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Proceedings Paper

Digitally Enhanced Visual Displays Facilitate The Analysis Of Landsat Imagery
Author(s): Robert N. Colwell
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Paper Abstract

Digital records of scene brightness, as recorded by Landsat's 4-band multispectral scanner (MSS), were enhanced and displayed in full color on a CRT and also in color print form. Digital enhancements, made through the use of appropriate algorithms, entailed corrections for (1) satellite roll, pitch, yaw and variations in heading; (2) scale variations caused by earth curvature, variations in satellite altitude and changing scan velocity of the MSS mirror; (3) radiometric variations resulting from variable gains within the MSS components; and (4) striping caused by an occasional repetitive malfunction of the MSS detectors. To facilitate the identification and mapping of wildland resource features, and thereby to provide resource managers with much needed information, several known image examples of each resource category were extracted from this enhanced, band-ratioed imagery and compiled into reference materials known as "image analysis keys". Through the proper visual display of these keys image analysts attempted to identify other examples of these same kinds of resource features on the digitally enhanced Landsat imagery. Conclusions regarding the increased identification accuracies achievable by such means are presented.

Paper Details

Date Published: 28 July 1981
PDF: 9 pages
Proc. SPIE 0271, Advances in Display Technology II, (28 July 1981); doi: 10.1117/12.931773
Show Author Affiliations
Robert N. Colwell, Earth Satellite Corporation (United States)

Published in SPIE Proceedings Vol. 0271:
Advances in Display Technology II
John R. Parsons, Editor(s)

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