发明授权
- 专利标题: Image processing apparatus capable of detecting specific originals
- 专利标题(中): 能够检测特定原稿的图像处理装置
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申请号: US358144申请日: 1994-12-16
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公开(公告)号: US5832112A公开(公告)日: 1998-11-03
- 发明人: Masahiro Funada , Katsuyoshi Maeshima , Masanori Yamada , Yasumichi Suzuki , Yoichi Takaragi , Takeshi Aoyagi , Koichi Ishimoto
- 申请人: Masahiro Funada , Katsuyoshi Maeshima , Masanori Yamada , Yasumichi Suzuki , Yoichi Takaragi , Takeshi Aoyagi , Koichi Ishimoto
- 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: JPX5-328031 19931224; JPX5-330442 19931227; JPX5-348460 19931227
- 主分类号: H04N1/00
- IPC分类号: H04N1/00 ; G06K9/00
摘要:
A color image processing apparatus that prevents counterfeiting by detecting specific originals with high precision. Although general banknotes have graphic patterns drawn on uniform density portions, the tonality percepted by human eye is the mixture of the tonality of a graphic portion and the tonality of a uniform density portion. In consideration of the mixed tonality sensed by human eye, the apparatus smoothes a read image signal to generate mixed tonality for judgment, thus improves judgment precision. The total judgment of existence/absence of specific original is made by performing m judgments on m (m>n) judging conditions using the tonality data of pre-registered n (n: positive integer) specific originals.
公开/授权文献
- US4983593A Pharmaceutical composition of dihydropyridine compound 公开/授权日:1991-01-08