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A Nuclear-norm Model for Multi-Frame Super-Resolution Reconstruction from Video Clips

Abstract · Apr 17, 2017 17:17 ·

mfsr image hkrgc wavelet frames resolution frame cs-cv

Arxiv Abstract

  • Rui Zhao
  • Raymond H. Chan

We propose a variational approach to obtain super-resolution images from multiple low-resolution frames extracted from video clips. First the displacement between the low-resolution frames and the reference frame are computed by an optical flow algorithm. Then a low-rank model is used to construct the reference frame in high-resolution by incorporating the information of the low-resolution frames. The model has two terms: a 2-norm data fidelity term and a nuclear-norm regularization term. Alternating direction method of multipliers is used to solve the model. Comparison of our methods with other models on synthetic and real video clips show that our resulting images are more accurate with less artifacts. It also provides much finer and discernable details.

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