Epipolar Geometry of Line Cameras Moving with Constant Velocity and Attitude

ETRI Journal

关键词: Across-Track Stereo Coverage;    Along-Track Stereo Coverage;    Linear Array Scanners;    Normalized Images;    Epipolar Lines;    Epipolar Geometry;   

Others  :  1185291
DOI  :  10.4218/etrij.05.0104.0086

【 摘 要 】

Image resampling according to epipolar geometry is an important prerequisite for a variety of photogrammetric tasks. Established procedures for resampling frame images according to epipolar geometry are not suitable for scenes captured by line cameras. In this paper, the mathematical model describing epipolar lines in scenes captured by line cameras moving with constant velocity and attitude is established and analyzed. The choice of this trajectory is motivated by the fact that many line cameras can be assumed to follow such a flight path during the short duration of a scene capture (especially when considering space-borne imaging platforms). Experimental results from synthetic along-track and across-track stereo-scenes are presented. For these scenes, the deviations of the resulting epipolar lines from straightness, as the camera’s angular field of view decreases, are quantified and presented.

   

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