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:
Jun. 01, 2004
Filed:
Oct. 20, 1997
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/00 ;
U.S. Cl.
CPC ...
G06K 9/00 ;
Abstract
Black correction to character, lines, and the like, is performed smoothly so as to maintain quality of an image as much as possible. In a character thickness determining circuit of a black character determination unit , the thickness of characters and lines are determined based on RGB signals. Further, character/line outline information is obtained at an edge detector , and chromaticity information is obtained at a chromaticity determining unit . When an image processing is performed based on the combination of the outline information and the chromaticity information, a thickness determination signal is corrected so that the thickness of the character, lines, and like changes continuously.