Differential Rectification of SLR-Images Using Map-Derived and Radar-Generated Digital Elevation Models.

Abstract

A multi-step approach to rectify radar images geometrically and radiometrically is presented. The method uses digital elevation models (DEMs) and an image simulator to establish the relation between radar image coordinates and ortho image locations. The simulation serves to create a synthetic gray value image similar in its geometry to the real radar image, associating with each image pixel a backscatter value dependent on the incidence angle and a DEM address. Correlation between simulated and real and real image results in a relation between radar backscatter values and DEM addresses and produces an ortho-image in an additional step. Stereo-derived and map-derived elevation models were used to demonstrate the rectification process for air- and spaceborne radar images. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Feb 29, 1984
Accession Number
ADA141828

Entities

People

  • F. Leberl
  • G. Domik
  • J. Raggam

Tags

Communities of Interest

  • Sensors
  • Space

DTIC Thesaurus Topics

  • Artificial Satellites
  • Computational Science
  • Computer Programming
  • Contracts
  • Coordinate Systems
  • Data Processing
  • Detectors
  • Digital Images
  • Geography
  • Grids
  • Image Processing
  • Jet Propulsion
  • Operating Systems
  • Radar
  • Side Looking Radar
  • Synthetic Aperture Radar
  • World Geodetic System

Readers

  • Computer Vision.
  • Radar Systems Engineering.