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:
Aug. 02, 2011
Filed:
Oct. 12, 2005
Nicolas Rudaz, Veyras, CH;
Martin Kutter, Remaufens, CH;
Fred Jordan, Les Paccots, CH;
Jean-claude Gilles, Frankfurt am Main, DE;
Pierre Durant, Frankfurt am Main, DE;
Nicolas Rudaz, Veyras, CH;
Martin Kutter, Remaufens, CH;
Fred Jordan, Les Paccots, CH;
Jean-Claude Gilles, Frankfurt am Main, DE;
Pierre Durant, Frankfurt am Main, DE;
European Central Bank, Frankfurt am Main, DE;
Abstract
A method to generate a security pattern to be embedded in an original image has the particularity that the detection of the security pattern can be achieved through a simple, low processing capability device. The method for generating a security image comprising the original image and the security pattern is characterized in that the security pattern is formed by an inverse transform of the combination in the frequency domain of an auxiliary image and a radially symmetric, two-dimensional pattern, said two-dimensional pattern created by sweeping a self-similar, one-dimensional function along a 360-degree arc, and the security image is generated by the modulation of at least one color of at least a part of the original image with the pattern.