there are a non-local means denoising article, along with the code. After debugging, the code is correct.

matlab-nlm原码\mse.m
..............\Non-Local Means.m
..............\psnr代码1.m
..............\psnr代码2.m
..............\qilv.m
..............\ssim.m
..............\WSH.m
matlab-nlm原码

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