Abstract
A novel method for three-dimensional shape recognition is
proposed. It combines the Fourier-transform-profilometry technique
with a two-dimensional fractional correlation algorithm. A grating
is projected onto the object surface, resulting in a distorted grating
pattern that carries information about the height and the shape of the
object. Three-dimensional objects are recognized by a fractional
correlator by use of the transformed complex amplitude. An
optoelectronic hybrid implementation is also suggested.
© 2001 Optical Society of America
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