本文提出了一种基于平面靶标的结构光系统参数快速标定方法。该方法基于摄影测量技术, 使用编码点制作的平面靶标, 由相机获取靶标平面光条图像, 根据编码点的图像坐标以及靶标坐标, 经过仿射变换和后方交会等处理, 可以快速方便的得到光平面标定点的相机坐标, 将标定点进行拟合即可完成标定。实验表明, 该方法的光平面拟合中误差优于 0.07 mm, 系统测量精度的平均相对误差优于 0.33%, 具有较高的标定精度。同时该方法可以实现点、线、面等模式的结构光参数标定, 通用性较强, 标定效率较高, 方法灵活, 适合现场标定。

A fast calibration method for structured-light parameters of 3D measurement system based on the planar target is proposed. This method, based on photogrammetry technology, using the code point making planar target, obtains the target plane light images from the camera. After the affine transformation and resection according to the codes point’s image coordinates and target coordinates, the camera coordinate of light plane calibration point can be got quickly and easily, then calibration completed after the plane fitting. Experiments results indicate that this method has high accuracy, the RMS of light plane fitting is better than 0.07 mm, and the average relative error is better than 0.33%. Furthermore, this method is also suitable for many other modes structured light with high generality and efficient, flexible and suitable for field calibration.