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:
Aug. 13, 2002
Filed:
Apr. 30, 1998
Ritsushi Tanabe, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A printer system and method for printing a clear image. When black characters or characters printed in a black reverse are expanded, the contours thereof are printed in black only and the inside or the outside of the contours which are designated to be printed in black color are printed in the three colors such as magenta, cyan and yellow in half tone or in an pseudo-half tone as well as in black. Image data is expanded on a image memory according to instructions from a computer. A black-color determining unit determines whether or not the expanded image data includes a black pixel and an edge extracting unit extracts an edge pixel in the expanded image data. A selector selects a black color only for a black edge portion and selects other colors in a half tone or in a pseudo-half tone as well as in black for a black but non-edge portion. It outputs the image according to such selections to a color printer.