Anisotropic reflectance correction of SPOT-3 HRV imagery

Abstract

The problem of anisotropic reflectance in mountainous terrain is well known. It was required to determine the efficacy of anisotropic reflectance correction (ARC) of imagery acquired over the western Himalaya. The Minnaert correction procedure was evaluated using a single Minnaert constant ( k ), locally computed k s and land cover-computed k s. Findings illustrate the need for computing k s, such that anisotropic reflectance caused by topography and land cover is accounted for. This resulted in a significant reduction in the topographic effect. The results indicate that land cover-computed k values can be used effectively for anisotropic reflectance correction.