利用矩形角点计算了成像平面与靶标平面之间的单应性矩阵, 获取了结构光中心线在靶标平面的直线方程, 结合消失点原理获取了直线上任意多个标定点的三维坐标;通过多幅图像标定点的拟合得出了光平面方程.实验表明, 该算法可实现光平面参量的快速准确标定, 标定结果达到的定位准确度为±0.437 mm, 符合工业现场的实际需求.与交比不变法相比, 该方法获取标定点的效率高, 靶标设计简单、通用性强.

The mapping relationship of homography matrix between the image plane and the target plane was calculated by the rectangular corner points, the linear equation of the center line of the structured-light in the target plane was obtained. Based on the vanishing point theory, the coordinates of arbitrary points on structured-light in target line in camera coordinate system was obtained. The light plane equation was fitted by calibration points extracted from multiple images. Experiments show that the method can achieve a fast and an accurate calibration of structured-light plane parameters with the positioning accuracy at 0.437 mm, and suitable for the requirements on industrial field. Compared with the methods based on invariance of cross ratio, the proposed method is more universal which has a higher efficiency to extract calibration points and the target design is more simple.