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Proceedings Paper

Use of Matlab filtering techniques in digital speckle pattern interferometry
Author(s): Vadakke Matham Murukeshan; Lai Yin Fei; V. Krishnakumar; Seng Lin Ong; Anand Krishna Asundi
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Paper Abstract

In interferometric fringe pattern analysis, specular and speckle fringe patterns are the two main divisions. While specular fringes are characterized by quality fringes with high spatial resolution, speckle (that obtains due to the diffuse scattering of the coherent radiation from an optically rough surface) fringe patterns, which contain high frequency carrier (as noise), are characterized by noisy fringes. This paper concentrates on this aspect and the matlab based filtering methods to improve quality of speckle fringe patterns by developing the appropriate software. Further, the newly developed software Macurv will be presented which can give the second order derivative (curvature) fringe information . A software with several functions is written using Matlab. The objective of the software is to provide a more effective way for post-processing of the speckle interferometric fringes. The algorithm and functions of the developed software Macurv will be explained.

Paper Details

Date Published: 30 October 2001
PDF: 9 pages
Proc. SPIE 4596, Advanced Photonic Sensors and Applications II, (30 October 2001); doi: 10.1117/12.447356
Show Author Affiliations
Vadakke Matham Murukeshan, Nanyang Technological Univ. (Singapore)
Lai Yin Fei, Nanyang Technological Univ. (Singapore)
V. Krishnakumar, Nanyang Technological Univ. (Singapore)
Seng Lin Ong, Nanyang Technological Univ. (Singapore)
Anand Krishna Asundi, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 4596:
Advanced Photonic Sensors and Applications II
Anand Krishna Asundi; Wolfgang Osten; Vijay K. Varadan, Editor(s)

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