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CV in a Nutshell (||)

CV in a Nutshell (||). Yi Li http://users.cecs.anu.edu.au/~ yili/CVinNutshell.htm. Outline. Paper discussion Image Processing (overview) Diffusion Process Image Processing (filtering) Filter Banks Image Processing (filtering) Noise Removal. Paper discussion.

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CV in a Nutshell (||)

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  1. CV in a Nutshell (||) Yi Li http://users.cecs.anu.edu.au/~yili/CVinNutshell.htm

  2. Outline • Paper discussion • Image Processing (overview) • Diffusion Process • Image Processing (filtering) • Filter Banks • Image Processing (filtering) • Noise Removal

  3. Paper discussion • Edge detection and Smoothing • Diffusion • Homogenous • Isotropic • flux • Diffusion as PDE • whiteboard

  4. Paper discussion • Active Contours without Edges • Active shape • Snake • Active appearance • PDE

  5. Useful Concepts in SP • ARMA model • AR • MA • ARMA • Filtering / Filter banks

  6. Filtering • Fourier transform • Matrix-vector form • High pass, low pass, and band pass • Nyquist frequency • Filter banks • Downsample and upsample • Perfect reconstruction • JPEG compression

  7. Image Processing (1) • Histogram • Equalization • Color space conversion • RGB / HSV / LAB • Coding and Compression • Reconstruction • Medical imaging

  8. Image Processing (2) • Processing • Sharpening? • Smoothing? • Extracting useful information • Edge? • Boundary? • Texture analysis / synthesis? • Understanding?

  9. Useful Concepts in IP • Toeplitz matrix • Sampling • Transform • DFT • Cosine • Haar

  10. Motion deblurring • Y=Ax • Conjugate gradient descent • Trick: using convolution to solve the system effectively.

  11. Q/A

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