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:
Dec. 16, 2008
Filed:
Dec. 16, 2005
Applicants:
Hiroshi Tanaka, Tochigi, JP;
Takuji Maruta, Tochigi, JP;
Inventors:
Hiroshi Tanaka, Tochigi, JP;
Takuji Maruta, Tochigi, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A position detection method of detecting a position of a detection mark. The method includes a matching step of calculating a value of a correlation using a template for an image including the detection mark, a change step of changing the template to be used for the correlation, a repeat step of, when a value of a correlation in the matching step is not more than a predetermined value, changing the matching processing while changing the template in the change step, and a step of performing position detection on the basis of a result of correlation in the matching step or the repeat step.