Generalized Morse wavelets for the phase evaluation of projected fringe pattern

KOCAHAN YILMAZ Ö., COŞKUN E., ÖZDER S.

MEASUREMENT SCIENCE AND TECHNOLOGY, vol.25, no.10, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 25 Issue: 10
  • Publication Date: 2014
  • Doi Number: 10.1088/0957-0233/25/10/105701
  • Journal Name: MEASUREMENT SCIENCE AND TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: wavelet transforms, fringe analysis, phase measurement, FOURIER-TRANSFORM PROFILOMETRY, ANALYTIC WAVELETS, DISPERSION
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

Generalized Morse wavelets are proposed to evaluate the phase information from projected fringe pattern with the spatial carrier frequency in the x direction. The height profile of the object is determined through the phase change distribution by using the phase of the continuous wavelet transform. The choice of an appropriate mother wavelet is an important step for the calculation of phase. As a mother wavelet, zero order generalized Morse wavelet is chosen because of the flexible spatial and frequency localization property, and it is exactly analytic. Experimental results for the Morlet and Paul wavelets are compared with the results of generalized Morse wavelets analysis.