Numerical investigation of error rates in rough particle sizing using interferometric out-of-focus imaging

M. Brunel (1) , M. Talbi (1) , L. Ouldarbi (1) , S. Coetmellec (1) , G. Gréhan (1)

1 CORIA - Complexe de recherche interprofessionnel en aérothermochimie

We realize a numerical investigation of error rates in rough particle sizing using interferometric out-of-focus imaging. We show that an automatic image processing based on a 2D-Fourier transform of the patterns enables size estimations with accuracy better than algorithms based on 2D-autocorrelation of the patterns. When ILIDS enables size determination of droplets whose out-of-focus images exhibit 2 or 3 bright fringes, we show that the minimum size measurable in the case irregular rough particles is around two or three times higher than for spherical droplets. © 2017 Elsevier GmbH

Mots clés: Drops; Image processing; Speckle; 2d fourier transforms; Automatic image processing; Irregular particle; Numerical investigations; Out-of focus image; Out-of-focus imaging; Size estimation; Spherical droplets; Interferometry

Domaines: Mécanique des fluides [physics.class-ph]

M. Brunel, M. Talbi, L. Ouldarbi, S. Coetmellec, G. Gréhan. Numerical investigation of error rates in rough particle sizing using interferometric out-of-focus imaging. Optik, 2017, 147, pp.204-213. ⟨10.1016/j.ijleo.2017.08.046⟩. ⟨hal-01611260⟩