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. 13, 2009
Filed:
Mar. 30, 2006
Yuji Konno, Kawasaki, JP;
Hisashi Ishikawa, Urayasu, JP;
Hiroshi Tajika, Yokohama, JP;
Miyuki Fujita, Tokyo, JP;
Norihiro Kawatoko, Kawasaki, JP;
Tetsuya Edamura, Kawasaki, JP;
Tetsuhiro Maeda, Kawasaki, JP;
Yuji Konno, Kawasaki, JP;
Hisashi Ishikawa, Urayasu, JP;
Hiroshi Tajika, Yokohama, JP;
Miyuki Fujita, Tokyo, JP;
Norihiro Kawatoko, Kawasaki, JP;
Tetsuya Edamura, Kawasaki, JP;
Tetsuhiro Maeda, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
When recording a gradation pixel by performing pseudo-halftone processing, the occurrence of unevenness in the density in the recorded image is suppressed. For that purpose, when recording a pseudo-halftone image using dot patterns, a dot-pattern table storing a plurality of different dot patterns is provided for each gradation value. One dot-pattern table is selected from N dot-pattern tables based on gradation-value information for each pixel. One dot pattern is selected from the selected dot-pattern table, based on position information indicated by the pixel, and recording is performed using the selected dot pattern. It is thereby possible to prevent the concentrated use of a particular nozzle of a recording head, and suppress the occurrence of unevenness in the density due to characteristics of the specific nozzle.