impulsive noise

A TVSCAD approach for image deblurring with impulsive noise

  • Guoyong Gu
  • Junfeng Yang
  • Suhong Jiang
    • Categories Nonsmooth Optimization Tags , , , , , , , ,

    We consider image deblurring problem in the presence of impulsive noise. It is known that \emph{total variation} (TV) regularization with L1-norm penalized data fitting (TVL1 for short) works reasonably well only when the level of impulsive noise is relatively low. For high level impulsive noise, TVL1 works poorly. The reason is that all data, both … Read more

    An efficient TVL1 algorithm for deblurring multichannel images corrupted by impulsive noise

  • Junfeng Yang
  • Wotao Yin
  • Yin Zhang
    • Categories Convex and Nonsmooth Optimization, Nonsmooth Optimization Tags , , , ,

    We extend a recently proposed alternating minimization algorithm to the case of recovering blurry multichannel (color) images corrupted by impulsive rather than Gaussian noise. The algorithm minimizes the sum of a multichannel extension of total variation (TV), either isotropic or anisotropic, and a data fidelity term measured in the L1-norm. We derive the algorithm by … Read more