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15 November 1993 Generation of synthetic images for the alleviation of radiometric influences induced by the topography
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Abstract
This paper presents results from the application of model based techniques for an efficient correction to the topographically induced radiometric influences on the remotely sensed imagery. Thus, in a first step, relief induced geometric distortions of optical imagery must be removed, taking terrain elevation into account. In a second step the radiometry of the image is considered. Synthetic images are generated based on the Digital Elevation Models, and sun and satellite position at the time of acquisition of the image. The synthetically derived images model the image formation process for the direct lighted and shaded areas, using direct, indirect, and diffuse illumination. The resemblance of the synthesized image to reality is evaluated for a mountainous alpine region covered by snow. In a last step the data derived from the synthetic image are used for radiometric correction of the effects of the topography.
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Mihai P. Datcu and Francesco Holecz "Generation of synthetic images for the alleviation of radiometric influences induced by the topography", Proc. SPIE 1938, Recent Advances in Sensors, Radiometric Calibration, and Processing of Remotely Sensed Data, (15 November 1993); https://doi.org/10.1117/12.161552
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