基于线纹尺的视觉检测标定方法

The Calibrating Method of Linear-Structural Visual System Based on Line Scale Device

摘要: 设计了一种基于线纹尺的线结构光视觉传感器直接标定法，提出了线纹平面靶标与特征点提取算法，不需要建立几何成像数学模型，通过获取已知三维空间坐标特征点的图像坐标，建立亚像素物像索引表，直接在物像索引表中查找相应的图像坐标，得到相应的三维空间坐标实现系统的直接标定。本标定方法对平台运动控制操作方便、算法实现简洁。实验结果验证了本方法的有效性。

Abstract: The paper designs a calibrating measurement method based on linear-structural visual sensor of line scale device. The paper proposes a calculation method, which combines line scale planar reference and special points. Through special graphical points in three-dimensional coordinates, we establish subpixel-image index table to directly calibrate the system. The calibrating measurement method is feasible in terms of operating the system, and the calculation process is more convenient. The results of the experiment also prove the effectiveness of this method.