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TIN based Matching using Stereo Airphoto and Airborne LiDAR  

Kim, Hyung-Tae (한국토지공사 국토도시연구원)
Han, Dong-Yeob (전남대학교 공과대학 건설환경학부)
Publication Information
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography / v.26, no.4, 2008 , pp. 443-452 More about this Journal
Abstract
To deduce 3D linear information which express shapes of buildings out of airphoto by fusion of airphoto and LiDAR data, this research went through 2 process. First, research made LiDAR data into projected data of 2D based on airphoto. For this, the virtual points were added to solve the visual problem of building boundary area which has poor information because the attribute in LiDAR data. Research construct irregular triangular nets from modified LiDAR data and judge visual triangular nets out of image. Through this, research can make reference to information of triangular nets in each image pixel. Second, 3D information was extracted from stereo images segments by combining extracted information of visible region and 2D irregular triangular nets. Matching way based on TIN for segments from stereo images was used. Matching condition based on TIN can improve about 20% of edge matching accuracy compared to existing quadrilateral condition of epipolar geometry.
Keywords
TIN; Matching; LiDAR; Airphoto; Visibility; Building Modeling
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