We present a technique for performing three-dimensional (3D) pattern recognition by use of in-line digital holography. The complex amplitude distribution generated by a 3D object at an arbitrary plane located in the Fresnel diffraction region is recorded by phase-shifting interferometry. The digital hologram contains information about the 3D object's shape, location, and orientation. This information allows us to perform 3D pattern-recognition techniques with high discrimination and to measure 3D orientation changes. Experimental results are presented.
© 2000 Optical Society of America
(090.1760) Holography : Computer holography
(100.0100) Image processing : Image processing
(100.4550) Image processing : Correlators
(100.5010) Image processing : Pattern recognition
(100.6890) Image processing : Three-dimensional image processing
Bahram Javidi and Enrique Tajahuerce, "Three-dimensional object recognition by use of digital holography," Opt. Lett. 25, 610-612 (2000)