Efficient under color removal
US7202974B2 · kind B2 · utility
1Cited by
35References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 15, 2003 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | May 4, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6022
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of performing color space conversion and under color removal. Pixelated data is first resampled (102) to an efficient word size—typically 8-bits wide. The RGB color format data words are then subtracted from a maximum intensity to yield CMY color format data words. The minimum value of the three intensity words for each pixel is determined and used as an initial black value. A scaled version of the initial black value is then subtracted from each of the four CMYK intensity words (104). The resulting CMYK values are then limited to a range bounded by the maximum and minimum producible intensities for each color.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.