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
(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
Enrique Tajahuerce, Osamu Matoba, and Bahram Javidi, "Shift-Invariant Three-Dimensional Object Recognition by Means of Digital Holography," Appl. Opt. 40, 3877-3886 (2001)