发明名称 |
Image reading apparatus for detecting noise in image data |
摘要 |
An image reading apparatus includes: three line sensors mutually spaced in a sub scanning direction; a platen arranged between the original and the three line sensors; a mover moving the platen relative to the three line sensors at a rate relative to the three line sensors, the rate being different from that of the original relative to the three line sensors; a lightness difference detector extracting a feature pixel having a predetermined feature from each of three data output from the three line sensors; and NOR and AND devices comparing the three data corresponding to a single location on the original to detect the feature pixel extracted from one of the three data, as a noise pixel if the feature pixel is not a feature pixel for the other data. |
申请公布号 |
US7675656(B2) |
申请公布日期 |
2010.03.09 |
申请号 |
US20040012184 |
申请日期 |
2004.12.16 |
申请人 |
KONICA MINOLTA BUSINESS TECHNOLOGIES, INC. |
发明人 |
ISHIGURO KAZUHIRO;SUZUKI HIROYUKI;TORIYAMA HIDEYUKI |
分类号 |
H04N1/46;H04N1/38 |
主分类号 |
H04N1/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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