Differential Rectification of SLR (Side Looking Radar)-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 used 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 similiar 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 image results in a realtion between radar backscatter values and DEM addresses and produces and ortho-image in an additional step. Stereo-derived and map-derived elevation models were used to demonstrate the rectification process for air-and spaceborn radar images.

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Document Details

Document Type
Technical Report
Publication Date
Jan 31, 1984
Accession Number
ADA154671

Entities

People

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

Tags

Communities of Interest

  • Sensors
  • Space

DTIC Thesaurus Topics

  • Computational Science
  • Computer Programming
  • Computers
  • Coordinate Systems
  • Data Processing
  • Detectors
  • Digital Images
  • Earth Sciences
  • Geography
  • Grids
  • Image Processing
  • Jet Propulsion
  • Radar
  • Side Looking Radar
  • Synthetic Aperture Radar
  • United States
  • World Geodetic System

Readers

  • Computer Vision.
  • Systems Analysis and Design