Empirical Mode Decomposition Profilometry: small scale capabilities and comparison to Fourier Transform Profilometry

LAGUBEAU, GUILLAUME; COBELLI, PABLO JAVIER; BOBINSKI, TOMAS; MAUREL, AGNES; PAGNEUX, VINCENT; PETITJEANS, PHILIPPE

CABA

Workshop; LIA Physics and Mechanics of Fluids (FMF/PMF) Mid-term assesment days; 2015

Laboratorio Internacional Asociado Franco-Argentino en Fisica y Mecanica de Fluidos (LIA-PMF)

We present the Empirical Mode Decomposition Profilometry (EMDP) for the analysis of fringe projection profilometry images. It is based on an iterative filter, using empirical mode decomposition, that is free of spatial filtering and adapted for surfaces characterized by a broadband spectrum of deformation. Its performances are compared to Fourier Transform Profilometry (FTP), being the benchmark of fringe projection profilometry. We show both numerically and experimentally that using EMDP improves strongly the profilometry small scale capabilities. Moreover, the height reconstruction distortion is much lower: the reconstructed height field is now both spectrally and statistically accurate. EMDP is thus particularly suited to quantitative experiments.