Camera calibration of image total station by single-target rotatry photography
In order to achieve high-precision camera calibration of the image total station telescope camera and a wide-angle camera,a camera calibration model for the image total station in rotary photography mode was derived using a single target rotary photography method,and the correlation analysis of model parameters was performed.Aiming at the parameter coupling problem,a double-face observation method was proposed for parameter decoupling.The feasibility of the single target rotary photography method was experimentally verified,and high-precision calibration results of the image total station telescope camera and the wide-angle camera were obtained.The results show that the camera parameters obtained from calibration can be used for image measurement at different photographic distances,with an average reprojection error of 1.0 pixel at the calibration points of the telescope camera,and the corresponding image angular resolution is 2.0".The average reprojection error at the calibration point during fixed focus photography with a telescope camera is 0.15 pixel,and the corresponding image angular resolution is 0.3".The average reprojection error at the calibration point of a wide-angle camera is 0.6 pixel,and the corresponding image angular resolution is 13.3".This research has certain reference significance for improving the image measurement accuracy of the image total station and expanding its related applications.
imaging systemscamera calibrationrotary photographyimage total stationdouble-face observation
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