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Diffusion Filtering for Image Denoising

version (587 KB) by Ritwik Kumar
Linear diffusion filtering, edge-enhancing linear and non-linear anisotropic filtering


Updated 17 Jul 2010

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An assortment of diffusion based image filtering methods:
1. Linear Diffusion Filtering using heat equations - solved using both implicit and explicit Euler methods.
2. Edge Enhancing Linear Anisotropic Diffusion Filtering.
3. Edge Enhancing Non-linear Anisotropic Diffusion Filtering.

Data files for test images are included. Each file is a script that implements one of the above methods. Read the comments for details.

Copyright (c) Ritwik Kumar, Harvard University 2010

Cite As

Ritwik Kumar (2021). Diffusion Filtering for Image Denoising (, MATLAB Central File Exchange. Retrieved .

Comments and Ratings (12)


Royi Avital

What about implementing the following method:



mops zaki

can i use

Ritwik Kumar

@jichao, Image denoising

jichao zhao

what kind of applications it may apply to ?

Jane Zhang

hi Ritwik, thanks for your reply. Looking for the new version :)

Ritwik Kumar

Hi Jane, it seemed like a typo in the comment. I fixed it and the updated files should be available soon. Thanks for pointing it out.

Jane Zhang

hi,Ritwik Kumar
in your "non-aniso.m", you said "non-aniso.m demonstrates Edge-preserving non-linear isotropic filtering for denoising".
why "non-aniso.m" demonstrates non-linear isotropic filtering?

Jane Zhang

"non-aniso.m", why it demonstrates Edge-preserving non-linear isotropic filtering"?

Ritwik Kumar

I think so, please try it and if you run into some trouble, let me know and I can suggest some work around.

reira wiratih

can I use matlab 7.8 (R2009)?

MATLAB Release Compatibility
Created with R2010a
Compatible with any release
Platform Compatibility
Windows macOS Linux

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