Enhancement technology of the joint transform power spectrum

Chunjie Li; Fanghan Chen; Shibo Chu; Jiawei Zhao; Wensheng Wang

doi:10.1117/12.757513

4 January 2008 Enhancement technology of the joint transform power spectrum

Chunjie Li, Fanghan Chen, Shibo Chu, Jiawei Zhao, Wensheng Wang

Proceedings Volume 6837, Information Optics and Photonics Technologies II; 68371E (2008) https://doi.org/10.1117/12.757513
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

The joint transform correlator was an effective system for the target detection and recognition, major character was that the reference template and the target were simultaneous processed; Fourier transform was operated by Fourier transform lens with the speed of light; the joint transform power spectrum was obtained through the first Fourier transform, then got the correlation peaks through the second Fourier transform. The power spectrum of the joint transform correlator was recorded by the Charge Coupled Device (CCD) matrix camera. The contrast of the power spectrum was relatively lower, so some important information, such as the Young's interference fringes, were displayed very fuzzy, even couldn't see in some images, the output correlation peaks were seriously affected. For enhancing the power spectrum's contrast, the power spectrum may be filtered with the high-boost filtering. By filtering, the contrast of the Young's interference fringes was greatly improved and displayed relatively clear, so the contrast of the correlation peaks were greatly enhanced, the recognition ratio of the target detection and recognition by the joint transform correlator was increased. As the experiment examples, the target recognition of a car and a warship in cluttered scenes were presented. The experiments showed that the contrast of the Young's interference fringes was improved after the joint transform power spectrum was processed by the high-boost filtering. At the same time, the output correlation peaks were obviously enhanced too. So the high-boost filtering was very effective method for filtering in the joint transform power spectrum.

Citation Download Citation

Chunjie Li, Fanghan Chen, Shibo Chu, Jiawei Zhao, and Wensheng Wang "Enhancement technology of the joint transform power spectrum", Proc. SPIE 6837, Information Optics and Photonics Technologies II, 68371E (4 January 2008); https://doi.org/10.1117/12.757513

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