PARAMETER CALIBRATION METHOD AND APPARATUS
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United States of America Patent
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Dec 8, 2014
filing date -
Jun 8, 2012
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Abstract
Embodiments of the present invention disclose a parameter calibration method. The method includes: acquiring a calibration template image, where the calibration template image is obtained by photographing a calibration template; performing corner detection on the calibration template image to extract image corners; calculating a radial distortion parameter according to the extracted image corners; performing radial distortion correction according to the calculated radial distortion parameter, so as to reconstruct a distortion correction image; and according to a perspective projection relationship between the calibration template and the reconstructed distortion correction image, calculating intrinsic and extrinsic parameters to implement parameter calibration, where the intrinsic and extrinsic parameters include: a matrix of intrinsic parameters, a rotational vector, and a translational vector. The present invention may be applied to parameter calibration for an imaging apparatus such as a camcorder and a camera in a case of a high distortion.
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