受地面均匀场地宽度的限制,使用均匀场地两点相对辐射校正算法,只 能对幅宽比较窄的线阵推扫式传感器进行相对校正。提出了一种改进的基于均 匀场地的遥感图像相对辐射校正算法,该算法通过在一幅或多幅图像上选取满足亮 度要求的区域来计算所选区域内及区域间的相对定标系数,根据区域内和区域间相 对定标系数将宽幅线阵推扫式传感器全体探测元的响应相对校正到一致。结果表明: 该算法能够实现宽幅线阵推扫式传感器的相对辐射校正,实现简单,校正效果 理想。

Due to the limited uniform field breadth, the relative radiometric correction algorithm based on uniform field two-point can only be applied to narrow swath pushbroom sensor. An improved relative radiometric correction algorithm is put forward with remote sensing image based on uniform field. In the algorithm, the eligible radiance field is sampled from one image or multi images, and the relative calibration coefficients of the detectors in the selected regions and detectors among adjacent regions are calculated. The response of all detectors in broad pushbroom sensors is relatively regulated based on the calculated relative calibration coefficients of the detectors in the selected regions and detectors among adjacent regions. The results show that the algorithm can easily realize the correction of relative radiance in broad swath pushbroom sensors with good performance.