Method and system in a digital image processing chain for adjusting a colour balance, corresponding equipment, and software means for implementing the method
US7616811B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2004 |
| Grant date | Nov 10, 2009 |
| Priority date | — |
| Expiry date | Jun 18, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10024
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method in a digital image processing chain adjusts for a colour balance. In the method, the subject is imaged by pixels to form value-sets of the colour components, component-specific histograms are formed from the value-sets of the colour components, cumulative histograms are formed from the component-specific histograms, the illumination colour corresponding to at least one colour component is defined from the cumulative histograms, and using target colour and defined illumination colour are defined for at least two colour components, a gain factor adjusts the colour balance. In addition, a corresponding system, equipment, and software means implement the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.