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Optical Engineering

Application of wavelet filtering for vibration analysis using digital speckle pattern interferometery
Author(s): Chandra Shakher; Rajesh Kumar; Shashi Kumar Singh; Saba Akhter Kazmi
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Paper Abstract

We have investigated the utility of wavelet filters for enhancing contrast in the digital speckle pattern interferometric fringes obtained from a vibrating loudspeaker diaphragm and from the vibrating bracket of an electric motor. Experimental results reveal that use of properly chosen other filters along with the wavelet filter gives better enhancement. Our investigations also show that if the data are preprocessed by median filtering before implementing the wavelet filtering, then a weakly diffusing object requires a higher-kernel filter and strongly diffusing object requires lower-kernel one.

Paper Details

Date Published: 1 January 2002
PDF: 5 pages
Opt. Eng. 41(1) doi: 10.1117/1.1420192
Published in: Optical Engineering Volume 41, Issue 1
Show Author Affiliations
Chandra Shakher, Indian Institute of Technology (India)
Rajesh Kumar, Indian Institute of Technology (India)
Shashi Kumar Singh, Indian Institute of Technology (India)
Saba Akhter Kazmi, Indian Institute of Technology (India)


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