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为了解决在大视场摄像机高精度标定中大尺寸靶标难以制作加工的问题,提出了一种基于小靶标拼接的大视场摄像机标定方法。该方法将小靶标在摄像机视场内多个位置进行摆放,通过各个小靶标之间的刚体变换,并考虑拼接过程中存在的约束条件,将各个小靶标拼接成一个覆盖整个摄像机视场的大靶标,然后使用该大靶标对大视场摄像机进行标定。仿真和实际实验表明该方法标定精度与使用实际大靶标进行标定时标定精度相当,能够实现对大视场摄像机的高精度标定。
In order to solve the problem that it is difficult to fabricate large size target in the high precision camera with large field of view, a large field camera calibration method based on small target splicing is proposed. In this method, the small targets are placed in a plurality of positions in the field of view of the camera. Through the rigid body transformation between the small targets and considering the constraints existing in the splicing process, the small targets are spliced into one covering the entire camera field of view Big target, then use the big target to calibrate the big field camera. The simulation and practical experiments show that the calibration accuracy of this method is equivalent to the calibration accuracy when using the actual large target calibration, which can realize the high precision calibration of the large field camera.