光子学报, 2014, 43 (9): 0912008, 网络出版: 2014-10-23   

无阈值窗口傅里叶变换滤波法

Non-threshold Windowed Fourier Filter Algorithm
作者单位
山东师范大学 物理与电子科学学院, 济南 250014
摘要
为减少噪音对散斑相位图的影响, 提出了一种无阈值的窗口傅里叶变换滤波方法.通过对窗口内条纹频率幅值扫描, 寻找条纹频率幅值的最大值作为滤波标准, 得到最佳滤波图像, 缩短了计算时间, 解决了窗口傅里叶变换滤波中需要设定阈值的问题.在无阈值窗口傅里叶变换滤波算法基础上, 对散斑条纹图像进行了滤波, 证明了该算法的可行性和良好的滤波效果, 可用于各类条纹图像的低通滤波.
Abstract
In order to reduce the speckle noise in phase distribution of deformation, a non-threshold windowed Fourier filter algorithm was proposed.The maximal amplitude of stripe frequency is set as the filtering criterion by scanning the amplitude of stripe frequency in the window, which the optimum frequency image is obtained and the threshold window is not set in the window Fourier filter algorithm. And the proposed algorithm is used on the fringe patterns. Experiment results show that the proposed algorithm have a better performance in reducing the speckle noise and a high precision in phase calculation. The algorithm proposed can be used to filter other images as a low-pass filter.
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李兴龙, 李峰, 赵冉, 孙平. 无阈值窗口傅里叶变换滤波法[J]. 光子学报, 2014, 43(9): 0912008. LI Xing-long, LI Feng, ZHAO Ran, SUN Ping. Non-threshold Windowed Fourier Filter Algorithm[J]. ACTA PHOTONICA SINICA, 2014, 43(9): 0912008.

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