On the sensitivity of camera calibration

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摘要

The orientation position errors of an object's coordinate frame are determined when the offset of image centre and lens distortion are not included in the calibration process. The orientation and position errors are [(u0)2 + (v0)2]0.5/f and [(u20+v20)T2z + (u20T2z + v20Ty2)]0.5/f, respectively, where f is the focal length, (u0, v0) is the offset of image centre and (TxTyTz) is the position of an object. We also obtain the following conclusions: (a) The offset of image centre has little effect on the determinations of the position and orientation of a coordinate frame; (b) the lens distortion will not dramatically change the position and orientation of a coordinate frame; (c) the scale factor has a great effect on the position of a coordinate frame, and on the accuracy of measurement; (d) the offset of image centre is more sensitive than the lens distortion on the determinations of the position and orientation of a coordinate frame. Finally, some experimental results are given to demonstrate the theoretical analysis given in this paper.

论文关键词:sensitivity,camera calibration,position and orientation,measurement accuracy

论文评审过程:Received 5 March 1992, Revised 16 April 1993, Available online 10 June 2003.

论文官网地址:https://doi.org/10.1016/0262-8856(93)90061-K