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《Chinese Journal of Scientific Instrument》 2010-09
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Calibrating lens distortion of camera in all directions

Li Qin,Da Feipeng,Wen Qingchuan(Institute of Automation,Southeast University,Nanjing 210096,China)  
On the basis of radial distortion model and perspective projection geometry,the relationship between a conic line and two straight lines are analyzed.Then a method of measuring lens distortion with a calibration board designed to calibrate camera in all directions is proposed with the help of LCD dynamic refreshing function.In simulation experiment,the reversion of a designed distorted ellipse coincides with the ideal undistorted ellips,which shows that the coefficients of radial distortion can be obtained accurately using the proposed method.In real experiment,the distortion parameters can be measured accurately in all directions.The proposed measuring method is independent of both intrinsic and extrinsic parameters,so it can be applied before the calibration process and eliminate the coupling effect between distortion and camera parameters.
【Fund】: 国家自然科学基金(6071002);; 江苏省自然基金(BK2010058)资助项目
【CateGory Index】: TP391.41
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