Accession Number:

ADA076110

Title:

Signal Signatures of Topographic Features Using Analog Technology.

Descriptive Note:

Research note,

Corporate Author:

ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA

Personal Author(s):

• Chen ,Pi-Fuay
• Seemuller,William W.

Report Date:

1979-05-01

Pagination or Media Count:

36.0

Abstract:

Signal signatures and signatures of various spectral decompositions of selected topographic features, such as line roads, road intersections, and rectangular buildings, were developed by using analog signal processing techniques. The signal signatures were constructed in the spatial domain, and the corresponding signatures of various spectral components were obtained in the Walsh transform domain. An electronic system for generating two-dimensional Walsh functions for decomposition of topographic features was designed and built. A scheme for detecting the decomposed spectral components using an analog processor was presented. Author

Descriptors:

• *TOPOGRAPHY
• *MAPS
• *SPECTRUM ANALYSIS
• ARRAYS
• PATTERN RECOGNITION
• ANALOG SYSTEMS
• ORTHOGONALITY
• SOLID STATE ELECTRONICS
• CIRCUIT ANALYSIS
• GRAY SCALE
• SIGNAL GENERATORS
• SPECTRUM SIGNATURES
• WALSH TRANSFORMATION
• WALSH FUNCTIONS

Subject Categories:

• Cartography and Aerial Photography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE