Spatial phase stepping method of fringe-pattern analysis
Spatial phase stepping method of fringe-pattern analysis
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DOI：
10.1016/0143-8166(95)90976-j
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发表时间：
1995
影响因子：
4.6
通讯作者：
P. Chan;P. Bryanston-Cross;S.C Parker
中科院分区：
文献类型：
--
作者：
P. Chan;P. Bryanston-Cross;S.C Parker
提出了一种新的空间相移条纹分析方法。SPS结合了相移的计算简单性和傅里叶变换方法的单幅图像分析能力。该技术的工作原理是将线性化的条纹图案细分为三个分量图像，根据三个分量图像通过三相步长算法计算相位。已经进行了计算机模拟，以验证该理论并使系统误差分析成为可能。此外，用SPS程序对两个实验跨音速流场进行了数值求解，并与傅里叶变换方法的计算结果进行了比较。
A new method of fringe-pattern analysis by spatial phase stepping (SPS) is presented. SPS combines the computational simplicity of phase stepping with the single image analysis capability of the Fourier transform method. The technique works by subdividing a linearised fringe pattern into three component images, from which the phase is calculated by a three phase step algorithm. A computer simulation has been undertaken to demonstrate the theory and enable an analysis of systematic errors. In addition, two experimental transonic flow fields are solved by SPS and a comparison is made with results derived using the Fourier transform method.