Gamma correction for three-dimensional object measurement by phase measuring profilometry

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

17 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)5534-5538
Journal / PublicationOptik
Volume126
Issue number24
Online published15 Sep 2015
Publication statusPublished - Dec 2015

Abstract

For structured light technique using commercial digital projector, gamma distortion is an inevitable factor affects the accuracy and resolution of the final measurement result seriously. This paper presents a gamma correction method based on the response function of the whole system, which is calculated from the input and output grayscale, and then the actual projected fringe patterns could be got. Through projecting these corrected fringes, the measurement error induced by gamma distortion would be reduced. At the same time, a low-pass filter has been designed to eliminate the residual high order harmonics in the deformed fringe patterns captured by a camera, in the basis of a mathematical model of the high order harmonics which are caused by gamma nonlinearity. Both computer simulation and experiment have been conducted to demonstrate the validity of this method.

Research Area(s)

  • Filter, Gamma correction, Higher-order harmonics, Phase measuring profilometry, Response function

Citation Format(s)

Gamma correction for three-dimensional object measurement by phase measuring profilometry. / Ye, Xu; Cheng, Hao-Bo; Wu, Heng-Yu; Zhou, Dong-Mei; Tam, Hon-Yuen.

In: Optik, Vol. 126, No. 24, 12.2015, p. 5534-5538.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review