A computationally efficient superresolution image reconstruction algorithm

  title={A computationally efficient superresolution image reconstruction algorithm},
  author={Nhat Nguyen and Peyman Milanfar and Gene H. Golub},
  journal={IEEE transactions on image processing : a publication of the IEEE Signal Processing Society},
  volume={10 4},
Superresolution reconstruction produces a high-resolution image from a set of low-resolution images. Previous iterative methods for superresolution had not adequately addressed the computational and numerical issues for this ill-conditioned and typically underdetermined large scale problem. We propose efficient block circulant preconditioners for solving the Tikhonov-regularized superresolution problem by the conjugate gradient method. We also extend to underdetermined systems the derivation of… CONTINUE READING
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