Chirp-encoded optical processor for pattern recognition

Qing Tang; Bahram Javidi

doi:10.1117/12.160306

25 October 1993 Chirp-encoded optical processor for pattern recognition

Qing Tang, Bahram Javidi

Proceedings Volume 1959, Optical Pattern Recognition IV; (1993) https://doi.org/10.1117/12.160306
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

We describe a joint transform correlator in which the reference signal and the input scene are placed in different input planes along the optical axis. We show that this system will focus the off-axis cross-correlation functions and the on-axis autocorrelation functions in different output planes. In a conventional joint transform correlator, these terms are produced in the same output plane. The effect of placing the input scene and the reference signal in different input planes is mathematically analyzed. Computer simulations, and experimental results are presented to illustrate the performance of this correlator. We show that for the nonlinear joint transform correlator, the higher order correlation terms are produced in different output planes.

Citation Download Citation

Qing Tang and Bahram Javidi "Chirp-encoded optical processor for pattern recognition", Proc. SPIE 1959, Optical Pattern Recognition IV, (25 October 1993); https://doi.org/10.1117/12.160306

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available