Technology of Graphic & Image
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1545-1548,1552

Wavelet transform image denoising algorithm based on improved threshold function

Zhang Huijuan
Zhang Damin
Yan Wei
Chen Zhongyun
Xin Ziyun
College of Big Data & Information Engineering, Guizhou University, Guiyang 550025, China

Abstract

Aiming at the discontinuity of the traditional hard threshold function at the threshold and the constant deviation between the original wavelet coefficient and the wavelet estimation coefficient in the soft threshold function, this paper proposed an image denoising algorithm based on the improved threshold function. This algorithm combined the advantages of the improved threshold function, dynamically selected the fixed threshold by setting appropriate adjustment parameters, and added the adjustment factors to reduce the constant deviation between the original wavelet coefficient and the estimated wavelet coefficient, thereby improving the degree of approximation of the reconstructed image and the original image. The improved threshold function satisfied continuity at the threshold while satisfying the asymptotic and higher order conductibility of the function. Simulation results show that the visual effect is good, while using the improved threshold function for image denoising. In comparison, both PSNR and SNR are improved, MSE is reduced, and the denoising effect is optimized.

Foundation Support

贵州省自然科学基金资助项目(黔科合基础[2017]1047号)

Publish Information

DOI: 10.19734/j.issn.1001-3695.2018.10.0844
Publish at: Application Research of Computers Printed Article, Vol. 37, 2020 No. 5
Section: Technology of Graphic & Image
Pages: 1545-1548,1552
Serial Number: 1001-3695(2020)05-054-1545-04

Publish History

[2020-05-05] Printed Article

Cite This Article

张绘娟, 张达敏, 闫威, 等. 基于改进阈值函数的小波变换图像去噪算法 [J]. 计算机应用研究, 2020, 37 (5): 1545-1548,1552. (Zhang Huijuan, Zhang Damin, Yan Wei, et al. Wavelet transform image denoising algorithm based on improved threshold function [J]. Application Research of Computers, 2020, 37 (5): 1545-1548,1552. )

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  • Application Research of Computers Monthly Journal
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Application Research of Computers, founded in 1984, is an academic journal of computing technology sponsored by Sichuan Institute of Computer Sciences under the Science and Technology Department of Sichuan Province.

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