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• W2023005931 abstract "Noise level is an important parameter to many image processing applications. For example, the performance of an image denoising algorithm can be much degraded due to the poor noise level estimation. Most existing denoising algorithms simply assume the noise level is known that largely prevents them from practical use. Moreover, even with the given true noise level, these denoising algorithms still cannot achieve the best performance, especially for scenes with rich texture. In this paper, we propose a patch-based noise level estimation algorithm and suggest that the noise level parameter should be tuned according to the scene complexity. Our approach includes the process of selecting low-rank patches without high frequency components from a single noisy image. The selection is based on the gradients of the patches and their statistics. Then, the noise level is estimated from the selected patches using principal component analysis. Because the true noise level does not always provide the best performance for nonblind denoising algorithms, we further tune the noise level parameter for nonblind denoising. Experiments demonstrate that both the accuracy and stability are superior to the state of the art noise level estimation algorithm for various scenes and noise levels." @default.
• W2023005931 created "2016-06-24" @default.
• W2023005931 creator A5024453747 @default.
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• W2023005931 date "2013-12-01" @default.
• W2023005931 modified "2023-10-17" @default.
• W2023005931 title "Single-Image Noise Level Estimation for Blind Denoising" @default.
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• W2023005931 doi "https://doi.org/10.1109/tip.2013.2283400" @default.
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