| 基于贪心EM算法的HMRF遥感影像变化检测 |
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| 引用本文： | 牛鹏辉,李卫华,李小春. 基于贪心EM算法的HMRF遥感影像变化检测[J]. 光电工程, 2011, 38(11): 50-56. DOI: 10.3969/j.issn.1003-501X.2011.11.010 |
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| 作者姓名： | 牛鹏辉 李卫华 李小春 |
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| 作者单位： | 空军工程大学电讯工程学院,西安,710077 |
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| 基金项目： | 自动化部队科学研究项目(2S100402); 陕西省自然科学基金资助项目(2010HM8038) |
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| 摘 要： | 提出一种基于贪心EM算法的HMRF遥感影像变化检测算法.该算法采取PCA与差值法相结合的方式来构造差分影像.首先,采用隐马尔可夫随机场( Hidden Markov Random Field,HMRF)模型描述空间上下文信息,并构造系统能量函数；然后,利用贪心EM算法克服EM算法假定混合成分数为已知、迭代结果过分依赖初...
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| 关 键 词： | 变化检测 隐马尔可夫随机场模型 贪心EM算法 |
Remote Sensing Image Change Detection Based on Greedy EM Algorithm for HMRF |
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| NIU Peng-hui,LI Wei-hua,LI Xiao-chun. Remote Sensing Image Change Detection Based on Greedy EM Algorithm for HMRF[J]. Opto-Electronic Engineering, 2011, 38(11): 50-56. DOI: 10.3969/j.issn.1003-501X.2011.11.010 |
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| Authors: | NIU Peng-hui LI Wei-hua LI Xiao-chun |
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| Abstract: | A remote sensing image change detection approach based on greedy Expectation Maximization (EM) algorithm for Hidden Markov Random Field (HMRF) is proposed. The difference image is constructed by Principal Component Analysis (PCA) and subtraction operation. Firstly, the HMRF model is applied to characterize the contexture-dependent information, and the energy function of system is defined. Secondly, the greedy EM algorithm is used to overcome the disadvantage of the standard EM algorithm that assumed the num... |
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| Keywords: | change detection hidden Markov random field greedy EM algorithm |
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