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Proceedings Paper

Resolution improvement in speckle displacement and strain sensor by correlation interpolation
Author(s): Tamiki Takemori; Katsuyoshi Fujita; Ichirou Yamaguchi
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Paper Abstract

A new correlator which outputs 48 correlation values around the correlation peak is described, and several interpolation methods for the detection of the displacement of a speckle pattern with less than one pixel resolution of the linear image sensor are experimentally compared. The correlator is capable of computing the correlation function between the current frame and a reference frame. The use of the new correlator in conjunction with interpolation methods makes it possible to obtain the best value of the resolution for the speckle displacement of less than 0.2 pixels.

Paper Details

Date Published: 1 January 1992
PDF: 12 pages
Proc. SPIE 1553, Laser Interferometry IV: Computer-Aided Interferometry, (1 January 1992); doi: 10.1117/12.135299
Show Author Affiliations
Tamiki Takemori, Hamamatsu Photonics K.K. (Japan)
Katsuyoshi Fujita, Hamamatsu Photonics K.K. (Japan)
Ichirou Yamaguchi, RIKEN--Institute of Physical and Chemical Research (Japan)

Published in SPIE Proceedings Vol. 1553:
Laser Interferometry IV: Computer-Aided Interferometry
Ryszard J. Pryputniewicz, Editor(s)

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