基于点和直线特征的高分辨率航空单线阵影像几何纠正

Geometric Rectification of High-resolution Airborne Linear Array Pushbroom Image based on Point and Line Feature

针对恶劣飞行条件下,高分辨率航空单线阵影像基于POS数据几何纠正后仍存在内部畸变的问题,利用影像上丰富的点线纹理特征,开展了基于特征的高分辨率航空单线阵影像几何纠正方法研究,分析了影像段落小带来的外方位元素解算时复共线性问题,采用线角分开迭代法实现了外方位元素的求解,使得该模型能够适用于高分辨率航空单线阵影像的几何纠正。实验结果表明:此方法能够有效校正因外方位元素测量引起的航空单线阵影像几何畸变。

For flight under harsh conditions,aiming at the internal distortion remained after the high-resolution airbornelinear array pushbroom images geometric correction based on the POS data,the method of geometric rectification of High-Resolution Airborne Linear Array pushbroom Image based the point and line feature is studied,and the strong relativity in computing the exterior orientation elements caused by the small image pieces is analyzed.The method that line elements and angle elements are computed separately which is used for the solution of exterior orientation.The results of experiments indicated that the method is feasible for geometric distortion in Airborne Linear Array pushbroom Image casued by the measurement error of the elements in POS data.