Method of creating 4x4 LUTs using a source and destination ICC profile
US8368977B2 · kind B2 · utility
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Key dates
| Filing date | Mar 9, 2006 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Dec 7, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A 4×4 LUT comprises a K to K LUT merged with a CMYK to CMYK LUT with values ranging from [0, 0, 0, 0] to [0, 0, 0, 255], said 4×4 LUT written to a known file format. A method for creating 4×4 look up tables (LUTs) uses the source and destination ICC profiles. A K to K LUT is built, a CMYK to CMYK LUT is built, the K to K LUT is merged with the CMYK to CMYK LUT, and the resulting LUT is written to a known file format. Such a process is important since it solves the issue of preserving K in a CMYK to CMYK transform while adding the performance improvement of a 4×4 LUT.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.