A numerical spatial carrier for single fringe pattern analysis algorithm

Numerical Investigation of Phase Estimation for 3D Measurement in the Fringe Projection Technology

“…This is certainly due to the fact that the phase distribution is slowly variable and it presents small spatial frequencies values that are very affected by noise and especially in the presence of multiplicative one. Figure 5 shows the effect of the modulation rate [11] of the projected fringe pattern via the RMS error of accuracy of retrieved phase map. The RMS deviation of the measured phase, for 4 different β values, increases with the object spatial frequency increment β.…”

The application of line imaging velocimetry to provide high resolution spatially resolved velocity data in plate impact experiments

“…The application of wavelet analysis to complex analytic signals is described by Li et al [5] and Bahich et al [6]. Wavelet analysis is a convolution process involving dilations and translations of a mother wavelet within a signal.…”

“…The work described here is concerned with the analysis of single camera line-VISAR fringes that are recorded for a period lasting typically 3 μs-4 μs. Historically line-VISAR has benefited from similar work in the field of 2D fringe pattern analysis, the most significant advancement being the introduction of Fourier analysis by Tekada [4] and more recently the continuous wavelet transform (CWT) [5,6].…”