Accession Number:

AD1113652

Title:

A Method for the Three-Dimensional Reconstruction of Underwater Objects

Descriptive Note:

[Technical Report, Memorandum Report]

Corporate Author:

SACLANT UNDERSEA RESEARCH CENTRE LA SPEZIA (ITALY)

Personal Author(s):

Report Date:

1996-10-01

Pagination or Media Count:

28

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.

Subject Categories:

  • Optics
  • Submarine Engineering

Distribution Statement:

[A, Approved For Public Release]