DocumentCode :
3498634
Title :
Distortion model selecting and accuracy evaluation for CCD camera calibration
Author :
Zhou, Guoqing ; Tang, Xiaofang ; Yuan, Baozong
Author_Institution :
Inst. of Inf. Sci., Northern Jiaotong Univ., Beijing, China
Volume :
2
fYear :
1996
fDate :
14-18 Oct 1996
Firstpage :
875
Abstract :
The precision of a CCD camera calibration depends on both the distortion models selected and the signal-to-noise. The former is called the intrinsic factor, and latter is the extrinsic factor. So far, none of the fixed criterion has been used for selecting the distortion model, and almost all are personal or experiential. None of the fixed criterion has been used for determining the degree of error with which we measure the 2D image coordinates, and the amount by which the calibration model can correctly compensate for the distortion in a fixed imagery system in current calibration methods. The paper presents notable and correlation coefficient checks in the statistics for selecting the distortion model, using the signal-to-noise ratio as the criterion to measure the compensation capability. A large number of simulation and practical experiments show: (1) various distortion models exist for imagery systems; (2) there is a high correlation among the distortion parameters or between the distortion parameters and the camera parameters; (3) the larger the signal-to-noise ratio, the larger the compensation capability, and the smaller signal-to-noise ratio, the smaller the compensation capability; and (4) the relation between the precision improvement and the signal-to-noise ratio is an exponential function
Keywords :
CCD image sensors; calibration; cameras; correlation methods; image processing; parameter estimation; statistical analysis; 2D image coordinates; CCD camera calibration; calibration methods; calibration model; camera parameters; correlation coefficient; data noise; distortion model accuracy evaluation; distortion model selection; distortion parameters; experiments; exponential function; imagery systems; notable check; signal to noise; simulation; statistics; Calibration; Cameras; Charge coupled devices; Charge-coupled image sensors; Coordinate measuring machines; Current measurement; Distortion measurement; Error correction; Signal to noise ratio; Statistics;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing, 1996., 3rd International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-2912-0
Type :
conf
DOI :
10.1109/ICSIGP.1996.566227
Filename :
566227
Link To Document :
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