A rapid and automatic MRF-Based clustering method for SAR images

作者：Xia Gui Song^*; He Chu; Sun Hong

来源：IEEE Geoscience and Remote Sensing Letters, 2007, 4(4): 596-600.

DOI：10.1109/LGRS.2007.903065

• graph cuts (GCs)
• image clustering
• Markov random field (MRF) model
• synthetic aperture radar (SAR)

This letter presents a precise and rapid clustering method for synthetic aperture radar (SAR) images by embedding a Markov random field (MRF) model in the clustering space and using graph cuts (GCs) to search the optimal clusters for the data. The proposed method is optimal in the sense of maximum a posteriori (MAP). It automatically works in a two-loop way: an outer loop and an inner loop. The outer loop determines the cluster number using a pseudolikelihood information criterion based on MRF modeling, and the inner loop is designed in a "hard" membership expectation-maximization (EM) style: in the E step, with fixed parameters, the optimal data clusters are rapidly searched under the criterion of MAP by the GC; and in the M step, the parameters are estimated using current data clusters as "hard" membership obtained in the E step. The two steps are iterated until the inner loop converges. Experiments on both simulated and real SAR images test the performance of the algorithm.

• 出版日期2007-10
• 单位武汉大学