1. PDES in image processing
Talk at OU sigCAM
Meijun Zhu
, first talk.

5. Gaussian filter
Lena picture with Gaussian noise.

6. Experiment for Gaussian Filter
After three steps, it becomes better.
After more steps, it becomes blur.

10. Q-flow for denoise Left side: Affine flow; Right side: Q-flow.
More picture and comparison can be found at

15. Active Contour
The main goal here is to find the boundary of interesting area:

16. Discussion

17. Discussion
Psychological questions: illusions.
Experiments.

18. Other applications
Can the flow be used to reduce illusions?

19. Real problems Satellite images Medical images Signal processing
Nonlinear expression (comparing with Wavelets, etc.)