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. 25, 2007
Filed:
Mar. 14, 2003
Akitoshi Yamada, Kanagawa, JP;
Hiromitsu Hirabayashi, Kanagawa, JP;
Kentaro Yano, Kanagawa, JP;
Masao Kato, Kanagawa, JP;
Kazuya Imafuku, Kanagawa, JP;
Akitoshi Yamada, Kanagawa, JP;
Hiromitsu Hirabayashi, Kanagawa, JP;
Kentaro Yano, Kanagawa, JP;
Masao Kato, Kanagawa, JP;
Kazuya Imafuku, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an image processing apparatus which performs an error diffusion process to multivalued image data consisting of plural density components and outputs a result of the error diffusion process, the process result from a first error diffusion unit performing the error diffusion process based on a density value of a first density component included in the plural density components or the process result from a second error diffusion unit performing the error diffusion process based on the density value of the first density component and a density value of at least one density component included in other density components is selected according to a predetermined condition. Thus, even in an image process is performed to a larger number of gradations, a high-speed process can be achieved with simple structure, and the error diffusion process can be effectively performed to a shift of dot apply positions.