Error analysis on relative position of target of binocular measurement system

Solution of target pose is influenced by measurement error of 3D coordinate of target feature points directly, to determine error factors that influence target pose accurately, distribution and comprehensive on the errors reasonably is the key to improve measurement precision. At present, the accuracy of point extraction and feature points matching has reached a bottleneck according to the existing algorithm, but the internal structure and calibration of the camera which can reduce the measuring error has huge research space. In this paper, through establishing the coordinate measuring equation of image point, the impact of various error factors on location of the target was analyzed synthetically. Through the experimental analysis and simulation, the errors of internal structure and calibration which impact on the coordinate of imaging point is within a pixel, when f=0.031 9 m, and the distance of target is 20 m, measurement accuracy of the target is 0.029 4 m. It has great reference value on the design of the internal structure of optical imaging system and the selection of electronic devices.