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. 14, 2000
Filed:
Jul. 19, 1996
Koji Amemiya, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image processing apparatus includes a plurality of image forming units for performing image formation using predetermined colors. A pattern image is formed by outputting specific pattern data to each image forming unit, density of the pattern image is measured and the gradation correction characteristics are controlled in accordance with the measure density. By performing processing in units of colors corresponding to the image forming units, color image formation having good color balance and gradation characteristics is attained over a long period of time. By controlling gradation correction characteristics in consideration of the density obtained by actually outputting the pattern image onto a recording medium, and reading the pattern image, color image formation having good density reproducibility is realized.