Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B3, 297-302, 2012
http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XXXIX-B3/297/2012/
doi:10.5194/isprsarchives-XXXIX-B3-297-2012
© Author(s) 2012. This work is distributed
under the Creative Commons Attribution 3.0 License.
 
31 Jul 2012
A SEMIAUTOMATIC APPROACH FOR GENERATION OF SITE MODELS FROM CARTOSAT-2 MULTIVIEW IMAGES
A. Mahapatra, S. Pandey, D. Sudheer Reddy, P. S. Subramanyam, B. K. Das, P. V. Radhadevi, J. Saibaba, and G. Varadan Advance Data Processing Research Institute, Department of Space, 203 Akbar Road, Secunderabad-500009, INDIA
Keywords: Site Model, Physical Sensor Model, Relative orientation, conjugate points, edge extraction, normalized DSM Abstract. In the last decade there has been a paradigm shift in creating, viewing and utilizing geospatial data for planning, navigation and traffic management of urban areas. Realistic, three-dimensional information is preferred over conventional two dimensional maps. The paper describes objectives, methodology and results of an operational system being developed for generation of site model from Cartosat-2 multiview images. The system is designed to work in operational mode with varying level of manual interactivity. A rigorous physical sensor model based on collinearity condition models the "step n stare" mode of image acquisition of the satellite. The relative orientation of the overlapping images is achieved using coplanarity condition and conjugate points. A procedure is developed to perform digitization in mono and stereo modes. A technique for refining manually digitized boundaries is developed. The conjugate points are generated by establishing a correspondence between the points obtained on refined edges to analogous points on the images obtained with view angles ±26 deg. It is achieved through geometrically constrained image matching method. The results are shown for a portion of multi-view images of Washington City obtained from Cartosat-2. The scheme is generic to accept very high resolution stereo images from other satellites as input.
Conference paper (PDF, 3643 KB)


Citation: Mahapatra, A., Pandey, S., Sudheer Reddy, D., Subramanyam, P. S., Das, B. K., Radhadevi, P. V., Saibaba, J., and Varadan, G.: A SEMIAUTOMATIC APPROACH FOR GENERATION OF SITE MODELS FROM CARTOSAT-2 MULTIVIEW IMAGES, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXIX-B3, 297-302, doi:10.5194/isprsarchives-XXXIX-B3-297-2012, 2012.

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