Abstract

A threshold is added to recognize an input pattern that has too few similarities to be one of the memory patterns. A real-time pattern recognition system based on the improved model is given. The unipolar optical pattern recognition system has all the characteristics of a fully bipolar winner-take-all model and has illumination invariance. A liquid-crystal spatial light modulator is used as a real-time input device, and a mask and a lens array perform the threshold and weighted sums of the input pattern. Some experimental results are also shown.

© 1994 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Algorithm for optimizing bipolar interconnection weights with applications in associative memories and multitarget classification

Shengjiang Chang, Kwok-Wo Wong, Wenwei Zhang, and Yanxin Zhang
Appl. Opt. 38(23) 5032-5038 (1999)

Implementation of a polychromatic Hamming net for color image classification

Chii-Maw Uang, Francis T. S. Yu, Kyung-Tae Kim, and Xiangyang Yang
Appl. Opt. 33(23) 5443-5447 (1994)

Optical competitive learning with VLSI/liquid-crystal winner-take-all modulators

Kelvin Wagner and Timothy M. Slagle
Appl. Opt. 32(8) 1408-1435 (1993)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription