多视点相机联合标定及改进的PMVS重建方法

提出一种能够在强约束条件下快速进行相机标定的方法。通过相机间6个相互独立的约束,充分利用系统的几何条件,确定相邻立体相机的固有关系;再以共线方程为基础推导强约束条件下的平差模型,并应用于自检校光束法平差,从而实现多相机系统的快速标定;最后利用改进的PMVS三维重建方法开展标定后系统的人体三维重建。实验表明,通过加入强约束条件,增加平差的多余观测数,提高了标定精度和鲁棒性,对三维重建的精度亦有较大提高,并且该方法可推广到多个相机组成的多相机立体量测系统的标定中。

Joint Multi-View Camera Calibration and Improved PMVS Reconstruction Method

A method is presented for rapid camera calibration under strong constraint conditions in this paper. Through six independent constraints among the cameras, the inherent relationship of adjacent stereo cameras is de-termined based on the geometry of the system. Then on the basis of the collinear equation, the adjustment model is derived under the condition of strong constraint, and applied to the method of self-calibration beam adjustment, so as to realize the rapid calibration of camera system. Finally, human body is reconstructed using the improved PM-VS method through our calibrated system. The experiment results reveal that the proposed method can effectively increase the redundant observations of the calibration adjustment system, and this can improve the accuracy and stability of the calibration. Moreover, the method can also be extended to other stereo camera systems which consist of more than two cameras.