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:
Nov. 10, 2009
Filed:
Nov. 20, 2006
Jun Tamaru, Tokyo, JP;
Jun Tamaru, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A predetermined region set on a grayscale image is divided into rectangles each having a predetermined size (S), and piled patterns which hold the accumulated values of pixel values at identical pixel positions upon piling up the divided rectangles is generated (S). An alignment pattern is generated by calculating the logical sum of respective bit expression patterns (S). A peak position which matches the alignment pattern on the piled patterns best is obtained (S). The position of the predetermined region is corrected based on the peak position, and the predetermined region after correction is divided into rectangles each having the predetermined size (S) Patterns in the divided rectangles are recognized (S). Embedding information corresponding to each recognized pattern is specified (S).