Abstract
Camera calibration is a crucial step in 3D reconstruction. To improve the reconstruction accuracy, we propose a calibration method for the paracatadioptric camera based on the projective properties of spheres. The starting point of the method is to consider the three great circles that are parallel to the projection of the sphere onto the unit viewing sphere in the imaging model of the paracatadioptric camera. The absolute conic is determined from the orthogonal vanishing points obtained from the intersections of the projections of the three great circles on the image plane. Then, the intrinsic parameters are obtained from the algebraic constraints on the image of the absolute conic. Compared with results obtained by Zhao’s, Yu’s and Li′s methods, 3D reconstruction using our method appears more accurate.
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Yang, R., Zhang, J. A calibration method for paracatadioptric cameras based on circular sections. Multimed Tools Appl (2022). https://doi.org/10.1007/s11042-022-12918-9
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DOI: https://doi.org/10.1007/s11042-022-12918-9