ALOS SAR图像2EM-MRF方法自动检测2008年5月中国汶川地震区域三类地表变化
摘要
用2008年5月12日四川汶川地震前后的星载ALOS合成孔径雷达(synthetic aperture radar,SAR)图像,提出双阈值极大期望与Markov随机场方法(two thresholds expectation maxi-mum and Markov random field,2EM-MRF),以北川县地区为例,自动检测这次地震导致地表变化而产生散射增强、减弱、不变的3类特征区域,作为地震区域地表变化的自动划分归类.借助GoogleEarth地形图工具,可即时多视角动画地展示地震产生的地表变化区域状况.识别结果也与可见光照片作了对照与分析.研究表明,建立高分辨率全极化SAR多源与多时相遥感与对地观测是全天候监测自然灾害的有效手段,本方法可有进一步的延伸.
引文
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2Moon TK.The expectation-maxi mization algorithm.Signal Pro-cessing Magazine,1996,13(6):47—60
3Rignot E,van Zyl J.Change detection techniques for ERS-1SAR data.IEEE Transactions on Geoscence and Remote Sens-ing,1993,31(4):896—906
4Singh A.Digtial change detection techniques using remotely-sensed data.International Journal of Remote Sensing,1989,10(6):989—1003
5Ghiglia DC,Romero LA.Robust two-di mensional weighted and unweighted phase unwrapping that uses fast transforms anditer-ative methods.Journal of Optical Society of American A,1994,11(1):107—117
6Takajo H,Takahashi T.Least-squares phase esti mation from phase difference.Journal of Optical Society of American(A),1998,5:416—425
7Bruzzone L,Prieto DF.Automatic analysis of the difference i m-age for unsupervised change cetection.IEEE Transactions on Ge-oscience and Remote Sensing,2000,38(3):1171—1182
8Render AP,Walker HF.Mixture densities,maxi mumlikelihood and the EMalgorithm.SI AM Review,1984,26(2):195—239
9Kasetkasem T,Varshney P.An i mage change detection algo-rithmbased on Markov randomfield model.IEEE Transactions on Geoscience and Remote Sensing,2002,40(8):1815—1823
10Merril KR,Jiajun L.Acomparison of four algorithms for change detectionin an urban environment.Remote Sensing of Environ-ment,1998,63:95—100
11Besag J.Spatial interaction and the statistical analysis of lattice systems(with discussion).Journal of Royal Statistics Society,Series B,1994,36(2):192—326
12Besag J.On the statistic analysis of dirty pictures.Journal of Royal Statistics Society,Series B,1986,48:259—302
13Zhang J,James WM,David AL.Maxi mum-likelihood parameter esti mation for unsupervised stochastic model based oni mage seg-mentation.IEEE Transactions on I mage Processing,1994,3(4):404—420
14Cloude SR,Pottier E.A review of target decomposition theo-rems in radar polari metry.IEEE Transactions on Geoscience and Remote Sensing,1996,34(2):498—518
15Xu F,Jin YQ.Deorientation theory of polari metric scattering targets and application to terrain surface classification.IEEE Transactions on Geoscience and Remote Sensing,2005,43(10):2351—2364
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