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19 September 2019 Poisson image deconvolution by promoting hyper-Laplacian prior with generalized lp/lq regularization
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Abstract

Poisson image deconvolution and denoising have received much attention in recent years. A key challenge of this problem is that the most effective prior might never exist. The purpose of our study is to investigate the characteristics of generalized lp  /  lq norm on the derivatives of nature images and to present an efficient method to promote hyper-Laplacian prior for the deconvolution of blurry and Poisson noisy images. We first analyze the mathematical characteristics of generalized lp  /  lq norm based on the Berkeley segmentation data set and implement deconvolution using generalized lp  /  lq norm for derivatives in high-frequency domain so as to enforce the preservation of strong edges. Then hyper-Laplacian prior is promoted for actual Poisson image deconvolution, which uses the estimated gradient information to penalize the small derivatives (often noise) and preserve large derivatives associated to image borders. Our preliminary experiments show that the proposed method can achieve higher image quality than state-of-the-art methods in terms of peak signal-to-noise ratio and noise sensitivity.

© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2019/$28.00 © 2019 SPIE
Lei Chen, Quansen Sun, and Fanhai Wang "Poisson image deconvolution by promoting hyper-Laplacian prior with generalized lp/lq regularization," Optical Engineering 58(9), 093104 (19 September 2019). https://doi.org/10.1117/1.OE.58.9.093104
Received: 17 June 2019; Accepted: 4 September 2019; Published: 19 September 2019
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