Three-dimensional profiling with binary fringes using phase-shifting interferometry algorithms

Gastón A. Ayubi, J. Matías Di Martino, Julia R. Alonso, Ariel Fernández, César D. Perciante, José A. Ferrari

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Three-dimensional shape measurements by sinusoidal fringe projection using phase-shifting interferometry algorithms are distorted by the nonlinear response in intensity of commercial video projectors and digital cameras. To solve the problem, we present a method that consists in projecting and acquiring a temporal sequence of strictly binary patterns, whose (adequately weighted) average leads to a sinusoidal fringe pattern with the required number of bits. Since binary patterns consist of "ones" and "zeros"-and no half-tones are involved-the nonlinear response of the projector and the camera will not play a role, and a nearly unit contrast gray-level sinusoidal fringe pattern is obtained. Validation experiments are presented.

Original languageEnglish
Pages (from-to)147-154
Number of pages8
JournalApplied Optics
Volume50
Issue number2
DOIs
StatePublished - 10 Jan 2011

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