Removing Random-Valued Impulse Noises by a Two-Staged Nonlinear Filtering Method

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	Removing Random-Valued Impulse Noises by a Two-Staged Nonlinear Filtering Method
	Ahmad Ashfaq1,2,3 ; Lu Yanting1,2
	2016-06
发表期刊	Transactions of Nanjing University of Aeronautics and Astronautics
卷号	33 期号:3 页码:329-338
摘要	Digital images are frequently contaminated by impulse noise（IN）during acquisition and transmission。 The removal of this noise from images is essential for their further processing。In this paper，a two-staged nonlinear filtering algorithm is proposed for removing random-valued impulse noise（RVIN）from digital images。 Noisy pixels are identified and corrected in two cascaded stages。The statistics of two subsets of nearest neighbors are employed as the criterion for detecting noisy pixels in the first stage，while directional differences are adopted as the detector criterion in the second stage。 The respective adaptive median values are taken as the replacement values for noisy pixels in each stage。 The performance of the proposed method was compared with that of several exsisting methods。 The experimental results show that the performance of the suggested algorithm is superior to those of the compared methods in terms of noise removal，edge preservation，and processing time。
关键词	Image De-noising Random-valued Impulse Noise Nonlinear Filter Noisy Pixel Detection Two-stage Detection And Correction Method Directional Differences
学科领域	天文技术与方法
语种	英语
文献类型	期刊论文
条目标识符	http://ir.niaot.ac.cn/handle/114a32/1355
专题	期刊论文
作者单位	1.南京天文光学技术研究所 2.中国科学院天文光学重点实验室 3.中国科学院大学
推荐引用方式 GB/T 7714	Ahmad Ashfaq,Lu Yanting. Removing Random-Valued Impulse Noises by a Two-Staged Nonlinear Filtering Method[J]. Transactions of Nanjing University of Aeronautics and Astronautics,2016,33(3):329-338.
APA	Ahmad Ashfaq,&Lu Yanting.(2016).Removing Random-Valued Impulse Noises by a Two-Staged Nonlinear Filtering Method.Transactions of Nanjing University of Aeronautics and Astronautics,33(3),329-338.
MLA	Ahmad Ashfaq,et al."Removing Random-Valued Impulse Noises by a Two-Staged Nonlinear Filtering Method".Transactions of Nanjing University of Aeronautics and Astronautics 33.3(2016):329-338.

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