晃动平台上对空拍摄大视场摄像机的标定方法

发布时间：2019-07-10 21:50

【摘要】：针对晃动平台对空拍摄大视场摄像机难以标定的情况,提出了利用无人机(UAV)作为动态控制点来现场标定摄像机参数的方法。该方法控制无人机在摄像机视场内飞行,并用与晃动平台固联的无人机定位测量系统对无人机位置进行测量,从而整个飞行过程中的无人机位置均可当作控制点对摄像机进行标定。实验中控制点数目充足,易满足控制点在空间和在图像上均匀散布的要求,可以准确求解摄像机内外参数。突破了无法在视场中布设传统像机标定方法所需控制点,使晃动平台上大视场摄像测量无法现场采集参考图像进行高精度标定的局限。对实验条件要求低,最少只需要晃动平台基准坐标系下2个基准点和方位像机光心位置即可标定摄像机内外参数。该方法已成功应用于系泊状态下船舶中摄像机参数的标定。
[Abstract]:In view of the fact that it is difficult to calibrate the camera with large field of view photographed in the opposite air of the sloshing platform, a method of calibrating the camera parameters in the field by using UAV (UAV) as the dynamic control point is proposed. This method controls the UAV to fly in the camera field of view, and uses the UAV positioning and measuring system connected with the sloshing platform to measure the position of the UAV, so that the position of the UAV can be calibrated as a control point in the whole flight process. In the experiment, the number of control points is sufficient, which can easily meet the requirements of uniform dispersion of control points in space and on the image, and can accurately solve the internal and external parameters of the camera. It breaks through the limitation that the control points needed by the traditional camera calibration method can not be set up in the field of view, so that the large field of view camera measurement on the sloshing platform can not collect the reference image on the spot for high precision calibration. The requirements for the experimental conditions are low, and the internal and external parameters of the camera can be calibrated by at least two reference points and the optical center position of the azimuth camera under the reference coordinate system of the sloshing platform. This method has been successfully applied to the calibration of camera parameters in ships under mooring.
【作者单位】：国防科学技术大学航天科学与工程学院;图像测量与视觉导航湖南省重点实验室;
【基金】：国家自然科学基金(11332012)
【分类号】：TN948.41

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