학술논문
Profile measurement of objects by using stockwell and continuous wavelet transforms
Document Type
Conference
Author
Source
2008 IEEE 16th Signal Processing, Communication and Applications Conference Signal Processing, Communication and Applications Conference, 2008. SIU 2008. IEEE 16th. :1-4 Apr, 2008
Subject
Language
ISSN
2165-0608
Abstract
In this study, 3D profile measurements of objects are tested with integral transforms by using a standard fringe projection technique consisting of a CCD (charge-coupled device) camera and a projector. The surface profile of a rough object is studied experimentally with crossed optical axes geometry. A two dimensional fringe pattern by introducing the carrier frequencies in two spatial directions, x and y, is analyzed with S-transform and continuous wavelet transform based on Morlet wavelet algorithms. Phase gradient and phase methods are presented for continuous wavelet transform (CWT) and S-transform of the fringe pattern. At the end, results of experimental application of these techniques are compared.