发明授权
US5650863A Image reading and copying using plural illumination sources having
different characteristics
失效
使用具有不同特性的多个照明源的图像读取和复制
- 专利标题： Image reading and copying using plural illumination sources having different characteristics
- 专利标题（中）： 使用具有不同特性的多个照明源的图像读取和复制
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申请号： US449373申请日： 1995-05-24
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公开(公告)号： US5650863A公开(公告)日： 1997-07-22
- 发明人: Tsutomu Utagawa , Shinobu Arimoto , Kazuo Yoshinaga , Toshio Hayashi , Takehiko Nakai , Tetsuya Nagase , Nobuatsu Sasanuma
- 申请人： Tsutomu Utagawa , Shinobu Arimoto , Kazuo Yoshinaga , Toshio Hayashi , Takehiko Nakai , Tetsuya Nagase , Nobuatsu Sasanuma
- 申请人地址： JPX Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX4-286348 19921023; JPX4-286349 19921023; JPX4-286380 19921023; JPX4-286381 19921023
- 主分类号： G03G21/04
- IPC分类号： G03G21/04 ; G07D7/12 ; G07D7/16 ; G07D7/20 ; H04N1/00 ; H04N1/40
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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