We present an optoelectronic method to analyze three-dimensional
(3D) scenes that is able to detect the presence, and also the
position and orientation, of a reference 3D object. The
data-acquisition procedure is based on digital holography. A
phase-shifting interferometer records a single digital Fresnel hologram
of the 3D scene with an intensity-recording device. Holographic
information of the 3D reference object is also obtained with the same
method. Correlation techniques are then applied to recognize the
presence and position of the 3D reference object in the 3D
scene. The technique also allows us to detect the 3D reference with
a small out-of-plane rotation. Preliminary experimental results are
presented that demonstrate the theory.
© 2001 Optical Society of America
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