针对精密测角算法标定线阵相机内方位元素时仅标定一维方向的主点坐标及畸变, 导致该标定算法适应性及精度受限的问题, 提出了一种线阵相机二维高精度内方位标定方法。首先, 分析了线阵相机内方位元素模型, 然后, 针对该模型提出了一种基于二维转台的二维标定方法, 并给出了详细的标定步骤及数据处理方法, 最后, 将本文提出方法的标定结果与精密测角算法的标定结果进行了对比, 结果表明, 本文提出的标定方法的重投影误差为0.34 pixel, 相比于精密测角算法的1.25 pixel, 显著提高了标定精度, 且标定时不需要进行对准、调平等操作, 标定过程操作简单。

In this study, to address the problem of limited adaptability and accuracy of the exact measuring angle method, which only calibrates the principal point and distortion in a one-dimensional direction with a line-scan camera, a two-dimensional high-precision calibration method for a line-scan camera was proposed. First, the inner orientation elements model of a line-scan camera was analyzed. Then, a two-dimensional calibration method based on a two-axis precise rotation stage was proposed for the model. Detailed calibration steps and data processing methods were also given. Finally, the calibration results of the proposed method were compared with those of the exact measuring angle method. The results show that the reprojection error of the calibration method proposed in this study is 0.34 pixels, which is a significant improvement in calibration precision when compared to the 1.25 pixels of the exact measuring angle method. The proposed calibration method does not require alignment, and the calibration process is simple.