Optimizing the discrimination capabilities of the joint transform correlator for a product validation application

Nicholas J. New; Tim D. Wilkinson; William A. Crossland

doi:10.1117/12.381586

31 March 2000 Optimizing the discrimination capabilities of the joint transform correlator for a product validation application

Nicholas J. New, Tim D. Wilkinson, William A. Crossland

Author Affiliations +

Proceedings Volume 4043, Optical Pattern Recognition XI; (2000) https://doi.org/10.1117/12.381586
Event: AeroSense 2000, 2000, Orlando, FL, United States

Abstract

The implementation of a compact Joint Transform Correlator designed for use in a production line validation system is presented. The application demands that the system is capable of capturing and examining printed product codes. The effects of applying non-linear processing techniques on the Input Plane and Joint Power Spectrum stages of the system are detailed, including morphological filtering. A subtraction technique is presented to further remove noise and unwanted cross-correlation terms from the Joint Power Spectrum. Installation of a CMOS camera into the system to replace the currently used CCD model is proposed offering a vastly expanded dynamic range. A technique for allowing the use of poor quality spectra is also presented which removes some of the sensitivity to noise and imperfections in the JPS.

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Nicholas J. New, Tim D. Wilkinson, and William A. Crossland "Optimizing the discrimination capabilities of the joint transform correlator for a product validation application", Proc. SPIE 4043, Optical Pattern Recognition XI, (31 March 2000); https://doi.org/10.1117/12.381586

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