pdes in image processing

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PDES in image processing. Talk at OU sigCAM Meijun Zhu. Gaussian filter. Lena picture with Gaussian noise. Experiment for Gaussian Filter. After three steps, it becomes better. After more steps, it becomes blur. Q-flow for denoise. Left side: Affine flow; Right side: Q-flow. - PowerPoint PPT Presentation

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  • PDES in image processingTalk at OU sigCAM

    Meijun Zhu

  • Gaussian filterLena picture with Gaussian noise.

  • Experiment for Gaussian FilterAfter three steps, it becomes better.

    After more steps, it becomes blur.

  • Q-flow for denoiseLeft side: Affine flow; Right side: Q-flow.More picture and comparison can be found athttp://www.math.ou.edu/~yni/flow.html

  • Active ContourThe main goal here is to find the boundary of interesting area:

  • Discussion

  • DiscussionPsychological questions: illusions.

    Experiments.

  • Other applicationsCan the flow be used to reduce illusions?

  • Real problemsSatellite images

    Medical images

    Signal processing

    Nonlinear expression (comparing with Wavelets, etc.)

    2-28-2007, first talk.