发明名称 |
Specific document determining apparatus, image reading apparatus, specific document determining method, and a computer-readable recording medium with a program for execution of the method stored therein image reading apparatus having a specific document |
摘要 |
The present specific document determining apparatus according to the present invention comprises a microwave sensor for irradiating a microwave to and scanning a document, detecting a reflected portion of the irradiated microwave, outputting a first detection signal, again irradiating a microwave and scanning the document after the document is placed on a contact glass, detecting a reflected portion of the irradiated microwave, and outputting a second detection signal; a signal processing section for using the first detection signal as a reference signal and comparing a level of the reference signal to a level of the second detection signal to make determination as to whether metallic fiber is included in the document or not, and a controller for making determination as to whether the document is a specific one or not according to a result of determination by the signal processing section.
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申请公布号 |
US6025603(A) |
申请公布日期 |
2000.02.15 |
申请号 |
US19970957737 |
申请日期 |
1997.10.24 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
HASEGAWA, YUTAKA;UKAI, TAKESHI;YAMAGATA, HIDEAKI;OHTSUBO, KAZUHISA;MAEDA, MAMORU |
分类号 |
G03G21/04;G07D7/10;G07D7/20;H04N1/00;(IPC1-7):G06K5/00 |
主分类号 |
G03G21/04 |
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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