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《Geomatics and Information Science of Wuhan University》 2011-06
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Comparison of Linear and Circular Feature Extraction Methods Based on Laser Point Clouds of an Ancient Architecture

ZHAN Qingming1,2,3,4 ZHOU Xingang1,2 XIAO Yinghui1,2,3 YU Liang2,3(1 School of Urban Design,Wuhan University,8 South Donghu Road,Wuhan 430072,China)(2 Research Center for Digital City,Wuhan University,8 South Donghu Road,Wuhan 430072,China)(3 State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing,Wuhan University,129 Luoyu Road,Wuhan 430079,China)(4 School of Remote Sensing and Information Engineering,Wuhan University,129 Luoyu Road,Wuhan 430079,China)  
Terrestrial laser scanner(TLS) is a kind of new sensors which has been developed in recent years.In order to construct the objects using the point clouds,one of the problems has to be tackled first is feature extraction.In order to extract linear and circular features of ancient architecture,we segment point clouds and identify these segments according to their geometric features and physical properties of targeting objects.The Hough transform and the least squares method are used to extract lines and circles from laser point clouds of ancient architecture.The effectiveness of these two kinds of algorithms is compared and tested with real data.Several experimental results are presented as well.
【Fund】: 国家863计划资助项目(2006AA12Z151);; 国家自然科学基金资助项目(40871211)
【CateGory Index】: TU18
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