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Proceedings Paper

Optical Vs. Electronic Enhancement Of Remote Sensing Imagery
Author(s): Robert N. Colwell; Edwin F. Katibah
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Paper Abstract

In the United States and in many other parts of the world, there is a rapidly increasing need for information as to the amount and condition of such earth resources as timber, forage, soils, water, minerals and agricultural crops. Usually because of the vastness of the geographic areas which must be covered, the needed information is best obtained, not by direct observation on the ground, but through the analysis of photographs, thermographs and other forms of remote sensing imagery acquired from high-flying aircraft, and/or earth-orbiting spacecraft. The amount of useful information that can be obtained by the image analyst often is increased substantially if the imagery is first "enhanced" by such means as density slicing, color coding, improving the signal-to-noise ratio, and combining multiple images into a single composite. Some scientists advocate the use of multiple lantern slide projectors or other optical devices for this purpose. Others advocate the use of closed-circuit color television equipment or other electronic devices. A combination of optical and electronic devices, however, usually produces the greatest amount of useful information, especially when several multidate and/or multiband images of the same area are available, each capable of providing certain unique kinds of information. Based on representative examples, mainly of the authors' NASA-funded test sites in California, the use and limitations of various optical and electronic image-enhancement devices and techniques are illustrated.

Paper Details

Date Published: 9 July 1976
PDF: 9 pages
Proc. SPIE 0074, Image Processing, (9 July 1976); doi: 10.1117/12.954707
Show Author Affiliations
Robert N. Colwell, University of California (United States)
Edwin F. Katibah, University of California (United States)

Published in SPIE Proceedings Vol. 0074:
Image Processing
John C. Urbach, Editor(s)

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