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Optical Engineering

Digital Fringe Reduction Techniques Applied To The Measurement Of Three-Dimensional Transonic Flow Fields
Author(s): Friedhelm Becker; Yung H. Yu
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Paper Abstract

A system for digital interferogram evaluation 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 segmented. The fringe coordinates are extracted, and the fringes are represented as polygon 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 3-D flow field are aiven.

Paper Details

Date Published: 1 June 1985
PDF: 6 pages
Opt. Eng. 24(3) 243429 doi: 10.1117/12.7973502
Published in: Optical Engineering Volume 24, Issue 3
Show Author Affiliations
Friedhelm Becker, NASA Ames Research Center (United States)
Yung H. Yu, NASA Ames Research Center (United States)

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