摘要
基于相位投影和双目视觉的三维光学测量系统已经广泛应用于各领域。系统通过平板标定技术得到摄像机的内参和外参;针对格雷码与相移结合技术在测量物体边缘位置解相位误差大的问题,采用多频外差原理的测量方式,使用拟合负指数求解像素点的绝对相位,使用对极几何进行亚像素立体匹配。实验证明:该系统可以完成复杂面型测量并且获得高精度点云数据,测量标准偏差为0.03 mm。
The construction of 3D optical measurement system based on binocular vision and phase projector is attracting more and more attentions due to his importance in automation produce. The camera internal and external parameters had been got by tablet calibration technology. In order to avoid the error by the methord based on the phase shift and Gray code,a technology based on multifrequency heterodyne principle had been explored out. The exact phase had been obtained by fitting negative exponential. The experimental results proves that by this system could be get the point cloud with high accuracy and the system error is of less than 0. 03 mm.
出处
《工业仪表与自动化装置》
2016年第4期24-26,39,共4页
Industrial Instrumentation & Automation
基金
四川省教育厅一般项目"应用于3D打印的三维测量系统研发"(15ZB0475)
四川省教育厅一般项目"高精度牙模三维测量系统及关键技术研究"(13ZB0377)
关键词
三维测量
标定
多频外差原理
相位解包裹
3D measurement
calibration
multifrequency heterodyne principle
phase unwrapping
