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A High Precision Method for Getting The Camera Parameters

Duan Fajie, Zhang Jianxin, Ye Shenghua (State Key Laboratory of Precision Measuring Technology and Instruments,Tianjin University,Tianjin,300072)  
A novel high precision method for getting the parameters of a camera is proposed in the paper.The mathematical model of the camera is set up by use of the perspective transfer theory.The radial and tangential distortions of the camera lens are fully considered.First the distortion coefficient of the camera and an intermediate matrix are derived by use of Newton Gaussian nonlinear searching method.Then the other model parameters can be separated from the intermediate matrix.In order to solve the initial searching value,the intermediate matrix is obtained by use of the linearized method or the simple iterative method.Thus the nonlinear search ing speed can be sped up and the nonlinear searching accuracy can be improved.The quick speed and high precision obtaining method for the camera parameters have been proved in theory and in practice.
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