Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W4, 263-268, 2015
http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-1-W4/263/2015/
doi:10.5194/isprsarchives-XL-1-W4-263-2015
© Author(s) 2015. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
26 Aug 2015
HEIGHT GRADIENT APPROACH FOR OCCLUSION DETECTION IN UAV IMAGERY
H. C. Oliveira, A. F. Habib, A. P. Dal Poz, and M. Galo São Paulo State University, Graduate Program in Cartographic Sciences, Presidente Prudente, Brazil
Purdue University, Lyles School of Civil Engineering, West Lafayette, Indiana, USA
São Paulo State University, Dept. of Cartography, Presidente Prudente, Brazil
Keywords: UAV, DSM, TIN, Double Mapping, Height Gradient, Occlusion Detection, True Orthophoto Abstract. The use of Unmanned Aerial Vehicle (UAV) significantly increased in the last years. It is used for several different applications, such as mapping, publicity, security, natural disasters assistance, environmental monitoring, 3D building model generation, cadastral survey, etc. The imagery obtained by this kind of system has a great potential. To use these images in true orthophoto generation projects related to urban scenes or areas where buildings are present, it is important to consider the occlusion caused by surface height variation, platform attitude, and perspective projection. Occlusions in UAV imagery are usually larger than in conventional airborne dataset due to the low-altitude and excessive change in orientation due to the low-weight and wind effects during the flight mission. Therefore, this paper presents a method for occlusion detection together with some obtained results for images acquired by a UAV platform. The proposed method shows potential in occlusion detection and true orthophoto generation.
Conference paper (PDF, 1204 KB)


Citation: Oliveira, H. C., Habib, A. F., Dal Poz, A. P., and Galo, M.: HEIGHT GRADIENT APPROACH FOR OCCLUSION DETECTION IN UAV IMAGERY, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-1/W4, 263-268, doi:10.5194/isprsarchives-XL-1-W4-263-2015, 2015.

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