Yu Q
Appl Opt. 1988 Sep 15;27(18):3782-4. doi: 10.1364/AO.27.003782.
Two filtering algorithms-spin filter and binary spin filter-suitable for various digital interferometric images are presented in this paper. Both can filter out the noise in the interferometric patterns without distorting the fringe features, whereas other commonly used filters, such as median filter and FFT passband filter, may blur the patterns. A process for automatically extracting fringe centerlines all over the field is also proposed. This is done by using the spin filters mentioned above together with the derivative binary image. The effectiveness of this technique is illustrated experimentally.
本文提出了两种适用于各种数字干涉图像的滤波算法——自旋滤波器和二进制自旋滤波器。这两种滤波器都能滤除干涉条纹图案中的噪声，而不会扭曲条纹特征，而其他常用滤波器，如中值滤波器和傅里叶变换通带滤波器，可能会使图案模糊。本文还提出了一种自动提取全场条纹中心线的方法。这是通过将上述自旋滤波器与导数二值图像一起使用来实现的。通过实验验证了该技术的有效性。
