New uses of shadow enhancementShadow enhancement of topographic linears in photographic or scanner images is a valuable tool for interpretation of geologic structures. Whether linears will be enhanced or subdued depends on sun angle and azimuth. The relationship of the sun's attitude to topographic slopes determines which trends are available for interpretation in existing imagery, and it can be used to select the time of day, surface properties, and film and filter characteristics in planning aircraft flights or satellite orbital passes. The technique of selective shadow enhancement can be applied to all photographic or imaging experiments, but is best for snow-covered scenes, side-looking radar images, and painted relief models.
Document ID
19750039675
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Sawatzky, D. L.
Lee, K. (Colorado School of Mines Golden, Colo., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1974
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: Remote sensing of earth resources. Volume 3 - Third Conference on Earth Resources Observation and Information Analysis System