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. 09, 2008
Filed:
Jan. 07, 2004
Jian Wang, Beijing, CN;
Yingnong Dang, Beijing, CN;
Qiang Wang, Beijing, CN;
Liyong Chen, Beijing, CN;
Xiaoxu MA, Cambridge, MA (US);
Jian Wang, Beijing, CN;
Yingnong Dang, Beijing, CN;
Qiang Wang, Beijing, CN;
Liyong Chen, Beijing, CN;
Xiaoxu Ma, Cambridge, MA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
An efficient technique is provided for determining a portion of a document corresponding to a captured image. Areas of a document in which the pattern is at least partially obscured are identified. A reference pixel in the image is selected, and an offset between the pixel and the pattern is determined. A pixel-by-pixel comparison is then made of the image with the document such that the reference pixel is only compared with locations in the document that are both within the identified areas and have the determined offset from the pattern. The comparison with the highest correspondence between the image pixels and the electronic document then identifies the position of the reference pixel relative to the electronic document.