地震损毁建筑物的高分辨率SAR图像模拟与分析
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摘要
为了分析汶川地震震后高分辨率合成孔径(SAR)图像的城区建筑物特征,基于实际获取的机载X波段SAR图像,采用电磁模拟方法进行分析和研究。通过对城区的完整建筑和毁损建筑进行三维建模,采用射线跟踪的电磁计算方法和图像域积分的成像模拟方法得到不同受灾程度的建筑物SAR模拟图像。与真实SAR图像对比分析,提出的算法能够分析建筑物结构变化对SAR图像的影响,模拟主要的强散射点,能有效辅助SAR图像进行城区特征分析。
Based on the airborne X band SAR images,the electromagnetic method was used to analyze the characteristics of the buildings after Wenchuan earthquake in the urban district of high resolution Synthesize Aperture Radar(SAR)images.After the undamaged buildings and damaged building were constructed by 3D models,the ray-tracing electromagnetic method and Image-Domain-Integration imaging simulation method were used to simulate SAR images of buildings with different damage degrees.Comparing with the real SAR image,the algorithm presented in this paper can analyze the backscatter change due to building structure,simulate the main scattering points,and effectively assist the analysis of the urban district SAR image characteristics.
Based on the airborne X band SAR images,the electromagnetic method was used to analyze the characteristics of the buildings after Wenchuan earthquake in the urban district of high resolution Synthesize Aperture Radar(SAR)images.After the undamaged buildings and damaged building were constructed by 3D models,the ray-tracing electromagnetic method and Image-Domain-Integration imaging simulation method were used to simulate SAR images of buildings with different damage degrees.Comparing with the real SAR image,the algorithm presented in this paper can analyze the backscatter change due to building structure,simulate the main scattering points,and effectively assist the analysis of the urban district SAR image characteristics.
引文
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Franceschetti G,Iodice A,Riccio D,Ruello G.2003.SAR raw signalsimulation for urban structures.IEEE Transactions on Geoscienceand Remote Sensing,41(9PART I):1986—1995
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Hazlett M,Andersh D J,Lee S W,et al.1995.XPATCH:a high-frequency electromagnetic scattering prediction code using shootingand bouncing rays.Proceedings of SPIE:The International Society for Optical Engineering
Ling H,Chou R C,Lee S W.1989.Shooting and bouncing rays:calculating the RCS of an arbitrarily shaped cavity.IEEETransactions on Antennas and Propagation,37(2):194—205
Margarit G,Mallorqui J J,Lopez-Martinez C.2008.GRECOSAR,aSAR simulator for complex targets:Application to urbanenvironments.International Geoscience and Remote SensingSymposium(IGARSS)
Margarit G,Mallorqui J J,Rius J M,et al.2006.On the usage ofGRECOSAR,an orbital polarimetric SAR simulator of complextargets,to vessel classification studies.IEEE Transactions onGeoscience and Remote Sensing,44(12):3517—3525
Wu T,Wang C,Zhang H.2007.Space-borne SAR image simulationbased on image characteristics.Journal of Remote Sensing,11(2):214—220
Xu F,Jin Y Q.2006.Imaging simulation of polarimetric SAR for acomprehensive terrain scene using the mapping and projectionalgorithm.Progress in Natural Science,16(11):1459—1471
吴涛,王超,张红.2007.基于图像特征的星载SAR图像模拟研究.遥感学报,11(2):214—220
徐丰,金亚秋.2006.基于映射投影(MPA)的复杂地面场景极化SAR成像模拟.自然科学进展,16(11)1459—1471
Balz T,Haala N.2006.Improved real-time SAR simulation in Urbanareas.International Geoscience and Remote Sensing Symposium(IGARSS)
Bhalla R,Ling H.1995.Fast algorithm for signature prediction andimage formation using the shooting and bouncing ray technique.IEEE Transactions on Antennas and Propagation,43(7):727—731
Franceschetti G,Iodice A,Riccio D.2002.A canonical problem inelectromagnetic backscattering from buildings.IEEE Transactionson Geoscience and Remote Sensing,40(8):1787—1801
Franceschetti G,Iodice A,Riccio D,Ruello G.2003.SAR raw signalsimulation for urban structures.IEEE Transactions on Geoscienceand Remote Sensing,41(9PART I):1986—1995
Franceschetti G,Migliaccio M,Riccio D,et al.1992.SARAS:Asynthetic aperture radar(SAR)raw signal simulator.IEEETransactions on Geoscience and Remote Sensing,30(1):110—123
Hazlett M,Andersh D J,Lee S W,et al.1995.XPATCH:a high-frequency electromagnetic scattering prediction code using shootingand bouncing rays.Proceedings of SPIE:The International Society for Optical Engineering
Ling H,Chou R C,Lee S W.1989.Shooting and bouncing rays:calculating the RCS of an arbitrarily shaped cavity.IEEETransactions on Antennas and Propagation,37(2):194—205
Margarit G,Mallorqui J J,Lopez-Martinez C.2008.GRECOSAR,aSAR simulator for complex targets:Application to urbanenvironments.International Geoscience and Remote SensingSymposium(IGARSS)
Margarit G,Mallorqui J J,Rius J M,et al.2006.On the usage ofGRECOSAR,an orbital polarimetric SAR simulator of complextargets,to vessel classification studies.IEEE Transactions onGeoscience and Remote Sensing,44(12):3517—3525
Wu T,Wang C,Zhang H.2007.Space-borne SAR image simulationbased on image characteristics.Journal of Remote Sensing,11(2):214—220
Xu F,Jin Y Q.2006.Imaging simulation of polarimetric SAR for acomprehensive terrain scene using the mapping and projectionalgorithm.Progress in Natural Science,16(11):1459—1471
吴涛,王超,张红.2007.基于图像特征的星载SAR图像模拟研究.遥感学报,11(2):214—220
徐丰,金亚秋.2006.基于映射投影(MPA)的复杂地面场景极化SAR成像模拟.自然科学进展,16(11)1459—1471
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