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:
Oct. 27, 2009
Filed:
Apr. 17, 2003
Applicant:
Christel-loïc Tisse, Plan de Cuques, FR;
Inventor:
Christel-Loïc Tisse, Plan de Cuques, FR;
Assignee:
STMicroelectronics S.A., Montrouge, FR;
Primary Examiner:
Int. Cl.
CPC ...
G06K 9/00 (2006.01); G06T 1/00 (2006.01); G06T 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and a circuit for determining the orientation of ridges of a digital image representing a fingerprint or the like, including for each image pixel, calculating a quantity taking into account the neighboring pixels in all directions, and of bidirectionally scanning the image line by line.