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Optical Engineering

Multi-Parseval frame-based nonconvex sparse image deconvolution
Author(s): Wen-Ze Shao; Hai-Song Deng; Zhi-Hui Wei
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Paper Abstract

Image deconvolution is an ill-posed, low-level vision task, restoring a clear image from the blurred and noisy observation. From the perspective of statistics, previous work on image deconvolution has been formulated as a maximum a posteriori or a general Bayesian inference problem, with Gaussian or heavy-tailed non-Gaussian prior image models (e.g., a student's t distribution). We propose a Parseval frame-based nonconvex image deconvolution strategy via penalizing the l0-norm of the coefficients of multiple different Parseval frames. With these frames, flexible filtering operators are provided to adaptively capture the point singularities, the curvilinear edges and the oscillating textures in natural images. The proposed optimization problem is implemented by borrowing the idea of recent penalty decomposition method, resulting in a simple and efficient iteration algorithm. Experimental results show that the proposed deconvolution scheme is highly competitive among state-of-the-art methods, in both the improvement of signal-to-noise ratio and visual perception.

Paper Details

Date Published: 6 June 2012
PDF: 13 pages
Opt. Eng. 51(6) 067008 doi: 10.1117/1.OE.51.6.067008
Published in: Optical Engineering Volume 51, Issue 6
Show Author Affiliations
Wen-Ze Shao, Nanjing Univ. of Posts and Telecommunications (China)
Hai-Song Deng, Nanjing Audit Univ. (China)
Zhi-Hui Wei, Nanjing Univ. of Science & Technology (China)


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