Research on the anti-noise ability of phase extraction in 3D reconstruction of fringe projection
For the three-dimensional reconstruction of static diffuse reflection objects,una-voidable noise interference is one of the important factors affecting fringe projection three-di-mensional reconstruction.Phase-shifting profilometry,Fourier transform profilometry and wavelet transform profilometry are introduced in this study,and their anti-noise capabilities are analyzed and compared.The research found that the phase error of phase-shifting method is the smallest in the three-dimensional reconstruction of fringe images with and without noise interference.When the fringe image does not contain noise interference,the phase er-ror of Fourier transform method and wavelet transform method are similar,both greater than the phase error of phase-shifting method.When the fringe image contains noise inter-ference,the root mean square error(RMSE)of the two-dimensional wavelet transform pro-filometry based on the direct maximum ridge is reduced by 45.88%and 58.41%respectively compared with the RMSE of the one-dimensional wavelet transform profilometry based on the direct maximum ridge and the RMSE of Fourier transform profilometry.The phase error of the wavelet ridge extraction algorithm based on the evaluation function is much smaller than that of the wavelet ridge extraction algorithm based on the maximum ridge.It further confirms that the noise resistance of using Fan wavelet is superior to using Morlet wavelet.This provides a reference for the selection of phase algorithms for different scenarios of fringe projection profilometry(FPP).
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维普
