Hybrid Optical Correlator for Pattern Recognition

Introduction

Pattern recognition involves identification of a reference pattern in a collection of input patterns. Optical correlators play a crucial role in the development of pattern recognition systems. A hybrid optical correlator incorporates the parallel processing capabilities of optical systems and the ruggedness and accuracy of electronic systems. A prototype compact optical correlator has been developed for machine vision applications. The system has been developed with commercially available components such as laser diode, spatial light modulators (SLM) and CCD cameras, controlled by personal computer. The architectures of joint-transform correlation and matched filter correlation are simultaneously incorporated in the prototype, which has been tested for fingerprint identification applications.

Special Features:

Real-time identification of targets, Video-rate operation, PC based user interface

Prospective Users:

Product inspection industry, access control monitoring, forensic science, automatic target tracking, autonomous vehicle guidance, satellite imagery, printed circuit board inspection, textile defect detection, detection of specific cells in biological tissues.

Keywords:

Pattern recognition, optical correlator, machine vision

Type of Technology:

Instrument

Contact:

Managing Director
Foundation for Innovation and Technology Transfer (FITT)
Indian Institute of Technology, Delhi
Hauz Khas, New Delhi-110016, INDIA
Tel : 91-011-26597167, 26857762, 26581013, 26597153
Fax : 91-011-26851169
E-mail : drkdpn@gmail.com