An adaptive phase-input joint transform correlator for pattern recognition is presented. The input of the system is two phase-only images: input scene and reference. The reference image is generated with a new iterative algorithm using phase-only synthetic discriminant functions. The algorithm takes into account calibration lookup tables of all optoelectronics elements used in optodigital experiments. The designed adaptive phase-input joint transform correlator is able to reliably detect a target and its distorted versions embedded into a cluttered background. Computer simulations are provided and compared with those of various existing joint transform correlators in terms of discrimination capability, tolerance to input additive noise, and to small geometric image distortions. Experimental optodigital results are also provided and discussed.
© 2007 Optical Society of America
Original Manuscript: April 9, 2007
Revised Manuscript: July 4, 2007
Manuscript Accepted: July 5, 2007
Published: September 5, 2007
Victor H. Diaz-Ramirez and Vitaly Kober, "Adaptive phase-input joint transform correlator," Appl. Opt. 46, 6543-6551 (2007)