Experimental study of the different kind of filters used in correlation filtering

C. Vazquez

doi:10.1117/12.2308585

26 July 1993 Experimental study of the different kind of filters used in correlation filtering

C. Vazquez

Proceedings Volume 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology; 19834M (1993) https://doi.org/10.1117/12.2308585
Event: 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 1993, Budapest, Hungary

Abstract

An experimental comparative study of different filters used in correlation filtering technique for pattern recognition is presented. One of the main problems related to this technique are the low luminous level of the correlation signal and its width. So, the experimental study has been performed in order to obtain the best combination width - luminous level of the correlation signal. The narrowest signal is obtained using quasi-inverse filters but the diffraction efficiency is very low. These quasi-inverse filters have been obtained, in a first step, using photographic emulsions by bleaching methods, including recent post-heat treatment and S.H.S. G. technique. In a second step, the quasi-inverse filters are recorded on dichromated gelatin and then the efficiency increases and the width of the correlation signals decreases with respect to the previous cases. The study has been partly performed when the signal to be detected a) lies on a uniform background; b) is superposed to a speckle field; and c) is disturbed by the presence of additive gaussian noise.

Citation Download Citation

C. Vazquez "Experimental study of the different kind of filters used in correlation filtering", Proc. SPIE 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 19834M (26 July 1993); https://doi.org/10.1117/12.2308585

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