发明授权
US5485284A Image processing system for performing color image data calibration
失效
用于执行彩色图像数据校准的图像处理系统
- 专利标题： Image processing system for performing color image data calibration
- 专利标题（中）： 用于执行彩色图像数据校准的图像处理系统
-
申请号： US998863申请日： 1992-12-30
-
公开(公告)号： US5485284A公开(公告)日： 1996-01-16
- 发明人: Seita Shono , Akihiro Usami
- 申请人： Seita Shono , 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： JPX4-000112 19920106; JPX4-026424 19920213
- 主分类号： H04N1/60
- IPC分类号： H04N1/60 ; H04N1/56
摘要：
An image reading apparatus measures, color by color, an average transmission-density signal based upon image information obtained from a color original through which light is transmitted, converts the measured average transmission-density signal of every color into a subject-lightness signal of every color, and effects a conversion into a reference color stimulus signal, which is indicated by the apex of a triangle substantially circumscribed by a spectrum locus of a predetermined chromaticity diagram, based upon the converted subject-lightness signal of every color.