关键词: 摄像机标定, 共面点, 正交约束

Abstract: Coplanar camera calibration is the process of determining the extrinsic and intrinsic parameters of camera，where a set of image and two-dimensional control points are known.This paper presents a simple and efficient technique to compute the calibration parameters for coplanar calibration.Computing of the calibration parameters is directly performed on computer image array in the framem buffer.First，camera image center is calibrated by the precalibration.Then according to the relation between computer image array in the framem and world coordiantes，the parameters can be solved using available orthogonality constraints，where the scale factor is assumed as one and the lens distortion is not considered.The proposed algorithm is tested with digital synthetic image and real image.The results show that the proposed technique is accurate and effective.

Key words: camera calibration, coplanar target, orthogonality constraint