A Method for the Three-Dimensional Reconstruction of Underwater Objects

Abstract

This report describes a method to estimate the three-dimensional aspects of underwater objects using a sequence of sonar images. The data are recorded by a sector scanning sonar, carried by an underwater vehicle which follows a circular track around the object. The sonar images are segmented into three kinds of regions : echo, shadow and background. The echo information corresponds to the signal back-scattered by the object while the shadow is due to the absence of back-scattering from behind the object. The remaining information composes the background. The reconstruction scheme processes the echo and shadow information separately. A two-dimensional elevation map is estimated from the shadow information and a two-dimensional reflection map is computed from the echoes.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1996
Accession Number
AD1113652

Entities

People

  • B. Stage
  • B. Zerr

Organizations

  • SACLANT ASW Research Centre

Tags

Communities of Interest

  • Air Platforms
  • Autonomy

DTIC Thesaurus Topics

  • Artificial Intelligence
  • Autonomous Underwater Vehicles
  • Computer Vision
  • Digital Image Processing
  • Digital Images
  • Electronic Mail
  • Elevation
  • Engineering
  • Experimental Data
  • High Resolution
  • Image Processing
  • Image Segmentation
  • Images
  • Nato
  • Scanning Sonar
  • Sonar
  • Sonar Images
  • Three Dimensional
  • Two Dimensional
  • Underwater Objects
  • Underwater Vehicles
  • Vehicles

Readers

  • Computer Vision.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Radar Systems Engineering.