Abstract
The quality enhancement of a single fringe pattern is a challenging task in speckle interferometry. Fringe patterns suffer greatly from three adverse variations (nonuniform background, speckle noise, and intensity modulation). In this Letter, we propose a three-layer filtering strategy for noisy fringe patterns. The first layer is aimed at high-frequency speckle noises and low-frequency background. The second layer is for remaining speckle noises distributed in the middle-frequency band. The third layer will further implement quality enhancement by a phase-recovery technique. The proposed strategy is quantitatively evaluated by different indexes and verified to be effective through numerous comparative experiments.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Xinjun Zhu, Zhanqing Chen, and Chen Tang
Opt. Lett. 38(3) 275-277 (2013)
Maciej Trusiak, Krzysztof Patorski, and Maciej Wielgus
Opt. Express 20(21) 23463-23479 (2012)
J. C. Estrada, M. Servin, and J. L. Marroquín
Opt. Express 15(5) 2288-2298 (2007)