Fourier transform profilometry for the automatic measurement of 3-D object shapes.

@article{Takeda1983FourierTP,
  title={Fourier transform profilometry for the automatic measurement of 3-D object shapes.},
  author={Mitsuo Takeda and Ken-ichiro Mutoh},
  journal={Applied optics},
  year={1983},
  volume={22 24},
  pages={3977}
}
A new computer-based technique for automatic 3-D shape measurement is proposed and verified by experiments. In contrast to the moire contouring technique, a grating pattern projected onto the object surface is Fourier-transformed and processed in its spatial frequency domain as well as in its space-signal domain. This technique has a much higher sensitivity than the conventional moire technique and is capable of fully automatic distinction between a depression and an elevation on the object… CONTINUE READING
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Modulation Systems and Noise (Prentice-Hall, Englewood Cliffs, N.J

See, for example, J. J. Downing
The authors thank T. Yatagai of Tsukuba University for his helpful discussions • 1964
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