Image denoising assessment using anisotropic stack filtering

Details Image denoising assessment using anisotropic stack filtering Image denoising assessment using anisotropic stack filtering

2011-06-29

arxiv.org/abs/1106.5928v1

Computer Science

Computer Vision and Pattern Recognition

13 pages, 8 figures

Scientific paper

In this paper we propose a measure of anisotropy as a quality parameter to estimate the amount of noise in noisy images. The anisotropy of an image can be determined through a directional measure, using an appropriate statistical distribution of the information contained in the image. This new measure is achieved through a stack filtering paradigm. First, we define a local directional entropy, based on the distribution of 0's and 1's in the neigborhood of every pixel location of each stack level. Then the entropy variation of this directional entropy is used to define an anisotropic measure. The empirical results have shown that this measure can be regarded as an excellent image noise indicator, which is particularly relevant for quality assessment of denoising algorithms. The method has been evaluated with artificial and real-world degraded images.

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