Calibration of transformation matrix in object body coordinate and camera coordinate

摘要

In this paper,a new coordinate system calibration is proposed in order to define the dependence of position between object body coordinate and camera coordinate which can be used in object measurement by the formation of image.Due to existing the fabrication and installation error,it is difficult to make system parallel between object body coordinate and camera coordinate.To resolve it,the deviation of the two coordinate system is demanded to measure detailed.The deviation compensation in the image processing software can ensure the accuracy the pitch angle and azimuth in the destination image of camera measurement system.In order to definite the position,a base coordinate system of theodolite is set by mutual-space measurement principle.After the measurement of theodolite system,a transformation matrix of the base coordinate system can be deduced.Changing the position of the theodolite station and adjusting the cross-screw to infinity,the transformation matrix between the base coordinate and star-sensor coordinate can be deduced by image formation of the destination at infinity.The position relation between object body and camera can be calculated by the transformation matrix.The results of the measurement experiment show that the gauging repeatability is 6' which can meet the system gauging demands.