Remotely sensed images from mountainous terrains are subject to important radiometric variations which we desire to correct. A quantitative analysis of a remote sensing model is presented and the different aspects of radiometric correction are overviewed. A computer simulation is performed in order to better understand the combined effects of anisotropic reflectance characteristics and variable surface orientations, as encountered in remote sensing of mountainous terrains covered with vegetation. The results illustrate typical reflectance effects and show that the possibilities for a radiometrical correction are limited. This is due to the practical difficulty of exactly determining all reflection properties in a mountain environment. However, as a practical approach to the correction, a compensation method is proposed, which considers the particularities of vegetated surfaces in mountainous regions.

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