ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Articles | Volume I-4
https://doi.org/10.5194/isprsannals-I-4-311-2012
https://doi.org/10.5194/isprsannals-I-4-311-2012
24 Jul 2012
 | 24 Jul 2012

A METHOD FOR TRUE ORTHOPHOTO GENERATION BASED ON PROJECTION AND ITERATION STRATEGY

X. Wang and J. Xie

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.