Multiple Matched Spatial Filter Performed With Nonsymmetrical Fourier Transformers

Carlos Ferreira; Carmen Vazquez

doi:10.1117/12.967306

1 January 1987 Multiple Matched Spatial Filter Performed With Nonsymmetrical Fourier Transformers

Carlos Ferreira, Carmen Vazquez

Proceedings Volume 0813, Optics and the Information Age; (1987) https://doi.org/10.1117/12.967306
Event: 14th Congress of the International Commission for Optics, 1987, Quebec, Canada

Abstract

Classical matched spatial filters (CMSF) have been successfully employed for optical pattern recog-nition. To detect different signals, multiple matched spatial filters can be synthesized and several methods to perform the filters have been developed. Based on the sensitivity to input orientation of CMSF, we proposed a filter [1] where the signals to be detected were rotated by different angles when recording the hologram. Thus, the recognition of a signal is only achieved when the input in the filtering system has been suitably rotated. The number of signals simultaneously recorded was limited by the angular tolerance of symmetrical correlators, of the order of ten degrees [2] for CMSF.

Citation Download Citation

Carlos Ferreira and Carmen Vazquez "Multiple Matched Spatial Filter Performed With Nonsymmetrical Fourier Transformers", Proc. SPIE 0813, Optics and the Information Age, (1 January 1987); https://doi.org/10.1117/12.967306

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