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:
Jan. 05, 2010
Filed:
Jul. 24, 2006
Tomohito Ishida, Sunto-gun, JP;
Isami Itoh, Mishima, JP;
Tetsuya Atsumi, Susono, JP;
Masatsugu Toyonori, Sunto-gun, JP;
Tomohito Ishida, Sunto-gun, JP;
Isami Itoh, Mishima, JP;
Tetsuya Atsumi, Susono, JP;
Masatsugu Toyonori, Sunto-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention further improves gradation characteristics from a highlight region to a high-density region. First, the correction processing receives image data, and an image attribute discrimination discriminates whether the data are related to a character/thin line or others on the basis of attribute information on a pixel of interest. If it is discriminated that the data are related to a character/thin line, a pattern matching to data stored in a line buffer is performed to obtain a pixel distance, and in accordance with the pixel distance, a correction amount is determined on the basis of an LUT set in a correction amount determination. Subsequently, on the basis of the determined correction amount, corrected image data are generated and output to the following step.