采用双相机结构光三维测量技术解决遮挡问题

Resolving Occlusion Problems by Using 3D Light Measurement System with Dual Camera

针对单目结构光投影三维视觉测量系统固有的相机遮挡问题,给出了基于相机—投影仪—相机系统模型的结构光三维测量方案,并阐述了测量系统的测量原理和实现方法。系统建模时将相机—投影—相机系统看作是两个独立的相机—投影仪三维视觉测量系统,在分别得到被测对象的三维数据后,通过采用全局坐标统一方法得到同一空间坐标系下的三维点坐标。该方法可以得到较高精度的全局测量结果,重复测量相对误差约0.2%。

To overcome the well-known inherent problem of the occlusion caused by single-camera-projector system,a three-dimensional measurement method based on camera-projector-camera structured light system is proposed. The system measurement theory and implementation method are detailed. In system modeling,the camera-projection-camera system is considered as two independent camera-projector units. After the two sets of point cloud data,these two independent systems are acquired respectively,the high accuracy measurement point cloud data is obtained in the same spatial coordinate system by using the introduced system calibration methods and coordinate system unification techniques. The experimental results show that the method＇s performance and effectiveness and the relative measurement error is about 0. 2%.