Intrinsic parameter calibration procedure for a (high-distortion) sh-eye lens camera with distortion model and accuracy estimation (1996)
| Venue: | Pattern Recognit |
| Citations: | 42 - 2 self |
BibTeX
@ARTICLE{Shah96intrinsicparameter,
author = {Shishir Shah and J. K. Aggarwal},
title = {Intrinsic parameter calibration procedure for a (high-distortion) sh-eye lens camera with distortion model and accuracy estimation},
journal = {Pattern Recognit},
year = {1996}
}
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Abstract
Abstract--This paper presents a calibration procedure for a fish-eye lens (a high-distortion lens) mounted on a CCD TV camera. The method is designed to account for the differences in images acquired via a distortion-free l ns camera setup and the images obtained by a fish-eye lens camera. The calibration procedure ssentially defines a mapping between points in the world coordinate system and their corres-ponding point locations in the image plane. This step is important for applications incomputer vision which involve quantitative measurements. The objective of this mapping is to estimate the internal parameters of the camera, including the effective focal length, one-pixel width on the image plane, image distortion center, and distortion coefficients. The number of parameters to be calibrated is reduced by using a calibration pattern with equally spaced ots and assuming a pin-hole model camera behavior for the image center, thus assuming negligible distortion at the image distortion center. Our method employs anon-finear t ansforma-tion between points in the world coordinate system and their corresponding location on the image plane. A Lagrangian minimization method is used to determine the coefficients of the transformation. The validity and effectiveness ofour calibration and distortion correction procedure are confirmed by application of this
Keyphrases
distortion model intrinsic parameter calibration procedure image plane accuracy estimation sh-eye lens camera image distortion center world coordinate system calibration procedure distortion-free n camera setup distortion coefficient corres-ponding point location lagrangian minimization method ofour calibration pin-hole model camera behavior distortion correction procedure fish-eye lens camera fish-eye lens internal parameter image center anon-finear ansforma-tion negligible distortion one-pixel width effective focal length high-distortion lens quantitative measurement corresponding location calibration pattern ccd tv camera
