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An Anisotropic Convection-Diffusion Model Using Tailored Finite Point Method for Image Denoising and Compression

Published online by Cambridge University Press:  17 May 2016

Yu-Tuan Lin*
Affiliation:
Department of Applied Mathematics, National Chung Hsing University, Taichung 40227, TaiwanInstitute of Mathematics, Academia Sinica, Taiwan
Yin-Tzer Shih*
Affiliation:
Department of Applied Mathematics, National Chung Hsing University, Taichung 40227, Taiwan
Chih-Ching Tsai*
Affiliation:
Department of Applied Mathematics, National Chung Hsing University, Taichung 40227, Taiwan
*
*Corresponding author. Email addresses:ytlin@math.sinica.edu.tw (Y.-T. Lin), yintzer_shih@nchu.edu.tw (Y.-T. Shih), jet.tsai98004@gmail.com (C.-C. Tsai)
*Corresponding author. Email addresses:ytlin@math.sinica.edu.tw (Y.-T. Lin), yintzer_shih@nchu.edu.tw (Y.-T. Shih), jet.tsai98004@gmail.com (C.-C. Tsai)
*Corresponding author. Email addresses:ytlin@math.sinica.edu.tw (Y.-T. Lin), yintzer_shih@nchu.edu.tw (Y.-T. Shih), jet.tsai98004@gmail.com (C.-C. Tsai)

Abstract

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In this paper we consider an anisotropic convection-diffusion (ACD) filter for image denoising and compression simultaneously. The ACD filter is discretized by a tailored finite point method (TFPM), which can tailor some particular properties of the image in an irregular grid structure. A quadtree structure is implemented for the storage in multi-levels for the compression. We compare the performance of the proposed scheme with several well-known filters. The numerical results show that the proposed method is effective for removing a mixture of white Gaussian and salt-and-pepper noises.

Information

Type
Research Article
Copyright
Copyright © Global-Science Press 2016