Abstract
A procedure has been developed to estimate and correct for external effects (haze level, solar zenith angle) in a Landsat Thematic Mapper scene. The procedure is based on the Dave model and uses a scatterplot-matching technique to estimate haze level directly from the scene data. A means for dealing with haze that spatially varies in density over a large scene is also included. The effectiveness of this procedure is demonstrated by showing that it permits a data screening algorithm with fixed thresholds to work on hazy areas as well as clear ones. An alternative formulation is proposed that would replace manual haze estimation with automated estimation based on a computed diagnostic feature.
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