An improved windowed Fourier transform filter algorithm

被引：23
|
作者：
Zhao, Ran [1 ]
Li, Xinglong [1 ]
Sun, Ping [1 ]
机构：
[1] Shandong Normal Univ, Coll Phys & Elect, Jinan 250014, Peoples R China
来源：
OPTICS AND LASER TECHNOLOGY | 2015年 / 74卷
关键词：
Image processing; ESPI; Windowed Fourier transform; Fringe analysis; FRINGE PATTERNS; ESPI;
D O I：
10.1016/j.optlastec.2015.06.005
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In order to reduce the speckle noise in fringe patterns obtained by Electric Speckle Pattern Interferometry (ESPI), an improved windowed Fourier transform filter algorithm was proposed. The amplitude maximum of the fringe frequency scanned across a given window is set as the filtering criterion, which the optimum frequency image is obtained and the threshold window is not set in the window Fourier filter algorithm. The proposed algorithm is used to filter the fringe patterns obtained by ESPI. Experiment results show that the proposed algorithm has a better performance in reducing the speckle noise and has a high precision in phase calculation. The proposed algorithm can be used to filter other image as a low-pass filter. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：103 / 107
页数：5
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