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Image enhancement through film recorder response contouring

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https://doi.org/10.1117/12.931938

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Abstract

In contrast to the traditional recording from high-altitude aircraft of Earth images directly onto film in their inherently continuous analog form, a Landsat Earth resources satellite samples the ground image brightness and records it on a digital, electronic medium. Although digitization incurs several extra steps in the reproduction of the imagery, it permits manipulation or enhancement of the data for special uses. For instance, image data enhancement techniques can be applied to partially restore contrast lost because of atmospheric luminance and scatter. More significantly, the digital-to-analog transfer function of the film recorder can be modified to simulate certain characteristics of other film types. Manipulation of a film's apparent gamma, relative speed, and linear-response region is easily accomplished by mapping the input data to a new distribution in real time using a hardware-implemented lookup table. To accomplish the desired photographic results, however, full cooperation and communication between photographic, electronic, and computer technologists is essential.

Publication type Conference Paper
Publication Subtype Conference Paper
Title Image enhancement through film recorder response contouring
DOI 10.1117/12.931938
Volume 278
Year Published 1981
Language English
Publisher Society of Photo-Optical Instrumentation Engineers
Contributing office(s) Earth Resources Observation and Science (EROS) Center
Description 10 p.
Larger Work Type Book
Larger Work Subtype Conference publication
Larger Work Title Proceedings Volume 0278, Electro-Optical Instrumentation for Resources Evaluation
First page 157
Last page 166
Conference Title 1981 Technical Symposium East
Conference Location Washington, D. C., United States
Conference Date November 6, 1981
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