1. Math 3360: Mathematical Imaging
Lecture 13:
Non-local mean filtering, Laplacian mask, Unsharp masking,
Isotropic diffusion, Anisotropic diffusion
Prof. Ronald Lok Ming Lui Department of Mathematics,
The Chinese University of Hong Kong

2. Non-local mean filter

3. Non-local mean filter

4. Non-local mean filter
Noisy image
Non-local mean

5. Non-local mean filter
Flat filter
Non-local mean

6. Laplacian mask

7. Laplacian mask
Original image
Laplacian mask

8. Laplacian mask
Original image
Laplacian mask

9. Laplacian mask
Original image
Laplacian mask

10. Unsharp masking

11. Unsharp masking

12. Isotropic diffusion Original image Sigma = 1.98 Sigma = 4.28

13. Anisotropic diffusion