Distortion measurement of CCD imaging system with short focal length and large-field objective

Distortion measurement of CCD imaging system with short focal length and large-field objective

The measuring technology for high-distortion TV images taken by CCD imaging system with short focal length and large-field objective is investigated carefully. According to the principle of optical measurement, a camera model accounting with polynomial descriptions of distortion coordinates. Polynom...

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Veröffentlicht in:Optics and lasers in engineering 2005-10, Vol.43 (10), p.1137-1144
Hauptverfasser: Lin, Jiaming, Xing, Mailing, Sha, Dingguo, Su, Datu, Shen, Tingzhi
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Calibration
CCD imaging system
Large-field distortion
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container_issue 10
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creator Lin, Jiaming
Xing, Mailing
Sha, Dingguo
Su, Datu
Shen, Tingzhi
description The measuring technology for high-distortion TV images taken by CCD imaging system with short focal length and large-field objective is investigated carefully. According to the principle of optical measurement, a camera model accounting with polynomial descriptions of distortion coordinates. Polynomial fitting is much better than others presented in literatures about camera calibration. Optical center is successfully pre-determined by laser self-alignment and software optimization, whose error of location is less than 0.01 pixel. To locate each sample dot in the high distortion (36%) image, a horizontal and a vertical grating is used. Using the equipments and software developed in experiments, the distortion of the CCD imaging system with focal length f ′ = 2.6 mm and view-field 120° is measured accurately. The measurement precision is 0.2%. The method can be applied in practice.
doi_str_mv 10.1016/j.optlaseng.2004.07.006
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subjects Calibration
CCD imaging system
Large-field distortion
title Distortion measurement of CCD imaging system with short focal length and large-field objective
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