3D profile measurement of an object is studied experimentally by using a standard fringe projection technique
consisting of a CCD camera and a digital projector. The height profile of the object is calculated through the phase
change distribution of the projected fringes with two dimensional fringe pattern by introducing the carrier frequencies in
two spatial directions, x and y. The phase distribution is extracted from the optical fringe pattern by using S-transform
gradient and S-transform phase methods. Experimental result for the Fourier transform profilometry algorithm is
compared with the results of the S-transform analysis.
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