Automated color adjustment
US8040560B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2008 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Jun 21, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/628
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for determining (250) a change required in a selected base point in an input colorant space of a digital-image rendering system to obtain from the digital-image rendering system a desired reference output color to within a predetermined color tolerance comprises determining the required change based on a local approximation of the colorant/color relationship at the selected base point. Gradient points are automatically generated (210) that are proximate or coincident with the selected base point and that are different from any other base point than the selected base point. A linear approximation to the colorant/color relationship at the selected base point is computed (240) from the gradient points and the measured (230) output colors at the gradient points as rendered (220) by the digital-image rendering system and. The required change is determined from the local gradient of the colorant/color relationship at the selected base point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.