NDLI: Calibration of stereo cameras using a non-linear distortion model (CCD sensory)

Content Provider	IEEE Xplore Digital Library
Author	Weng, J. Cohen, P. Herniou, M.
Copyright Year	1990
Description	Author affiliation: Dept. of Electr. Eng., Ecole Polytech. de Montreal, Que., Canada (Weng, J.; Cohen, P.; Herniou, M.)
Abstract	A camera model is presented which accounts for major sources of camera distortion: radial, decentering, and thin-prism distortions. The proposed calibration procedure consists of two steps. In the first step, calibration parameters are estimated using a closed-form solution based on a distortion-free camera model. In the second step, the parameters estimated in the first step are improved iteratively through nonlinear optimization, taking into account camera distortions. According to minimum-variance estimation, the objective function to be minimized is the mean-square discrepancy between the observed image points and their inferred image projections computed with the estimated calibration parameters. A type of measure is introduced which can be used to directly evaluate the performance of the calibration and compare calibrations among different systems. The validity and the performance of the calibration procedure are tested on real images taken by wide-angle lenses. Results consistently show significant improvements over less complete camera models.
Starting Page	246
Ending Page	253
File Size	849672
Page Count	8
File Format	PDF
ISBN	0818620625
DOI	10.1109/ICPR.1990.118105
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-06-16
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Calibration Charge-coupled image sensors Nonlinear distortion Charge coupled devices Cameras Optical arrays Parameter estimation Computer vision Optical distortion Closed-form solution
Content Type	Text
Resource Type	Article

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