Method of processing signals and apparatus for signal processing
US6798462B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2000 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Sep 8, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/646
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus operates to process signal samples in a form of color reference signal samples representative of at least part of a color video image to produce legal color signal samples representing a legal color version of the image. The apparatus comprises a color conversion processor arranged to receive the input signal samples and which operates to convert the color reference signal samples from a unipolar form, to bipolar form on a scale between two maxima having opposite polarity, an adjustment factor generator, which operates to generate a plurality of adjustment factors which when combined with the input signal samples have an effect of converting illegal color pixels of the color image into legal color pixels, and a color legalizer coupled to the adjustment factor generator, which operates to combine the adjustment factors with the input signal samples to produce the legalized color signal samples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.