Camera Standardization Method Based on Planar Template

Aiming at the camera calibration in the drawing of the scene for the road traffic accident,a method for camera calibration based on planar template is proposed in this paper.Initial values are computed in the image central area where the distortion is small,partial calibration values are calculated through a subspace trust region method based on the interior-reflective Newton method,by introducing distortion model and employing linear feature constrain approach,remaining parameters can be calculated.Experimental results show that the proposed method simplifies calibration process,reduces computation and improves computing speed.