Image processing apparatus and method therefor
US7990589B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2009 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Oct 13, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/52
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
When color materials of more than four colors are used, a signal for the amount of toner used within a range appropriate for the apparatus and toner characteristic is generated using a color separation table. However, a printer receives print data of various formats, such as image data separated into signal values of more than four colors, or image data of a special format to which a six-color separation table cannot be applied. Hence, an image signal representing a combination of colors is input. The sum of the signal values of colors in each pixel of the image signal is calculated and compared with a limit value. When the sum exceeds the limit value, the signal values of base colors are replaced with that of a spot color based on a replacement table for replacing the signal values of the base colors with that of the spot color.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.