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We investigate the projective properties of the feature consisting of two concentric circles. We demonstrate there exist geometric and algebraic constraints on its projection. We show how these constraints greatly simplify the recoveries of the affine and Euclidean structures of a 3D plane. As an application, we assess the performances of two camera calibration algorithms.
Imaging geometry, concentric circles, projective plane, circular points, camera calibration.

I. Kweon, J. Kim and P. Gurdjos, "Geometric and Algebraic Constraints of Projected Concentric Circles and Their Applications to Camera Calibration," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 27, no. , pp. 637-642, 2005.
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