Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/55470
Title: A Circular Adaptive Median Filter for Salt and Pepper Noise Suppression from MRI Images
Authors: Sagar, Priya
Upadhyaya, Ashruti
Mishra, Sudhansu Kumar
Pandey, Rudra Narayan
Sahu, Sitanshu Sekhar
Panda, Ganapati
Keywords: Adaptive filter;Median filter;MRI;PSNR;Statistical analysis
Issue Date: Oct-2020
Publisher: NISCAIR-CSIR, India
Abstract: An adaptive median filter with a circular kernel, named as circular adaptive median filter (CAMF) is proposed in this article, for denoising of magnetic resonance imaging (MRI) images corrupted by salt and pepper noise of varying noise densities. An adaptive operation is incorporated in the proposed filter by varying the size of the circular kernel according to the requirement. The effectiveness of the CAMF is compared with six other competitive networks, i.e., conic adaptive median filter (CoAMF), decision based filter (DBF), modified switching median filter (MSWM), recursive adaptive modified filter (RAMF), plus adaptive median filter (PAMF), and cross adaptive median filter (CrAMF). The performance of all the models is analyzed using peak signal to noise ratio (PSNR) and computational time. Moreover, a non-parametric statistical test is conducted to illustrate the pair wise comparison of other filter with the proposed one. It is observed that the proposed approach has demonstrated superior performance with respect to the two performance measures.
Page(s): 941-944
URI: http://nopr.niscair.res.in/handle/123456789/55470
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.79(10) [October 2020]

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