An automatic method for three-dimensional (3-D) shape
recognition is proposed. It combines the Fourier transform
profilometry technique with a real-time recognition setup such as the
joint transform correlator (JTC). A grating is projected onto
the object surface resulting in a distorted grating pattern. Since
this pattern carries information about the depth and the shape of the
object, their comparison provides a method for recognizing 3-D objects
in real time. A two-cycle JTC is used for this
purpose. Experimental results demonstrate the theory and show the
utility of the new proposed method.
© 1999 Optical Society of America
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