Implementation of Three Speckle Reduction Filters for Solid Propellant Combustion Holograms

Abstract

Speckle noise appears when a diffuse light hologram of a particle field is reconstructed with a laser. The speckle must be reduced so that particles of interest may be counted and sized. This thesis describes speckle and a figure of merit known as the speckle index. Three speckle reduction filters suggested by work in the area of synthetic aperture radars were implemented, discussed and compared. An IBM AT personal computer with Itex/PC image processing software was used for the comparison. The geometric filter performed best overall, but may not be superior in every circumstance.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1986
Accession Number
ADA176583

Entities

People

  • Thomas D. Edwards

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Algorithms
  • Combustion
  • Computer Programs
  • Computers
  • Engineering
  • Figure Of Merit
  • Holograms
  • Image Processing
  • Particle Size
  • Particles
  • Processing Equipment
  • Propellants
  • Rocket Engines
  • Solid Propellants
  • Synthetic Aperture Radar
  • United States

Fields of Study

  • Physics

Readers

  • Aerosol Science/Aerosol Physics
  • Optical Physics and Photonics.
  • Radar Systems Engineering.

Technology Areas

  • Directed Energy