基本信息:
- 专利标题： Method of and apparatus for obtaining tone curve
- 专利标题（中）：用于获取音调曲线的方法和装置
- 申请号：EP90120425.5 申请日：1990-10-24
- 公开(公告)号：EP0424920A3 公开(公告)日：1992-04-08
- 发明人： Kishida, Yoshihiro, Dainippon Screen Mfg. Co. Ltd.
- 申请人： Dainippon Screen Mfg. Co., Ltd.
- 申请人地址： 1-1, Tenjinkitamachi Teranouchi-Agaru 4-chome Horikawa-Dori Kamikyo-ku Kyoto 602 JP
- 专利权人： Dainippon Screen Mfg. Co., Ltd.
- 当前专利权人： Dainippon Screen Mfg. Co., Ltd.
- 当前专利权人地址： 1-1, Tenjinkitamachi Teranouchi-Agaru 4-chome Horikawa-Dori Kamikyo-ku Kyoto 602 JP
- 代理机构： Goddar, Heinz J., Dr.
- 优先权： JP277396/89 19891025
- 主分类号： H04N1/40
- IPC分类号： H04N1/40
摘要：
A plurality of reference tone curves are previously determined. An operator divides an original image into image regions and selects respective reference tone curves (f₁(x), f₂(x)) for the image regions. The operator designates weight values (w₁,w₂) for the respective reference tone curves. A weighted average of the respective reference tone values is calculated with the weight values to obtain a tone curve (fd(x)) employed for converting the gradation of the original image.
公开/授权文献:
- EP0424920B1 Method of and apparatus for obtaining tone curve 公开/授权日：1995-12-13