Asymmetric image verification for security optical systems based on a joint transform correlator architecture

Hsuan T. Chang; Ching T. Chen

doi:10.1117/12.502652

23 October 2003 Asymmetric image verification for security optical systems based on a joint transform correlator architecture

Hsuan T. Chang, Ching T. Chen

Author Affiliations +

Proceedings Volume 5202, Optical Information Systems; (2003) https://doi.org/10.1117/12.502652
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Conventional optical image verification systems based on the joint transform correlator (JTC) can only recover symmetric images in the output plane, which is an limitation to practical usage. In this paper, an optical asymmetric-image verification system based on the JTC is proposed. An additional phase mask is attached with a spatial light modulator (SLM), which displays the joint power spectrum as the amplitude information, to enable the reconstruction of an asymmetric image in the output plane. Two phase functions are paired and iteratively retrieved by the use of the projection onto constraint sets algorithm. One key is one of the joint functions in the input plane and acts as the key. The other phase is attached by the SLM. Compared with the image verification system based on the JTC architecture, the proposed system can obtain the asymmetric images in the output plane. In addition, the the proposed architecture can also yield the better image quality for symmetric images. Simulation results are given to verify the proposed method.

Citation Download Citation

Hsuan T. Chang and Ching T. Chen "Asymmetric image verification for security optical systems based on a joint transform correlator architecture", Proc. SPIE 5202, Optical Information Systems, (23 October 2003); https://doi.org/10.1117/12.502652

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Fourier transforms

Spatial light modulators

Image restoration

Optical correlators

Image quality

Joint transforms

Charge-coupled devices

Show All Keywords

Keywords/Phrases

Search In:

Publication Years