发明授权
US08112007B2 Image forming apparatus, tone correction method using tone patches and alignment markers, and computer-readable recording medium recorded with a tone correction program using tone patches and alignment markers
有权
图像形成装置，使用色调和对准标记的色调校正方法以及记录有使用色调和对准标记的色调校正程序的计算机可读记录介质
- 专利标题： Image forming apparatus, tone correction method using tone patches and alignment markers, and computer-readable recording medium recorded with a tone correction program using tone patches and alignment markers
- 专利标题（中）： 图像形成装置，使用色调和对准标记的色调校正方法以及记录有使用色调和对准标记的色调校正程序的计算机可读记录介质
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申请号： US12205351申请日： 2008-09-05
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公开(公告)号： US08112007B2公开(公告)日： 2012-02-07
- 发明人: Tetsuya Sakai , Soh Hirota , Masahiro Kouzaki , Takashi Harashima , Kazuomi Sakatani
- 申请人： Tetsuya Sakai , Soh Hirota , Masahiro Kouzaki , Takashi Harashima , Kazuomi Sakatani
- 申请人地址： JP Chiyoda-ku, Tokyo
- 专利权人： Konica Minolta Business Technologies, Inc.
- 当前专利权人： Konica Minolta Business Technologies, Inc.
- 当前专利权人地址： JP Chiyoda-ku, Tokyo
- 代理机构： Buchanan Ingersoll & Rooney PC
- 优先权： JP2007-235233 20070911
- 主分类号： G03G15/00
- IPC分类号： G03G15/00
摘要：
The present invention aims to provide an image forming apparatus and the like that perform a highly-accurate tone correction in a relatively short time and includes the following: a pattern former, with use of each image forming unit, on a sheet, forming tone patches in the main or sub scanning direction (41k,c,y,m) and aligning markers, which indicate positions of the tone patches, in the same direction as the tone patches (42k,c,y,m); a pattern reader reading the sheet with the tone patches and markers formed thereon; a coordinate determiner determining coordinates of the tone patches in the direction of the aligned tone patches based on the read markers (42k,c,y,m); a density determiner determining densities of the tone patches (41k,c,y,m) read based on the determined coordinates; and an updating part updating the tone correction table based on relationships between the determined densities and tone levels.