Accession Number:

ADA537412

Title:

High Frequency 2D Array Imaging

Descriptive Note:

Annual rept.

Corporate Author:

NAVAL EXPLOSIVE ORDNANCE DISPOSAL TECHNOLOGY DIV INDIAN HEAD MD

Report Date:

1998-01-01

Pagination or Media Count:

6.0

Abstract:

The ability to image underwater objects in turbid water conditions is crucial to EOD divers during render safe and exploitation procedures. The beamforming, transducer, electrical interconnect, signal, and image processing technologies for high frequency acoustic underwater imaging need to be explored, characterized and developed. A promising method for imaging objects underwater involves using acoustically pulsed energy to interrogate mine or ordnance like targets at standoff distances. Acoustic energy is not significantly affected by visual turbidity, since the acoustic wavelengths in the MHz region are much longer than optical wavelengths. The tradeoff is that longer wavelengths reduce resolution. The objective of this effort is to develop imaging methodologies incorporating high frequency acoustics, densely packed transducer arrays, and interconnect electronics that will allow images to be created with sufficient resolution to classify mine features. In addition, image quality can be improved by developing image processing algorithms that take advantage of compound data sets and use 3D volumetric techniques such as volume rendering, template matching, and morphological filtering.

Subject Categories:

  • Cybernetics
  • Submarine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE