计算机单目视觉测量系统

Monocular computer vision measurement system

为了精确实现对空间物体的测量,提出了利用线激光、单CCD相机、小孔成像与激光面约束模型的激光线测量法。引进三维信息已知的标准阶梯块,作为激光面约束的标定块。由计算机控制摄像头对实物连续拍摄和实时处理,提取激光线上的像素坐标,利用建立的模型将二维坐标转换成三维坐标,再以点云的形式重构出物体,实现三维自动测量。实践中检测系统测量精度可达到0.05mm。

In order to improve the precision of measurement, a new un-contact measurement system consisting of linear laser and single CCD camera was presented. For the system, technologies of pinhole imaging and laser plane constraint mathematic model, standard ladder-like block as a calibration of laser plane constraint are applied. The computer control camera takes pictures continually and handles the pictures timely to extract pixel coordinate of the laser line, and converts the 2D coordinate into 3D coordinate based on the model and rebuilds the object as point cloud to achieve auto 3D un-contact measurement. Experiments demonstrate that the precision of the system is 0.05 mm.