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Noise Level Estimation for Natural Images Based on Scale-Invariant Kurtosis and Piecewise Stationarity

Published: 01 February 2017 Publication History

Abstract

Noise level estimation is crucial in many image processing applications, such as blind image denoising. In this paper, we propose a novel noise level estimation approach for natural images by jointly exploiting the piecewise stationarity and a regular property of the kurtosis in bandpass domains. We design a $K$ -means-based algorithm to adaptively partition an image into a series of non-overlapping regions, each of whose clean versions is assumed to be associated with a constant, but unknown kurtosis throughout scales. The noise level estimation is then cast into a problem to optimally fit this new kurtosis model. In addition, we develop a rectification scheme to further reduce the estimation bias through noise injection mechanism. Extensive experimental results show that our method can reliably estimate the noise level for a variety of noise types, and outperforms some state-of-the-art techniques, especially for non-Gaussian noises.

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cover image IEEE Transactions on Image Processing
IEEE Transactions on Image Processing  Volume 26, Issue 2
February 2017
545 pages

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IEEE Press

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Published: 01 February 2017

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  • (2021)Optimal Pre-Filtering for Improving Facebook Shared ImagesIEEE Transactions on Image Processing10.1109/TIP.2021.309379430(6292-6306)Online publication date: 1-Jan-2021
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  • (2020)Additive White Gaussian Noise Level Estimation for Natural Images Using Linear Scale-Space FeaturesCircuits, Systems, and Signal Processing10.1007/s00034-020-01475-x40:1(353-374)Online publication date: 22-Jun-2020
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