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:
Sep. 11, 2001
Filed:
Nov. 18, 1999
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A printing apparatus prints an image by one head formed by adhering a plurality of print heads each having a plurality of nozzles in the main scanning direction. An image correction apparatus for the printing apparatus includes a printer, reader, correction coefficient calculation unit, image correction unit, and smoothing unit. The printer prints a predetermined correction chart so as to ensure a partially overlapping region in a region printed by main scanning of the print heads. The reader reads a printed image of the predetermined correction chart printed by the printer. The correction coefficient calculation unit calculates a predetermined correction coefficient on the basis of the printed image of the predetermined correction chart read by the reader. The image correction unit performs predetermined image correction in advance for printing image signals input to the print heads, on the basis of the predetermined correction coefficient calculated by the correction coefficient calculation unit. The smoothing unit performs, for the printing image signals input to the print heads, signal processing for smoothing in advance a density value at a portion corresponding to the overlapping region with respect to a density value at a portion other than the portion corresponding to the overlapping region.