Topographic Relaxation Study.

Abstract

Digital terrain models produced by computer correlation of stereo images are likely to contain occasional gross errors in terrain elevation. These errors typically result from having mismatched sub-areas of the two images, a problem which can occur for a variety of image-and terrain-related reasons. Such elevation errors produce undesirable effects when the models are further processed, and should be detected and corrected as early in the processing as possible. IAC has developed algorithms to detect and correct errors in digital terrain models. These algorithms focus on the use of constraints on both the allowable slope and the allowable change in slope in local areas around each point. Relaxation-like techniques are employed in the iteration of the detection and correction phases to obtain best results. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 15, 1979
Accession Number
ADA095156

Entities

People

  • Marsha Jo Hannah

Organizations

  • Geospatial Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Algorithms
  • Artificial Intelligence
  • Classification
  • Computations
  • Computer Science
  • Computers
  • Consistency
  • Data Sets
  • Detection
  • Digital Elevation Models
  • Elevation
  • Engineers
  • Iterations
  • Mathematical Analysis
  • Models
  • Oscillation
  • Terrain Models

Readers

  • Computer Vision.
  • Systems Analysis and Design