Signal processing method and apparatus for producing interpolated chrominance values in a sampled color image signal
US4642678A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1986 |
| Grant date | Feb 10, 1987 |
| Priority date | — |
| Expiry date | Feb 3, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2209/046
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A signal processing method and apparatus for processing a sampled color image signal of the type having luminance values and chrominance values representing a highly sampled luminance component and less highly sampled chrominance components to produce interpolated chrominance values between sampled chrominance values is characterized by producing hue values at neighboring chrominance component sample locations as a function of a luminance value and the chrominance value at the neighboring locations; producing a signal representing an interpolated hue value as a function of neighboring hue values; and producing a signal representing an interpolated chrominance value as a function of the interpolated hue value and a luminance value at the interpolated location. The signal processing method reduces color fringing in an image reproduced from the sampled image signal without introducing unwanted hue shifts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.