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:
Dec. 01, 2009
Filed:
Oct. 27, 2006
Naoto Yamada, Kawasaki, JP;
Naoto Yamada, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Recent copying machines have higher image quality, and the halftone processing methods are diversifying. If automatic tone correction is applied in correspondence with the diversified halftone processing methods, a long operation time is required. Hence, a sample chart based on the sample data is formed by a printer. A reader acquires image data of the sample chart, and the tone correction characteristics of a density correction unit corresponding to the image processing are updated based on the image data of the sample chart. In this case, generation of sample charts and updating of the tone correction characteristics are controlled in accordance with a user instruction as to whether or not to execute batch update processing of the tone correction characteristics of the density correction unit corresponding to the plurality of halftone processing methods.