Automatic white balance using histograms from subsampled image
US9787894B1 · kind B1 · utility
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16Claims
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Key dates
| Filing date | Mar 30, 2016 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Mar 30, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/88
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method includes receiving statistical image data for a set of image data. The statistical image data includes composite intensity metrics for each of a plurality of color channels for each of a plurality of cells of a subsampling grid. A histogram is generated for each of the color channels based on the composite intensity metrics. A gain for each of the color channels is determined based on the histograms. The gains for each of the color channels are applied to the set of image data. The set of image data is stored after applying the gains to generate an image data file.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.