An Analysis of a Relaxation Scheme to Improve Terrain Elevation Data.

Abstract

Elevation matrices derived from correlation of digital stereo images often contain errors resulting from a breakdown of the correlation process. One such matrix was corrected using a relaxation algorithm where each point was given a reliability based on comparison with its nearest and next-nearest neighbors. These reliabilities were then used to determine if and how much a point was to be corrected; the process was iterated. The algorithm removed small error areas, but large erroneous regions wer not corrected, even when terrain slope classification information was considered. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1982
Accession Number
ADA119257

Entities

People

  • James A. Shine
  • Michael A. Crombie

Organizations

  • Geospatial Research Laboratory

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Algorithms
  • Army
  • Artificial Intelligence
  • Cartography
  • Classification
  • Computer Science
  • Correlation Techniques
  • Data Processing
  • Databases
  • Digital Images
  • Elevation
  • Engineering
  • Engineering Drawings
  • Engineers
  • Feature Extraction
  • Information Science
  • Test And Evaluation

Readers

  • Computer Vision.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.