Method and apparatus for polar display of composite and RGB color gamut violation
US6828981B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 2000 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Oct 11, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/462
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Video signal sample data that has three values in one color space definition can produce values that are out of range in another color space definition, namely color gamut errors. The invention produces a polar plot with superimposed or added color difference and/or primary color values as a function of hue, as in a vectorscope, but values that when combined by conversion or transcoding may produce gamut errors are combined in the inventive display. Thus, excursion over or under a predetermined limit value identifies the gamut error. The display includes or is switchable between color difference and primary color color space definition variables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.