利用立体视觉的线结构光参数标定

准确标定系统参数是利用线结构光进行高精度测量的前提，文中提出了一种基于双目立体视觉的线结构光参数标定算法，以期达到在工业现场进行高精度、强鲁棒性标定的目的。算法首先采用Tsai两步法标定摄像机内参数和双目相机坐标系间的刚体变换，然后利用立体视觉极线约束条件匹配双目激光条纹点，并将其重构到三维空间以进行光平面标定。相对于...

Line structured light parameter calibration based on stereo vision

High accurancy calibration is the precondition of the measurement by structured light.To achieve the above purpose,this paper presents a calibration algorithm for line structured light based on stereo vision.Firstly,intrinsic parameters and the transformation between stereo cameras were calibrated by the Tsai method.Then,laser pixels extracted from stereo image pairs were matched by epiploar constraint.At last,the matched points were reconstructed to 3 dimensions to achieve the calibration of laser plane.Compared with other popular methods,the proposed laser plane calibration algorithm needs no calibration target.In contrast,dense calibration points can be got by projecting the structured light to any object.The algorithm′s availability is assessed by its application to a self-referenced line structured light scanning system with two cameras.Experimental results show that the RMS calibration error by the proposed algorithm is less than 0.034 mm and the scanning error is 0.065 mm.