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Öğe Two-dimensional fringe projection for three-dimensional shape measurements by using the CWT phase gradient method(2011) Yilmaz, O. Kocahan; Özder, S.; Demir, P.This paper describes an optical measurement technique for the two-dimensional fringe pattern (by introducing the carrier frequencies in two spatial directions x and y) by the continuous wavelet transform (CWT) phase gradient method. Such transforms based on the Morlet and Paul wavelets have been applied to image rows and columns one by one and then added to find the final phase distribution, without using any unwrapping algorithms. This technique is compared with the S-transform phase gradient method. Numerical simulations and actual experiments are carried out to show the validity of this technique for finding the phase distributions. © 2011 Allerton Press, Inc.
