Effective image restorations using a novel spatial adaptive prior

  • Authors:

  • Yang Chen;Yinsheng Li;Yingmei Dong;Liwei Hao;Limin Luo;Wufan Chen

  • Affiliations:

  • The Laboratory of Image Science and Technology, Southeast University, Nanjing, China and The School of Biomedical Engineering, Southern Medical University, Guangzhou, China;The Laboratory of Image Science and Technology, Southeast University, Nanjing, China and The School of Biomedical Engineering, Southern Medical University, Guangzhou, China;Cadre Reset Institute, The Joint Logistics Department, Chengdu Military Region, Chengdu, China;The School of Biomedical Engineering, Southern Medical University, Guangzhou, China;The Laboratory of Image Science and Technology, Southeast University, Nanjing, China;The School of Biomedical Engineering, Southern Medical University, Guangzhou, China

  • Venue:
  • EURASIP Journal on Advances in Signal Processing
  • Year:
  • 2010

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Abstract

Bayesian or Maximum a posteriori (MAP) approaches can effectively overcome the ill-posed problems of image restoration or deconvolution through incorporating a priori image information. Many restoration methods, such as nonquadratic prior Bayesian restoration and total variation regularization, have been proposed with edge-preserving and noise-removing properties. However, these methods are often inefficient in restoring continuous variation region and suppressing block artifacts. To handle this, this paper proposes a Bayesian restoration approach with a novel spatial adaptive (SA) prior. Through selectively and adaptively incorporating the nonlocal image information into the SA prior model, the proposed method effectively suppress the negative disturbance from irrelevant neighbor pixels, and utilizes the positive regularization from the relevant ones. A twostep restoration algorithm for the proposed approach is also given. Comparative experimentation and analysis demonstrate that, bearing high-quality edge-preserving and noise-removing properties, the proposed restoration also has good deblocking property.