Histogram equalization of vibration fringes in holography

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Abstract:



Common reconstructed fringes in holographic interferometry of vibration show rapidly diminishing intensity with extended amplitude limiting the measurement range. Using computer-simulated fringe patterns, linear histogram equalization is applied to redistribute the intensity for significant enhancement in the higher amplitude range. The cases of time-average and real-time single-frequency sinusoidal vibration are described.

Keywords: Holographic vibration analysis; digital image processing; enhancement of higher order fringes; histogram equalization

Document Type: Original Article

DOI: http://dx.doi.org/10.1078/0030-4026-00199

Affiliations: 1: 26044 Georgia Tech Station, Georgia Institute of Technology, Atlanta, Georgia 30332, USA 2: Center for Applied Optics, The University of Alabama In Huntsville, Huntsville, Alabama 35899, USA

Publication date: January 1, 2003

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