Histogram equalization of vibration fringes in holography

Authors: Singh T.¹; Vikram C.S.²

Source: Optik – International Journal for Light and Electron Optics, Volume 113, Number 11, January 2003 , pp. 499-503(5)

Publisher: Urban & Fischer

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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; histogram equalization; digital image processing; enhancement of higher order fringes

Language: English

Document Type: Original article

DOI: http://dx.doi.org/10.1087/0030-4026-00199

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: 2003-01-01