Comparison of 3D sensing algorithms for single shot fringe projection profilometry

Abstract

Phase demodulation algorithms from single fringe pattern have been used widely due to their capability of sensing and measuring dynamic objects. In this paper, the comparison of single shot fringe demodulation algorithms for smooth and complex objects having discontinuities have been demonstrated. Fourier transform (FT) and windowed Fourier transform (WFT) algorithms have been used to extract the 3D phase from the modulated fringe pattern. Since, WFT uses Gaussian filter window at each pixel position to retrieve phase information, hence, it is suitable to extract phase for classifying objects having discontinuities, however due to spectrum leakage at discontinuities, FT causes error and are unable to detect correct phase information for such objects. The merits and demerits of both techniques have been discussed. © 2018 IEEE.