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提出一种PMP中实用的基于快速傅里叶变换的相移校正算法，利用多采的一幅条纹图和自适应滤波，快速计算出当前相移值。采用该算法能实时准确地控制光栅的相移。
A practical phase shift correction algorithm based on Fast Fourier Transform (PFT) is proposed in this paper. The current phase shift value is calculated quickly by using a stripped pattern and adaptive filtering. The algorithm can control the phase shift of the grating in real time and accurately.