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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 7, Iss. 3 — Mar. 1, 2009
  • pp: 210–213

Homomorphic partial differential equation filtering method for electronic speckle pattern interferometry fringes based on fringe density

Fang Zhang, Wenyao Liu, Lin Xia, Jinjiang Wang, and Yue Zhu  »View Author Affiliations


Chinese Optics Letters, Vol. 7, Issue 3, pp. 210-213 (2009)


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Abstract

Noise reduction is one of the most exciting problems in electronic speckle pattern interferometry. We present a homomorphic partial differential equation filtering method for interferometry fringe patterns. The diffusion speed of the equation is determined based on the fringe density. We test the new method on the computer-simulated fringe pattern and experimentally obtain the fringe pattern, and evaluate its filtering performance. The qualitative and quantitative analysis shows that this technique can filter off the additive and multiplicative noise of the fringe patterns effectively, and avoid blurring high-density fringe. It is more capable of improving the quality of fringe patterns than the classical filtering methods.

© 2009 Chinese Optics Letters

OCIS Codes
(070.6110) Fourier optics and signal processing : Spatial filtering
(120.6160) Instrumentation, measurement, and metrology : Speckle interferometry

Citation
Fang Zhang, Wenyao Liu, Lin Xia, Jinjiang Wang, and Yue Zhu, "Homomorphic partial differential equation filtering method for electronic speckle pattern interferometry fringes based on fringe density," Chin. Opt. Lett. 7, 210-213 (2009)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-7-3-210


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