Calculating the spectral characteristics of the color resulting from overlaying colorants
US9347874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2013 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Jan 16, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6097
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of spectrally characterising an ink printed over another ink, and of calculating a spectral measure of reflectance of an overprint of a plurality of inks thus characterized. The method uses spectral measurements of a substrate. For an order of printing an overprint, for each ink, for a respective amount of printing of the ink, the method accepts or determines a respective interaction of absorption and reflection function (“IAR function”) indicative of how the ink interacts with a printed background and includes determining the spectral reflectance by repeatedly multiplying, in the order, for each additional ink added to a current background the spectral measure of the current background by exponentiation of the ratio of the spectral measure of the additional ink on the substrate to the spectral measure of the substrate, by the TAR function of the additional ink.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.