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:
Sep. 01, 2009
Filed:
Jul. 28, 2004
Thierry Cohignac, Paris, FR;
Frederic Guichard, Paris, FR;
Christophe Migliorini, Puteaux, FR;
Fanny Rousson, Paris, FR;
Thierry Cohignac, Paris, FR;
Frederic Guichard, Paris, FR;
Christophe Migliorini, Puteaux, FR;
Fanny Rousson, Paris, FR;
Vision IQ, Boulogne Billancourt, FR;
Abstract
The invention concerns a method and a system for detecting a body () in a zone () located proximate an interface (). The body is illuminated by an electromagnetic radiation () comprising at least two different wavelengths, located in ranges corresponding to near infrared and to green-blue. The method comprises the following steps: selecting two wavelengths; providing, for each of said wavelengths, an image () of the interface and of the zone; extracting from said data of each image two sets of data () respectively representing at least one part of the body in the near infrared range and in the green-blue range; comparing said data sets (). It is thus possible to detect the presence of a body by discriminating between a body entirely located beneath the interface and a body located at least partly above the interface.