Invention Grant
- Patent Title: Image forming apparatus employing a forgery discrimination pattern
- Patent Title (中): 采用伪造鉴别模式的图像形成装置
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Application No.: US10922954Application Date: 2004-08-23
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Publication No.: US07710610B2Publication Date: 2010-05-04
- Inventor: Shinji Katagiri , Yoichiro Maebashi
- Applicant: Shinji Katagiri , Yoichiro Maebashi
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2003-307184 20030829
- Main IPC: H04N1/40
- IPC: H04N1/40 ; G03F3/08
Abstract:
An image forming apparatus includes an image forming unit adapted to form images of a plurality of colors in a manner in which a predetermined pattern of a predetermined color is registered thereon and superimpose those images to form a color image, a controller configured to control the image forming unit so as to form a patch image of each color for density detection, and a detector configured to detect the density of each of the patch images. The controller controls the image forming unit so as to superimpose the predetermined pattern of the predetermined color upon the patch image of a predetermined color and not to superimpose the predetermined pattern of the predetermined color upon the patch images of the other colors.
Public/Granted literature
- US20050046691A1 Image forming apparatus Public/Granted day:2005-03-03
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