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Optical Engineering

Spatial Sharpening Of Thematic Mapper Data Using A Multiband Approach
Author(s): Victor T. Tom; Mark J. Carlotto; Daniel K. Scholten
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Paper Abstract

A new image enhancement technique has been applied to enhance Landsat-4 Thematic Mapper (TM) thermal infrared (IR) imagery and has improved its effective ground resolution from 120 m to 30 m. The technique is based on an adaptive multiband least squares (LS) method for computing an optimal image estimate from reference images, and a frequency domain replacement step. The approach relies on the assumption that at a sufficiently small resolution registered TM imagery data are locally correlated across the bands. Using the local correlation property, visible and IR reference bands are used to predict the thermal IR image data. The prediction estimate is then used to augment the spatial high frequency information in the original thermal data. Preliminary experiments enhancing 120 m IR imagery (simulated degradation) to 30 m resolution show a signal-to-noise ratio improvement of 19 dB.

Paper Details

Date Published: 1 December 1985
PDF: 4 pages
Opt. Eng. 24(6) 241026 doi: 10.1117/12.7973623
Published in: Optical Engineering Volume 24, Issue 6
Show Author Affiliations
Victor T. Tom, The Analytic Sciences Corporation (United States)
Mark J. Carlotto, The Analytic Sciences Corporation (United States)
Daniel K. Scholten, The Analytic Sciences Corporation (United States)

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