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Proceedings Paper

Compressed data for temporal fringe analysis in interferometry
Author(s): Tuck Wah Ng; Kar Tien Ang
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Paper Abstract

Temporal fringe pattern analysis is gaining prominence in interferometry; in particular for transient phenomena studies. This form of analysis, nevertheless, necessitates large data storage. Current compression schemes do not facilitate efficient data retrival and may even result in important data loss. Here, we describe a novel compression scheme that does not result in crucial data loss and allows the efficient retrieval of data for temporal fringe analysis. In sample tests using digital speckle inferometry or fringe patterns of a plate and of a cantilever beam subjected to temporal phase and load evolution respectively, a compression ratio of 1.6 was achieved without filtering out any data from discontinuous and low fringe modulation spatial points. By eliminating 38% of the data from discontinuous and low fringe modulation special points, a very significant compression ratio of 2.4 was attained.

Paper Details

Date Published: 2 August 2004
PDF: 8 pages
Proc. SPIE 5531, Interferometry XII: Techniques and Analysis, (2 August 2004); doi: 10.1117/12.557143
Show Author Affiliations
Tuck Wah Ng, National Univ. of Singapore (Singapore)
Kar Tien Ang, National Univ. of Singapore (Singapore)

Published in SPIE Proceedings Vol. 5531:
Interferometry XII: Techniques and Analysis
Katherine Creath; Joanna Schmit, Editor(s)

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