The Journal of The Institute of Image Information and Television Engineers
Online ISSN : 1881-6908
Print ISSN : 1342-6907
ISSN-L : 1342-6907
Calibration Accuracy and its Dependence on Target Point Arrangement for a Zoom Lens Camera System
Toshio NumaoMasatoshi Okutomi
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1997 Volume 51 Issue 12 Pages 2126-2132

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Abstract
To input an accurate magnification image, calibration of the focal length is needed in an active camera system which can control the zoom, focus, iris, and viewing angle. We show that in a calibration with a pinhole camera model, the arrangement of the measurement points influences accuracy and good camera parameter estimation is difficult by using a single target. In addition, we show that by calibrating with the zoom lens camera model we propose, good camera parameter estimation can be achieved even when the number of the measurement points on a single plane is small and the error of the image coordinates is large.
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