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Code: LOW-FREQUENCY IMAGE NOISE REMOVAL USING WHITE NOISE FILTER

Abstract: 

Image noise filters usually assume noise as white Gaussian. However, in a capturing pipeline, noise often becomes spatially correlated due to in-camera processing that aims to suppress the noise and increase the compression rate. Mostly, only high-frequency noise components are suppressed since the image signal is more likely to appear in the low-frequency components of the captured image. As a result, noise emerges as coarse grain which makes white (all-pass) noise filters ineffective, especially when the resolution of the target display is lower than the captured image. Denoising of image approximation in coarse scale has the advantage of removing low-frequency noise, however, lack of spatial resolution degrades the image quality. This paper presents an approach for a coarse-grain removal. Our approach utilizes existing white Gaussian noise filters to address low-frequency component of spatially correlated noises, employing pixel decoupling, local shrinkage, and soft thresholding. Subjective and objective results show that the proposed approach better handles low-frequency noise compared to related work.

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Paper Details

Authors:
Meisam Rakhshanfar and Maria A. Amer
Submitted On:
10 October 2018 - 6:38pm
Short Link:
Type:
Source code
Event:
Paper Code:
WQ.P3.7
Document Year:
2018
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Document Files

Source code; see also https://users.encs.concordia.ca/~amer/LFNFilter/

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[1] Meisam Rakhshanfar and Maria A. Amer, "Code: LOW-FREQUENCY IMAGE NOISE REMOVAL USING WHITE NOISE FILTER", IEEE SigPort, 2018. [Online]. Available: http://sigport.org/3659. Accessed: Oct. 19, 2018.
@article{3659-18,
url = {http://sigport.org/3659},
author = {Meisam Rakhshanfar and Maria A. Amer },
publisher = {IEEE SigPort},
title = {Code: LOW-FREQUENCY IMAGE NOISE REMOVAL USING WHITE NOISE FILTER},
year = {2018} }
TY - EJOUR
T1 - Code: LOW-FREQUENCY IMAGE NOISE REMOVAL USING WHITE NOISE FILTER
AU - Meisam Rakhshanfar and Maria A. Amer
PY - 2018
PB - IEEE SigPort
UR - http://sigport.org/3659
ER -
Meisam Rakhshanfar and Maria A. Amer. (2018). Code: LOW-FREQUENCY IMAGE NOISE REMOVAL USING WHITE NOISE FILTER. IEEE SigPort. http://sigport.org/3659
Meisam Rakhshanfar and Maria A. Amer, 2018. Code: LOW-FREQUENCY IMAGE NOISE REMOVAL USING WHITE NOISE FILTER. Available at: http://sigport.org/3659.
Meisam Rakhshanfar and Maria A. Amer. (2018). "Code: LOW-FREQUENCY IMAGE NOISE REMOVAL USING WHITE NOISE FILTER." Web.
1. Meisam Rakhshanfar and Maria A. Amer. Code: LOW-FREQUENCY IMAGE NOISE REMOVAL USING WHITE NOISE FILTER [Internet]. IEEE SigPort; 2018. Available from : http://sigport.org/3659