Accession Number:

ADA314604

Title:

Underwater Imaging with Acoustic Lenses: Image Processing and Visualization,

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC ADVANCED INFORMATION TECHNOLOGY BRANCH

Personal Author(s):

Report Date:

1996-08-30

Pagination or Media Count:

29.0

Abstract:

This report discusses image processing, scene reconstruction, and visualization techniques used for underwater acoustic images taken with lens-based systems from a stationary platform. These systems are designed for high-resolution imaging of objects from distances of a few meters. The acoustic lenses used for beamforming in the imaging systems are made of crystal polystyrene and are cut in cylindrical or spherical shapes. The cylindrical lens has a fan-shaped beam pattern and produces a 2D intensity image or shadowgram, while the spherical lens with a cone-shaped beam produces a 3D intensity image. Test images obtained by the spherical lens contain a remarkable degree of detail.

Subject Categories:

  • Acoustic Detection and Detectors
  • Cybernetics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE