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:
Feb. 01, 2011
Filed:
Nov. 08, 2007
Eric Lap Min Cheung, Epping, AU;
Stephen Farrar, Telopea, AU;
Nicole Ai Ling Lam, Lane Cove, AU;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Disclosed is a method of decoding a first barcode and a second barcode, different from the first barcode. The barcodes have typically been printed on a page and are derived from image scanning. The first barcode comprises a plurality of marks modulated about a first grid to redundantly encode data and the second barcode comprising a plurality of marks modulated about a second grid. The method estimates () the first grid from a bitmap representation () of at least a portion of the page, using modulated marks contained therein. The method determines () a first barcode region from the first grid, the first barcode region being a portion of the first barcode, followed by estimating a second grid from the bitmap representation, using modulated marks contained therein. The method determines a second barcode region from the second grid, the second barcode region being a portion of the second barcode, and then decodes () the first and second barcode regions using the first and second grids respectively to derive the first and second barcodes.