Galizzi Gustavo E, Federico Alejandro, Kaufmann Guillermo H
Appl Opt. 2017 May 20;56(15):4412-4418. doi: 10.1364/AO.56.004412.
We test the performance of a phase recovery method based on a three-dimensional directional wavelet transform applied to the intensity signal measured by temporal speckle pattern interferometry (TSPI). We present and discuss several sources of uncertainty by analyzing experimental datasets recorded for an in-plane interferometer without introducing a temporal carrier. The dynamic phase data measured with the proposed method are compared with those obtained from the well-known one-dimensional Fourier transform phase recovery technique. In the Fourier method, the filtered Fourier transform for each intensity pixel is evaluated along the temporal direction. In contrast, the three-dimensional directional wavelet transform method uses the information of adjacent pixels and then increases the performance of the recovered dynamic phase results. The advantages and limitations of the three-dimensional directional wavelet transform approach are discussed, and a summary of conclusions from the analysis of TSPI data is also given.
我们测试了一种基于三维方向小波变换的相位恢复方法的性能，该方法应用于通过时间散斑图案干涉测量法（TSPI）测量的强度信号。我们通过分析为平面干涉仪记录的实验数据集来呈现和讨论几个不确定性来源，且未引入时间载波。将用所提出的方法测量的动态相位数据与从著名的一维傅里叶变换相位恢复技术获得的数据进行比较。在傅里叶方法中，沿着时间方向评估每个强度像素的滤波傅里叶变换。相比之下，三维方向小波变换方法使用相邻像素的信息，从而提高了恢复的动态相位结果的性能。讨论了三维方向小波变换方法的优点和局限性，并给出了对TSPI数据分析得出的结论总结。
