Spatial enhancement of elevation data using a single multispectral image

Mark J. Carlotto

doi:10.1117/1.602381

1 February 2000 Spatial enhancement of elevation data using a single multispectral image

Mark J. Carlotto

Optical Engineering, Vol. 39, Issue 2, (February 2000). https://doi.org/10.1117/1.602381

A new method for enhancing the spatial resolution of lowresolution digital elevation models (DEMs) using a single higherresolution multispectral image is described. The method uses a nonlinear estimation algorithm to determine an empirical relationship between the spectral response of a pixel and the gradient or slope of its underlying elevation surface. This relationship is, in effect, the inverse of the reflectance map used in shape-from-shading to recover surface orientation from image brightness. However, unlike most shape-from-shading techniques, we do not assume constant albedo, nor do we assume a particular functional form for the reflectance map. A depth-from-gradient algorithm is used to generate high-resolution elevations from highresolution gradients using the low-resolution elevations as boundary values. Experimental results demonstrate the ability to generate enhanced resolution elevation maps from global 1-km DEMs and Landsat Thematic Mapper imagery.

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Mark J. Carlotto "Spatial enhancement of elevation data using a single multispectral image," Optical Engineering 39(2), (1 February 2000). https://doi.org/10.1117/1.602381

Published: 1 February 2000

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