说明：  BM3D图像去噪算法。当下较为先进的图像去噪算法，可以对图像进行较好的去噪。在代码中包含了彩色图像，运动图像等多种bm3d去噪。
(BM3D image denoising. Present a more advanced image denoising algorithm, can be a good image denoising. Included in the code of color images, moving images, and other bm3d denoising.)