线结构光双目传感器钢坯轮廓测量标定方法

针对现有线结构光轮廓尺度测量系统标定方法对环境要求高、设备昂贵、标定过程复杂等问题，提出了一种基于网格平面标定板的现场标定方法。该方法主要特点是不需要复杂的标定模型和高精度的辅助设备，只需要将2 mm宽和高的矩阵状标定板置于需要测量区域，通过角点检测求出基于同一个世界坐标系的标定参数，并完成对双目摄像机标定系统误差校正，最后把测量系统统一到一个图像坐标系。该标定方法应用于钢坯轮廓尺度测量中，实测数据表明其具有较强的鲁棒性和可行性，测量误差为0.05 mm。

Calibration Method for Billet Outline Dimension Measurement Using Linear-structure Light with Two-senor

To solve the calibration problems in the dimension measurement based on linear-structure light such as high requirement of environment，complicate calibration procedure and so on，a calibration method based on the grid panel has been presented. Its main advantage is that，rather than a complicated calibration model and high precision auxiliary equipment，only a calibration plane with 2 mm width and height at measurement place is needed. With corner-detection, the calibration parameters based on a global world coordinate can calculated,  the revising system error correction was completed，and finally the measurement system into the image coordinate system was merged. The calibration method has been applied in billet outline dimension measurement and the experimental data shows that the method has stronger robustness and feasibility with the error of 0.05 mm.