an effective way of determining threshold levels automatically. )