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:
Oct. 24, 1995
Filed:
Sep. 21, 1993
Rintaro Nakane, Yokohama, JP;
Jiro Egawa, Yokosuka, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
According to an image forming apparatus and method of the present invention, an image of an original is read by an image reader unit, a correction of gradation reproduction or a pseudo gradation processing is provided to the read image data by an image processing section. When an image corresponding to the image-processed image data is printed out on a sheet material, a gradation chart for image forming conditions is outputted, a number of gradations corresponding to the image forming conditions, the image forming conditions corresponding to the number of gradations are detected, and a test pattern for gradation reproduction is outputted based on the detected image forming condition is outputted. The test pattern is read again by the image reader unit. Newly read gradation data and gradation data of the test pattern are compared with each other, and correction data for every gradation of the plurality of the gradation is calculated. The corrected data is calculated a predetermined number of times and stored, so that an average value is renewed.