ICTACT Journal on Image and Video Processing

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Detail Preserved Denoising Algorithm Via Patch Based Edge Similarity Index And Joint Bilateral Filter


Affiliations
1 Department of Department of Agricultural Statistics, Kerala Agricultural University, India
     

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Denoising algorithms are getting more attention in these days because they play a vital role in other applications of image processing. As details structures are the important information of Human Visual System, its preservation in denoised image is highly demanding one. A two-step denoising algorithm based on Patch based Edge Similarity Index and Joint Bilateral Filter algorithm proposed in this paper, preserves the edge structures and produce visually pleasant denoised image. Edge Similarity Index (ESI) proposed in the paper group patches according to their similarity in orientation and hence preserve the detail feature. The optimally grouped patches transferred to Principal Component Analysis (PCA) domain and the proposed noise suppression method eliminates the noisy component. Adaptive soft thresholding noise suppression method suppress the noise based on local noise estimation. Noise estimation in local level helps to estimate the noise accurately where noise affected differently in regions of a scene. Strong noises residuals may exist after first step, the denoised image in the first step further processed by a Joint Bilateral Filter for producing visually pleasant denoised image. Experimental results shown that proposed denoising algorithm achieves comparable detail preserving performance in terms of visual analysis and quantitative analysis over other state of art method.

Keywords

Fixed Patch, Variable Patch, Denoising Patch, Edge Similarity Index, Joint Bilateral Filter
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  • Detail Preserved Denoising Algorithm Via Patch Based Edge Similarity Index And Joint Bilateral Filter

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Authors

Dayana David
Department of Department of Agricultural Statistics, Kerala Agricultural University, India

Abstract


Denoising algorithms are getting more attention in these days because they play a vital role in other applications of image processing. As details structures are the important information of Human Visual System, its preservation in denoised image is highly demanding one. A two-step denoising algorithm based on Patch based Edge Similarity Index and Joint Bilateral Filter algorithm proposed in this paper, preserves the edge structures and produce visually pleasant denoised image. Edge Similarity Index (ESI) proposed in the paper group patches according to their similarity in orientation and hence preserve the detail feature. The optimally grouped patches transferred to Principal Component Analysis (PCA) domain and the proposed noise suppression method eliminates the noisy component. Adaptive soft thresholding noise suppression method suppress the noise based on local noise estimation. Noise estimation in local level helps to estimate the noise accurately where noise affected differently in regions of a scene. Strong noises residuals may exist after first step, the denoised image in the first step further processed by a Joint Bilateral Filter for producing visually pleasant denoised image. Experimental results shown that proposed denoising algorithm achieves comparable detail preserving performance in terms of visual analysis and quantitative analysis over other state of art method.

Keywords


Fixed Patch, Variable Patch, Denoising Patch, Edge Similarity Index, Joint Bilateral Filter

References