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. 09, 2001
Filed:
Feb. 13, 1998
Marc Viala, Guyancourt, FR;
Laurent Letellier, Fontenay-aux-Roses, FR;
Commissariat A L'Energie Atomique, Paris, FR;
Abstract
An attempt is made to localize an object (,) with marks (,) in space, using a video camera (,). A search is made for traces of the marks (,) on the image, to deduce the directions of the marks (,) in the camera (,) view field and the position of the object (,). The algorithm used includes a step in which marks are approximately located by simple formulas, and then a step in which the estimate is improved by an error minimization calculation. Traces are modeled on the image to determine their position with high accuracy, better than the resolution pitch of the camera (,) which therefore does not need to give a very sharp image. The marks (,) are preferably passive marks and may or may not be reflecting, and do not emit any light. The system is not very sensitive to parasite lighting.