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针对考虑太阳直接辐射、天空散射辐射以及来自于附近地表反射辐射的复杂地形EMT+遥感影像地形校正物理模型公式复杂、计算繁琐、不易实施的特点以及存在过度校正的缺陷,对该物理模型进行简化和改进。提出一套简化模型相关参数,即r值,Vt,Vd,T↓(λ,θ)等的计算方案,从而简化计算过程,提高计算效率。并针对该地形校正物理模型朗伯体假设的缺陷,引入Minnaert参数k时模型进行非朗伯体修正。简化和改进的地形校正物理模型的校正实验结果表明该模型很好地消除了复杂地形EMT+遥感影像的地形阴影,从而证明该地形校正物理模型的简化和改进方案可行。

Aiming at the shortcomings of the physical algorithm for topographic effect removal on remotely sensed data , such as formula complicated, computation difficult and uneasy operation, etc, the modification for simplifying the algorithm was proposed to take solar direct irradiance, diffuse sky irradiance and reflected irradiance from adjacent surface due to direct and diffuse irradiance into account. The original physical algorithm was developed with the assumption that the surface is Lambertian which results...