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Proceedings Paper

Automatic Evaluation Of Interferograms
Author(s): Friedhelm Becker; Gerd E. A. Meier; Horst Wegner
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Paper Abstract

A system for the automatic evaluation of interference patterns has been developed. After digitizing the interferograms from classical and holografic interferometers with a television digitizer and performing different picture enhancement operations the fringe loci are extracted by use of a floating-threshold method. The fringes are numbered using a special scheme after the removal of any fringe disconnections which might appear if there was insufficient contrast in the interferograms. The reconstruction of the object function from the numbered fringe field is achieved by a local polynomial least-squares approximation. Applications are given, demonstrating the evaluation of interferograms of supersonic flow fields and the analysis of holografic interferograms of car-tyres.

Paper Details

Date Published: 17 March 1983
PDF: 8 pages
Proc. SPIE 0359, Applications of Digital Image Processing IV, (17 March 1983); doi: 10.1117/12.965989
Show Author Affiliations
Friedhelm Becker, Max-Planck-Institut fur Stromungsforschung (Germany)
Gerd E. A. Meier, Max-Planck-Institut fur Stromungsforschung (Germany)
Horst Wegner, Max-Planck-Institut fur Stromungsforschung (Germany)


Published in SPIE Proceedings Vol. 0359:
Applications of Digital Image Processing IV
Andrew G. Tescher, Editor(s)

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