Application of Digital Interferogram Evaluation Techniques,

Abstract

A system for digitally evaluating interferograms, based on an image-processing system connected to a host computer, has been implemented. The system supports one- and two-dimensional interferogram evaluations. Interferograms are digitized, enhanced, and then segmented. The fringe coordinates are extracted, and the fringes are represented as polygonal data structures. Fringe numbering and fringe interpolation modules are implemented. The system supports editing and interactive features, as well as graphic visualization. An application of the system to the evaluation of double-exposure interferograms from the transonic flow field around a helicopter blade and the reconstruction of the three-dimensional flow field is given.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1985
Accession Number
ADA159633

Entities

People

  • F. Becker
  • Y. H. Yu

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Algorithms
  • Character Recognition
  • Computational Science
  • Computer Graphics
  • Detection
  • Flow Fields
  • Fluid Mechanics
  • Helicopter Rotors
  • Image Processing
  • Interferograms
  • Interferometers
  • Lasers
  • Measurement
  • Phase Measurement
  • Refractive Index
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Computer Science.
  • Image Processing and Computer Vision.