Image encoding/decoding method and device using color coordinate axis conversion
US11528491B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2019 |
| Grant date | Dec 13, 2022 |
| Priority date | — |
| Expiry date | Oct 23, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/85
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is image encoding/decoding method using color coordinate axis conversion, comprising the steps of: acquiring pixel distribution information, on first color coordinate system, about an image; determining, on the basis of the pixel distribution information, first component having the widest variance from among the components of the first color coordinate system; acquiring an intermediate color coordinate system by rotating, around a starting point, a coordinate axes of the first color coordinate system so that variance of the first component is maximized; determining a second component having the widest variance from among components excluding the first component in the intermediate color coordinate system; acquiring a second color coordinate system by rotating, around the starting point, a coordinate axis of the intermediate color coordinate system so that variance of the second color component is maximized; and encoding the image on the basis of pixel distribution information on the second color coordinate system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.