发明授权
US5386305A Color imaging processing method and apparatus for suppressing color blurs
失效
彩色成像处理方法和抑制颜色模糊的装置
- 专利标题: Color imaging processing method and apparatus for suppressing color blurs
- 专利标题(中): 彩色成像处理方法和抑制颜色模糊的装置
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申请号: US35968申请日: 1993-03-23
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公开(公告)号: US5386305A公开(公告)日: 1995-01-31
- 发明人: Akihiro Usami
- 申请人: Akihiro Usami
- 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: JPX4-068055 19920326
- 主分类号: B41J2/525
- IPC分类号: B41J2/525 ; G06T1/00 ; H04N1/46 ; H04N1/60 ; G03F3/08
摘要:
A color image processing method and apparatus in which reproducibility of gray color is improved. UCR processing and black color density extraction processing are performed so as to compensate homogeneity of gray color by changing the setting of UCR and black color toner/ink amount in an intermediate density area and high density area. When brightness (RGB) image signals are converted into density (YMCBk) image signals, in the masking UCR circuit 406-2, UCR and black color toner/ink amount is increased in the intermediate density area, while UCR is reduced in the high density area. Or UCR and black color toner/ink amount is increased in the intermediate density area and achromatic area of the intermediate density area is expressed only by the black component, while the UCR is reduced in the high density area. Corresponding density image signals are thus converted.
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