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

Multispectral imaging


Image enhancement

Earth observing sensors


Error analysis

Image processing

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