The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2003
Filed:
Apr. 27, 1999
Thomas J. Grycewicz, Fremont, CA (US);
The United States of America as represented by the Secretary of the Air Force, Washington, DC (US);
Abstract
In a binary joint transform correlator, a Fourier plane binarization threshold is provided which alternates between even and odd rows and reduces noise in the output plane and improves discrimination between matched and unmatched prints. Periodically correlating with a known standard input and normalizing the output peak intensity prevents correlator performance drift from degrading fingerprint recognition performance. Experimental system performance is assessed statistically, in terms of the false pass rate seen when operating with a constant false alarm rate. By applying both techniques, a false pass improvement from 6.95% to 0.076% is experimentally demonstrated at a false alarm rate of 0.1 percent.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile