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Studying on the method of quick generating urban image mosaic

The technology of quickly generating city image mosaic is widely applied in urban planning, evaluating natural disasters and meeting city's emergency service. This paper utilizes existing 1:2000 orthophoto and 1:500 digital line graph (DLG) to get control information, and calculate parameters of image mosaic by image matching and aerotriangulation. At last quick and seamless auto-mosaic is implemented based on Thiessen polygon. Test results prove that our approach can quickly obtain large mosaic images, which satisfies the need of many society applications.