Removal of Range-Dependent Artifacts from Sidescan Sonar Imagery

Abstract

A 'radiosity correction' algorithm to improve the quality of sidescan sonar mosaics is reported. The algorithm removes consistent range-dependent variations from sidescan sonar imagery caused by failure of the TVG (time-varying gain) to completely compensate for variations due to transducer beam profiles and sediment backscatter strength. The correction is appropriate to high-frequency sidescan sonars with constant gain characteristics, such as the Klein 5000. The algorithm appears robust in situations where the bottom is relatively flat and the towfish altitude does not change much.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2001
Accession Number
ADA393168

Entities

People

  • Stuart Anstee

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Electronic Warfare
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Abstracts
  • Altitude
  • Artifacts
  • Australia
  • Backscattering
  • Boundaries
  • Classification
  • Computers
  • Frequency
  • Grazing Angles
  • High Resolution
  • Intensity
  • Physics Laboratories
  • Seabed
  • Slant Range
  • Sonar
  • Transducers

Readers

  • Acoustical Oceanography.
  • Computer Vision.
  • Radar Systems Engineering.