A METHOD FOR TRUE ORTHOPHOTO GENERATION BASED ON PROJECTION AND ITERATION STRATEGY
- 1Institute of remote sensing applications Chinese academy of sciences, Datun road, Beijing, China
- 2Satellite Surveying and Mapping Application Centre, Lianhuachi Road, Beijing, China
Keywords: True orthophoto, occlusion detection, projection plane, iteration method
Abstract. The conventional orthophotos always suffer from the problems of building lean and double mapping, due to the occluding of the buildings. This paper proposed a new occlusion detection method for true orthophoto generation. This method adopts the way of projecting roof and wall polygons to the ground horizontal planes, and obtains the occlusions by iteration strategy. Experiments with the color aerial image data of the city of Kunming shows that comparing to other two representative methods, this method can obtain more accurate results. Additionally, the neighboring images are used for occlusion compensation, and finally the true orthophoto is generated.