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:
Aug. 23, 2011
Filed:
Aug. 29, 2006
Applicant:
Tsutomu Sakaue, Yokohama, JP;
Inventor:
Tsutomu Sakaue, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 1/46 (2006.01);
U.S. Cl.
CPC ...
Abstract
When a halftone dot region includes a character or line drawing, high extraction performance of a halftone dot region cannot be obtained. Hence, the isolation amount of a pixel of interest is calculated, and the isolation amounts are integrated in a plurality of areas having different sizes. Thresholds set for respective areas are compared with the integration result to determine whether or not the pixel of interest belongs to a halftone dot region.