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This paper proposes and demonstrates an approach based on the vanishing point theory for calibration of non-metric camera lens distortion. Images in this paper are photographed by Cannon-5d-35mm non-metric camera. The distortion correction by 3D control field, 2D Control field and non-control field method respectively are studied experimentally. The results show that radial distortion plays an important...
Semi-automatic extraction of road networks is greatly needed to accelerate the acquisition and update of geodata. However, the road surfaces are seriously disturbed by occlusion of vehicles or shadows on high resolution remotely sensed imagery in urban areas, which makes most of road trackers, using least-squares template matching, inefficient. Fortunately, the scale of many disturbing features such...
Three Gorges Reservoir area is a weak area in terms of ecological environment and an area with frequent landslide hazard disasters. These disasters will cause many negative effects to the Three Gorges Water Conservancy Project as well as the social economy in the reservoir area. In order to decrease the lives and possessions loss brought by landslide disasters, landslide hazard assessment is highly...
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