基于二次曲线的线阵相机标定技术

针对绕固定轴旋转的线阵相机，提出一种基于二次曲线的相机标定方法。该方法只需要相机在2个或更多不同的方位拍摄图像，通过相机的转动在每个方位拍摄多帧图像。靶标采用一个包含3个或更多二次曲线的平板。相机和靶标可以自由移动，不需要知道运动参数。通过坐标变换，把每个方位所拍摄的多帧线阵图像排列成面阵图像。从面阵图像中提取二次曲线作为标定基元，以此简化基元对应问题。仿真实验结果表明，该方法精度较高，鲁棒性较好。

Calibration Technology of Line-scan Cameras Based on Quadratic Cuves

According to the fixed axis rotation linear array camera, this paper puts forward a kind of camera calibration method based on quadratic cuves. It only needs two or more different directions to shooting images, and captures multi-frame image in every direction through the way of camera rotating. A pattern plane including three or more of quadratic is used, and camera and target can move freely, which do not know the motion parameters. Multi-frame linear images shoot in every direction are arranged to area array image by coordinate transformation. The way of using quadratics extracted from area array image as calibration primitive elements simplifies the problem of primitive corresponding. Simulation results show that the method is very robust and has high precision.