发明名称 |
Image reading and copying using plural illumination sources having different characteristics |
摘要 |
An image reading apparatus includes, as an arrangement for discriminating a specific image with high precision, first illumination means for illuminating an object image so as to perform a normal reading operation, second illumination means for illuminating the object image with light having characteristics different from those of the light from the first illumination means so as to discriminate whether or not the object image is a specific image, and means for adjusting the quantity of light emitted from the first and second illumination means.
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申请公布号 |
US5650863(A) |
申请公布日期 |
1997.07.22 |
申请号 |
US19950449373 |
申请日期 |
1995.05.24 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
UTAGAWA, TSUTOMU;ARIMOTO, SHINOBU;YOSHINAGA, KAZUO;HAYASHI, TOSHIO;NAKAI, TAKEHIKO;NAGASE, TETSUYA;SASANUMA, NOBUATSU |
分类号 |
G03G21/04;G07D7/12;G07D7/16;G07D7/20;H04N1/00;(IPC1-7):H04N1/40 |
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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