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• W3205913144 abstract "A high-precision camera intrinsic parameters calibration method based on concentric circles was proposed. Different from Zhang's method, its feature points are the centers of concentric circles. First, the collinearity of the projection of the center of concentric circles and the centers of two ellipses which are imaged from the concentric circles was proved. Subsequently, a straight line passing through the center of concentric circles was determined with four tangent lines of concentric circles. Finally, the projection of the center of concentric circles was extracted with the intersection of the straight line and the line determined by the two ellipse centers. Simulation and physical experiments are carried out to analyze the factors affecting the accuracy of circle center coordinate extraction and the results show that the accuracy of the proposed method is higher. On this basis, several key parameters of the calibration target design are determined through simulation experiments and then the calibration target is printed to calibrate a binocular system. The results show that the total reprojection error of the left camera is reduced by 17.66% and that of the right camera is reduced by 21.58% compared with those of Zhang's method. Therefore, the proposed calibration method has higher accuracy." @default.
• W3205913144 created "2021-10-25" @default.
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• W3205913144 date "2021-10-19" @default.
• W3205913144 modified "2023-10-16" @default.
• W3205913144 title "Conic tangents based high precision extraction method of concentric circle centers and its application in camera parameters calibration" @default.
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• W3205913144 doi "https://doi.org/10.1038/s41598-021-00300-y" @default.
• W3205913144 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8526631" @default.
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