Coding and decoding method for images or videos
US9271006B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2014 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Nov 6, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/94
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A coding and decoding method for images or videos is provided by embodiments of the present invention to improve coding and decoding efficiency. The method includes: establishing a visual dictionary, wherein, the visual dictionary includes one or more visual words; extracting features from a specific object in an image; determining whether there is a visual word in the visual dictionary matching the specific object by using a feature matching method; obtaining the index of the visual word matched and a geometric relationship between the specific object and the visual word matched, wherein, the geometric relationship is represented by a project parameter; entropy coding the index of the visual word matched and the project parameter instead of entropy coding the specific object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.