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The change of the V channel satisfies the given cosine function and contains the phase information of the non-center point of the fringe. But after the pattern is modulated by the object, the originally stable signal changes. As a non-stationary signal processing method, the wavelet transform method has been introduced into many signal processing fields, including phase extraction from fringe patterns. Comprehensive comparison of one-dimensional and two-dimensional window Fourier transform, wavelet transform and other methods, for the consideration of reconstruction accuracy and speed, the one-dimensional wavelet transform method is selected. The generalized Morse wavelet has flexible time-frequency local characteristics and strict analysis, and the effect of measuring the 3D contour of the object is better than the popular complex Morlet wavelet as the mother wavelet
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Tang1705
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