三线阵CCD相机亚像元精度几何标定方法研究

Study on a geometric calibration method for three-linear-array CCD camera with sub-pixel accuracy

为了解决三线阵CCD立体测绘相机内方位元素的几何标定问题,提出了一种实现相机亚像元精度内方位元素和交会角标定的方法。该方法利用光学高精度角度发生器和CCD细分测量相结合的检测方法,由最小二乘回归分析,实现相机内方位元素的标定,并通过扫描星点图像标定交会角。校飞实验的数据处理结果验证了该方法的有效性。

In order to solve the problem in geometrical calibration for inner orientation elements of three-linear-array CCD stereo mapping camera, a method for calibrating inner orientation elements and contact angle of a camera with sub-pixel accuracy is proposed. By means of the combination of high-accuracy optical angle generator with CCD subdivision measurement, the calibration for inner orientation elements of the camera is carried out by least square regression analysis. The contact angle is calibrated by scanning star point image. The data processing results of flight calibration experiments demonstrate that the method is effective.