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01-01-2019 | Image & Signal Processing

Hybrid Filtering Approach for Retrieval of MRI Image

Authors: K. Murugan, V. P. Arunachalam, S. Karthik

Published in: Journal of Medical Systems | Issue 1/2019

Abstract

The quality of Magnetic Resonance Images(MRI) are degraded by the various types of noises. In this paper, a Hybrid Multi-resolution filter for denoising the MRI images degraded by the Salt and Pepper noise is proposed and the wavelet transform is used to improve the resolution of the denoised image.. The Hybrid filter consist of three value weighted filter and similarity based filter. In three value weighted filter, a variable local window is applied to find the noisy pixels. By using the noise free pixels in that window, the noisy pixels are reconstructed using three value method. In similarity based filter, a variable local window is applied to reconstruct the noisy pixels. In that window, based on the similarity between the noisy pixel sequence and noise free pixels sequence are used to reconstruct the noisy pixel. At last wavelet transform is used to increase the resolution of the reconstructed image. The experimental results shows that the proposed filter denoises the image and improves the resolution when compared to the existing methods and produces the efficiency of about 98%.

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Title: Hybrid Filtering Approach for Retrieval of MRI Image
Authors: K. Murugan
V. P. Arunachalam
S. Karthik
Publication date: 01-01-2019
Publisher: Springer US
Published in: Journal of Medical Systems / Issue 1/2019
Print ISSN: 0148-5598
Electronic ISSN: 1573-689X
DOI: https://doi.org/10.1007/s10916-018-1124-1

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