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Omnidirectional Camera Motion Estimation Using Projected Contours  

Hwang, Yong-Ho (Dept. of Image Eng., Graduate School of Advanced Imaging Science Multimedia & Film, Chung-Ang Univ.)
Lee, Jae-Man (Dept. of Image Eng., Graduate School of Advanced Imaging Science Multimedia & Film, Chung-Ang Univ.)
Hong, Hyun-Ki (Dept. of Image Eng., Graduate School of Advanced Imaging Science Multimedia & Film, Chung-Ang Univ.)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.44, no.5, 2007 , pp. 35-44 More about this Journal
Abstract
Since the omnidirectional camera system with a very large field of view could take many information about environment scene from few images, various researches for calibration and 3D reconstruction using omnidirectional image have been presented actively. Most of line segments of man-made objects we projected to the contours by using the omnidirectional camera model. Therefore, the corresponding contours among images sequences would be useful for computing the camera transformations including rotation and translation. This paper presents a novel two step minimization method to estimate the extrinsic parameters of the camera from the corresponding contours. In the first step, coarse camera parameters are estimated by minimizing an angular error function between epipolar planes and back-projected vectors from each corresponding point. Then we can compute the final parameters minimizing a distance error of the projected contours and the actual contours. Simulation results on the synthetic and real images demonstrated that our algorithm can achieve precise contour matching and camera motion estimation.
Keywords
Omnidirecional camera; camera calibration; projection model; corresponding contour;
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