Laser-diode-based joint transform correlator for fingerprint identification

Amit K. Lal; De Yu Zang; James E. Millerd

doi:10.1117/1.602063

1 January 1999 Laser-diode-based joint transform correlator for fingerprint identification

Amit K. Lal, De Yu Zang, James E. Millerd

Optical Engineering, Vol. 38, Issue 1, (January 1999). https://doi.org/10.1117/1.602063

A laser-diode-based joint transform correlator (JTC) is reported here for the identification and discrimination of fingerprints. The system employs compact and inexpensive laser diodes as the light sources and a bacteriorhodopsin (BR) film in the Fourier plane, which can record the joint power spectrum without the need for expensive spatial light modulators or CCD cameras. The BR film also introduces nonlinearities in the Fourier plane which can improve JTC performance. In addition, real-time, all-optical programmable spatial filtering is demonstrated to improve the discrimination of the system. We present computer modeling and experimental results of this optical correlator, which shows excellent potential for the identification and discrimination of fingerprints.

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Amit K. Lal, De Yu Zang, and James E. Millerd "Laser-diode-based joint transform correlator for fingerprint identification," Optical Engineering 38(1), (1 January 1999). https://doi.org/10.1117/1.602063

Published: 1 January 1999

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