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期刊论文
Fourier transform profilometry: a review
Optics and Lasers in Engineering 35(2001)263-284,-0001,():
Fourier transform profilometry is one of the popular non-contact 3-D measurementmethods, where a Ronchi grating or sinusoidalgrating is projected onto a diffuse threedimensionalsurface,and the resulting deformed grating image is detected by a CCD cameraand processed by a computer. This method requires only one frame (or two frames) of thedeformed fringe pattern in some algorithms to retrieve the surface of measured object, so it hasobvious advantage for realtime data acquisition and 3-D measurement of dynamic process. Inthis paper, we review some algorithms in FTP, discuss some important problems, includingfrequency spectra overlapping, phase unwrapping, sampling, and 3-D measurement ofdynamic process. With the development of computer hardware and software and availabilityof high-resolution image grabber, FTP method will be a promising one for acquiring 3-D dataof object, and more and more researchers pay attention to it.
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