地形辐射校正模型研究进展

从经验模型、物理模型及半经验模型3个方面综述了地形辐射校正模型研究的主要进展,并从模型的输入参数、前提假设条件和评价方法3个方面讨论了现有模型存在的一些问题.最后,对地形辐射校正模型的研究前景进行了展望,认为可以从多源或多时相数据、图像增强或信息填充等方面恢复阴影区域信息,提高模型的校正精度,考虑引入新的数理统计方法进行精确的定量评价,并建议地形辐射校正模型研究应该更加重视阴影区域光谱信息的恢复,尤其是在地形复杂的山区.

The Progress in the Study of Topographic Radiometric Correction Models

In this paper,the authors reviewed the progress in such models of topographic radiometric correction as empirical models,physical models and semi-empirical models,and then discussed some problems of existing models in three aspects,i.e.,the input parameters,the hypothesis conditions and the evaluation methods of the models.Finally,the possible improvements of the models in the future were proposed,such as combining multiple-source images,image enhancement or information filling to improve the accuracy of the models and considering the introduction of new mathematical statistical methods for accurate quantitative evaluation.Some proposals are also put forward about improving the method for recovering the information of sun-shaded areas,especially in areas with rugged terrain.