发明授权
- 专利标题: Method and apparatus for processing picture image signals
- 专利标题(中): 用于处理图像信号的方法和装置
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申请号: US906694申请日: 1986-09-11
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公开(公告)号: US4845550A公开(公告)日: 1989-07-04
- 发明人: Hitoshi Urabe , Tadashi Miyakawa , Osamu Shimazaki , Hisashi Kudo , Hideaki Kimura
- 申请人: Hitoshi Urabe , Tadashi Miyakawa , Osamu Shimazaki , Hisashi Kudo , Hideaki Kimura
- 申请人地址: JPX Kanagawa
- 专利权人: Fuji Photo Film Co., Ltd.
- 当前专利权人: Fuji Photo Film Co., Ltd.
- 当前专利权人地址: JPX Kanagawa
- 优先权: JPX57-62125 19820414; JPX57-63423 19820416
- 主分类号: G03F3/08
- IPC分类号: G03F3/08 ; H04N1/60
摘要:
A method and process for processing picture image signals detects color separation signals of a color original image and then respectively converts these color separation signals into digital color separation signals. These digital color separation signals are then multiplied by predetermined coefficients and the results of these multiplications are sequentially accumulated for equalizing the levels of the digital color separation signals at a grey point of the original image so as to thereby obtain digital color separation signals which are converted to equivalent neutral densities. Hue signals of yellow, green, cyan, blue, magenta, and red which divide a color space into six hues are obtained from the digital color separation signals which are converted to the equivalent neutral densities. The hue signals are multiplied by predetermined color correction coefficients and the results thereof accumulated for color correction signals on yellow, magenta, and cyan. The digital color separation signals which are converted to the equivalent neutral densities are added to the color correction signals so as to thereby obtain selective color correction signals for recording the original image.
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