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提出了一种基于S变换引导的自适应窗口傅里叶变换相位提取方法。通过连续S变换,得到局部条纹的最佳变换窗口,可以保证窗口尺寸随变形条纹的频率变化而自动调整,适合复杂物体的面形测量。计算机模拟和实验验证表明,该方法克服了传统窗口傅里叶变换窗口大小固定的缺点,相位提取的误差由-2～8rad降低为-1～1rad,而且还可以得到被测物体的调制度,引导相位展开。
An adaptive window Fourier transform phase extraction method based on S transform is proposed. Through the continuous S transform, the optimal transformation window of the local fringes can be obtained, which can ensure that the size of the window is automatically adjusted according to the frequency variation of the fringe fringes, which is suitable for the measurement of the complex objects. Computer simulation and experimental verification show that this method overcomes the shortcomings of the traditional window Fourier transform window size fixed, the error of phase extraction is reduced from -2 ~ 8rad to -1 ~ 1rad, but also the modulation degree of the measured object, Guided phase expansion.