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Proceedings Paper

Calibration of digital camera IOP using radial alignment constrain and vanish point geometry
Author(s): Gang Xu; Zenglai Dong; Jiejun Wang
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Paper Abstract

This paper presents our research on calibrating IOP of digital camera with mono-view. First, the Radial Alignment Constrain (RAC) from Tsai's two-stage calibration is outlined and extended to handle with camera principle point parameters. Second, we relate principle point to other camera parameters by means of two vanishing points from the perspective projection of group lines, parallel to World Coordinate System X, Y axis, respectively, and with the relation, the function-dependence among parameters within the equation derived from extended RAC are eliminated. Third, based on the extended RAC, a new nonlinear equation for IOP calibration purpose is formulated and optimally solved with Least Square technique as well as initial value for parameters are determined. Finally, a set of stimulated images generated with virtual plane grid lines and known camera parameters are used for calibration experiment. The comparison of proposed approach with Tsai's two-stage calibration is also given in this paper and valuable conclusions are conducted as well.

Paper Details

Date Published: 8 July 2011
PDF: 6 pages
Proc. SPIE 8009, Third International Conference on Digital Image Processing (ICDIP 2011), 80092F (8 July 2011); doi: 10.1117/12.896196
Show Author Affiliations
Gang Xu, Guilin Univ. of Electronic Technology (China)
Zenglai Dong, Guilin Univ. of Electronic Technology (China)
Jiejun Wang, Guilin Univ. of Electronic Technology (China)

Published in SPIE Proceedings Vol. 8009:
Third International Conference on Digital Image Processing (ICDIP 2011)
Ting Zhang, Editor(s)

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