Invention Grant
US08208171B2 Image reading apparatus and method to prevent image erasing due to erroneously line-shaped noise detection
有权
用于防止由于错误的线状噪声检测而导致的图像擦除的图像读取装置和方法
- Patent Title: Image reading apparatus and method to prevent image erasing due to erroneously line-shaped noise detection
- Patent Title (中): 用于防止由于错误的线状噪声检测而导致的图像擦除的图像读取装置和方法
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Application No.: US12332176Application Date: 2008-12-10
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Publication No.: US08208171B2Publication Date: 2012-06-26
- Inventor: Hiroaki Kubo , Nobuhiro Mishima
- Applicant: Hiroaki Kubo , Nobuhiro Mishima
- Applicant Address: JP Tokyo
- Assignee: Konica Minolta Business Technologies, Inc.
- Current Assignee: Konica Minolta Business Technologies, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Morrison & Foerster LLP
- Priority: JP2008-087847 20080328
- Main IPC: G06F15/00
- IPC: G06F15/00 ; G06K9/34
Abstract:
The present invention aims to prevent a problem that an image on a document sheet is erased due to misdetection of a line-shaped noise. A copy machine 1 compares RGB values of a target pixel with averaged RGB values (Step S103). If only one of the RGB values has a difference that is greater than a prescribed value Ref2 (Step S103: YES), the copy machine 1 extracts the target pixel as a line-shaped noise pixel, and moves to a line-shaped noise correction (Step S108) while holding the address of the target pixel in a line-shaped noise address storing area 49b. If two of the RGB values have differences (Step S103: NO, Step S104: YES) and a difference between these two of the RGB values is no greater than a prescribed value Ref3 (Step S105: YES), the copy machine 1 extracts the target pixel as a line-shaped noise pixel, and moves to the line-shaped noise correction (Step S108) while holding the address of the target pixel in the line-shaped noise address storing area 49b.
Public/Granted literature
- US20090244663A1 IMAGE READING APPARATUS AND IMAGE READING METHOD Public/Granted day:2009-10-01
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