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:
Nov. 10, 2009
Filed:
Jul. 27, 2006
Ritsuko Otake, Kawasaki, JP;
Shinichi Kato, Kawasaki, JP;
Tsutomu Sakaue, Yokohama, JP;
Yoko Sato, Yokohama, JP;
Yoichi Kashibuchi, Tokyo, JP;
Ritsuko Otake, Kawasaki, JP;
Shinichi Kato, Kawasaki, JP;
Tsutomu Sakaue, Yokohama, JP;
Yoko Sato, Yokohama, JP;
Yoichi Kashibuchi, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
When color materials of more than four colors are used, a signal for the amount of toner used within a range appropriate for the apparatus and toner characteristic is generated using a color separation table. However, a printer receives print data of various formats, such as image data separated into signal values of more than four colors, or image data of a special format to which a six-color separation table cannot be applied. Hence, an image signal representing a combination of colors is input. The sum of the signal values of colors in each pixel of the image signal is calculated and compared with a limit value. When the sum exceeds the limit value, the signal values of base colors are replaced with that of a spot color based on a replacement table for replacing the signal values of the base colors with that of the spot color.