期刊
SIAM JOURNAL ON IMAGING SCIENCES
卷 6, 期 1, 页码 368-390出版社
SIAM PUBLICATIONS
DOI: 10.1137/120867068
关键词
image segmentation; Mumford-Shah model; split-Bregman; total variation
类别
资金
- RGC [400412]
- DAG [2060408]
- NSFC [11271049, RGC 211710, RGC 211911]
- RFGs of HKBU
The Mumford-Shah model is one of the most important image segmentation models and has been studied extensively in the last twenty years. In this paper, we propose a two-stage segmentation method based on the Mumford-Shah model. The first stage of our method is to find a smooth solution g to a convex variant of the Mumford-Shah model. Once g is obtained, then in the second stage the segmentation is done by thresholding g into different phases. The thresholds can be given by the users or can be obtained automatically using any clustering methods. Because of the convexity of the model, g can be solved efficiently by techniques like the split-Bregman algorithm or the Chambolle-Pock method. We prove that our method is convergent and that the solution g is always unique. In our method, there is no need to specify the number of segments K (K = 2) before finding g. We can obtain any K-phase segmentations by choosing (K-1) thresholds after g is found in the first stage, and in the second stage there is no need to recompute g if the thresholds are changed to reveal different segmentation features in the image. Experimental results show that our two-stage method performs better than many standard two-phase or multiphase segmentation methods for very general images, including antimass, tubular, MRI, noisy, and blurry images.
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