Published: 31 December 2012

A robust scheme for the identification of centerlines of moiré fringes from optical experimental images

Paulius Palevicius1
Antanas Sudintas2
Algimantas Fedaravicius3
Jurate Ragulskiene4
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Abstract

A robust scheme for the identification of centerlines of moiré fringes from optical experimental images is proposed in this paper. The proposed computational algorithm comprises three basic steps: the thresholding of the experimental image, thinning of the projected grating based on morphological and mid-point detection rules and, finally, the reconstruction of the map of continuous curves from the binary matrix of pixels representing fringe centerlines. The first steps can be considered as adaptations of standard image processing techniques, while the identification and the reconstruction of continuous curves is the original contribution specifically developed for optical projection moiré images. The functionality of such an approach is demonstrated for a demanding optical experimental image.

About this article

Received
20 October 2012
Accepted
04 December 2012
Published
31 December 2012
Keywords
moiré fringes
centerline identification
pattern detection