Super-resolution using preconditioned conjugate gradient method

Changjiang Yang; Ramani Duraiswami; Larry S. Davis

doi:10.1117/12.477201

31 July 2002 Super-resolution using preconditioned conjugate gradient method

Changjiang Yang, Ramani Duraiswami, Larry S. Davis

Proceedings Volume 4875, Second International Conference on Image and Graphics; (2002) https://doi.org/10.1117/12.477201
Event: Second International Conference on Image and Graphics, 2002, Hefei, China

Abstract

In this paper we present a fast iterative image superresolution algorithm using preconditioned conjugate gradient method. To avoid explicitly computing the tolerance in the inverse filter based preconditioner scheme,1 a new Wiener filter based preconditioner for the conjugate gradient method is proposed to speed up the convergence. The circulant-block structure of the preconditioner allows efficient implementation using Fast Fourier Transform. Effectiveness of the preconditioner is demonstrated by superresolution results for simulated image sequences.

Citation Download Citation

Changjiang Yang, Ramani Duraiswami, and Larry S. Davis "Super-resolution using preconditioned conjugate gradient method", Proc. SPIE 4875, Second International Conference on Image and Graphics, (31 July 2002); https://doi.org/10.1117/12.477201

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