Fast Poissonian image segmentation with a spatially adaptive kernel |
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Authors: | Dai-Qiang Chen Li-Zhi Cheng Xin-Peng Du |
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Institution: | 1. Department of Mathematics, School of Biomedical Engineering, Third Military Medical University, Chongqing, Chongqing 400038, People''s Republic of China;2. Department of Mathematics and System, School of Science, National University of Defense Technology, Changsha, Hunan 410073, People''s Republic of China |
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Abstract: | The variational models with the goal of minimizing the local variation are widely used for the segmentation of the intensity inhomogeneous images recently. Local variation is a good measure for the images corrupted by Gaussian noise. However, in many applications such as astronomical imaging, electronic microscopy and positron emission tomography, Poisson noise often occurs in the observed images. To deal with this kind of images, we develop a novel segmentation model based on minimizing local generalized Kullback–Leibler (KL) divergence with a spatially adaptive kernel. A fast algorithm based on the split-Bregman method is proposed to solve the corresponding optimization problem. Numerical experiments for synthetic and real images demonstrate that the proposed model outperforms most of the current state-of-the-art methods in the present of Poisson noise. |
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Keywords: | Image segmentation Poisson noise Generalized Kullback&ndash Leibler divergence Spatially adaptive kernel Split-Bregman method |
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