Invention Grant
US08576466B2 Image processing apparatus and image processing method that correct color conversion table used when reading document
有权
图像处理设备和图像处理方法，用于校正读取文档时使用的颜色转换表
- Patent Title: Image processing apparatus and image processing method that correct color conversion table used when reading document
- Patent Title (中): 图像处理设备和图像处理方法，用于校正读取文档时使用的颜色转换表
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Application No.: US12695831Application Date: 2010-01-28
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Publication No.: US08576466B2Publication Date: 2013-11-05
- Inventor: Asako Hashizume
- Applicant: Asako Hashizume
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2009-034174 20090217
- Main IPC: G03F3/08
- IPC: G03F3/08
Abstract:
Conventionally, it is not possible to evenly correct a color conversion table of a reading device in the entire color region even with a limited number of patches. In order to correct a color conversion table, a color conversion table from a device-independent color space into a device-independent color space is newly stored. A shift in read data between devices is reflected in a correction 3D-LUT and a color conversion table is corrected using the correction 3D-LUT. Thereby, it is possible to correct the entire color region with a smaller number of pieces of data and with less time and effort than when a color conversion table is newly recreated.
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