Invention Grant
US08810823B2 Image reading device, an image forming apparatus, and methods for detecting dirt in document reading positions
有权
图像读取装置，图像形成装置以及检测文件读取位置中的污物的方法
- Patent Title: Image reading device, an image forming apparatus, and methods for detecting dirt in document reading positions
- Patent Title (中): 图像读取装置，图像形成装置以及检测文件读取位置中的污物的方法
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Application No.: US13868795Application Date: 2013-04-23
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Publication No.: US08810823B2Publication Date: 2014-08-19
- Inventor: Akira Shimatani
- Applicant: KYOCERA Document Solutions Inc.
- Applicant Address: JP
- Assignee: KYOCERA Document Solutions Inc.
- Current Assignee: KYOCERA Document Solutions Inc.
- Current Assignee Address: JP
- Agency: McDonnell Boehnen Hulbert & Berghoff LLP
- Priority: JP2012-098226 20120423
- Main IPC: G06F3/12
- IPC: G06F3/12 ; G06F15/00 ; G06K1/00 ; H04N1/40 ; H04N1/04 ; H04N1/409
Abstract:
An image reading device includes a changed-pixel detection unit and a determination unit. The changed-pixel detection unit detects, from image data read by the image reading unit, a changed pixel having a pixel value that differs from that of an adjacent pixel in the main scanning direction. The pixel value may differ by more than a predetermined value. The changed-pixel detection unit detects the position of the changed pixel in the main scanning direction. The determination unit determines that image data corresponding to positions of the changed pixel for the image data obtained by reading the document corresponds to a foreign image. The positions are consecutive in the sub-scanning direction. The positions of the changed pixel are detected for the image data obtained by reading the document and the image data obtained by reading the white guide member.
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