Image denoising using contourlet transform with variable block thresholding

Salman, T, Al-Azawi, M and Al-jobouri, Laith (2018) Image denoising using contourlet transform with variable block thresholding. In: 10th Computer Science and Electronic Engineering Conference, 19-21 Sep 2018, Colchester, UK. (Unpublished)

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Official URL: https://ceec.uk/

Abstract

Denoising is one of the main issues in digital image processing systems. This paper presents a new idea to improve the Peak Signal to Noise Ratio (PSNR) of the denoised image by dividing the image into many blocks then a variable threshold is set according to the energy content of a particular block in the frequency domain obtained using the Contourlet Transform (CT). Computer simulation results show that the proposed method is very efficient to denoise Magnetic Resonance Imaging (MRI) pictures and outperforms the traditional denoising methods that deal with the image as a whole. Experimental evaluation showed that the variable block threshold is more efficient when applied at MRI than other type of images, due to the low energy of the surrounding areas in the MRI.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Blocking, Block thresholding, Contourlet, MRI images and Standard Deviation of Blocks
Subjects: Q Science > Q Science (General)
T Technology > T Technology (General)
Divisions: Faculty of Health & Science > Department of Science & Technology
Depositing User: David Upson-Dale
Date Deposited: 22 Aug 2018 11:29
Last Modified: 22 Aug 2018 11:29
URI: http://oars.uos.ac.uk/id/eprint/704

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