Title: Noise reducing performance of anisotropic diffusion filter and circular median filter in digital images

Authors: Neha Mehta; S.V.A.V. Prasad; Leena Arya

Addresses: Lingaya's Vidyapeeth, Nachauli, Jasana Road, Old Faridabad, Faridabad, Haryana 121002, India ' Lingaya's Vidyapeeth, Nachauli, Jasana Road, Old Faridabad, Faridabad, Haryana 121002, India ' Electronics and Communication Department, ITS Engineering College, Greater Noida, U.P., India

Abstract: The speckle noise is one of the prominent features found in ultrasound images and it tends to degrade the quality of the image. There is a historic success in the works towards this approach particularly in the medical field related to image de-speckling. In this paper, a scale-space nonlinear anisotropic diffusion process and circular median filter is being combined with un-sharp masking to filter out the speckle noise from the ultrasound images. However, the performance evaluation and the comparison of both the filters are being done at each level of the process by comparing the various parameters of image quality measures. The nonlinear anisotropic diffusion filter has found to be performing better by two decimal point values in comparison to the circular median filter.

Keywords: speckle noise; ultrasound images; de-speckling; scale-space nonlinear anisotropic diffusion process; circular median filter; circular median filter; CMF; un-sharp masking; image quality measures.

DOI: 10.1504/IJDSSS.2020.106081

International Journal of Digital Signals and Smart Systems, 2020 Vol.4 No.1/2/3, pp.171 - 183

Received: 21 May 2019
Accepted: 14 Jun 2019
Published online: 27 Mar 2020 *