Epipolar Rectification for CARTOSAT-1 Stereo Images Using SIFT and RANSAC
Other literature type
Sudheer Reddy, D.
Radhadevi, P. V.
(issn: 2194-9034, eissn: 2194-9034)
acm: ComputingMethodologies_COMPUTERGRAPHICS | ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
Cartosat-1 provides stereo images of spatial resolution 2.5 m with high fidelity of geometry. Stereo camera on the spacecraft has look
angles of +26 degree and -5 degree respectively that yields effective along track stereo. Any DSM generation algorithm can use the
stereo images for accurate 3D reconstruction and measurement of ground. Dense match points and pixel-wise matching are
prerequisite in DSM generation to capture discontinuities and occlusions for accurate 3D modelling application. Epipolar image
matching reduces the computational effort from two dimensional area searches to one dimensional. Thus, epipolar rectification is
preferred as a pre-processing step for accurate DSM generation. In this paper we explore a method based on SIFT and RANSAC for
epipolar rectification of cartosat-1 stereo images.