An algorithm to determine the fish-eye lens optical center using edge straight-line-fitting
LIN Chunyu
GAO Yi
WANG Xin
HUANG Qi
ZHAO Yao
Abstract：In order to remove the distortion in fish-eye image,the camera calibration is required.We put forward an algorithm to determine fish-eye lens optical center using the edge straight-linefitting technology with a given camera parameters table.This algorithm utilizes the physical size of each pixel in the image plane as well as the camera focal length.Therefore,the scale factor in horizontal and vertical axes of the reference matrix can be determined.With some provided parameters,the optic center can be determined by traversing the pixel coordinates within given range.The optic center,which made the weighted distance between corrected points and fitted straight lines smallest,is needed.Experimental results show that compared with the conventional camera calibration algorithm,this algorithm reduces the accumulation of errors due to the using of inaccurate parameters and makes the calibration results more accurate.
Keywords：information processingcalibrationoptic center coordinateedge straight-line-fittingcoordinate transformationdistortionfish-eye lens
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 8-14 )