Local feature based image compression
US9349072B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2013 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Apr 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The use of local feature descriptors of an image to generate compressed image data and reconstruct the image using image patches that are external to the image based on the compressed image data may increase image compression efficiency. A down-sampled version of the image is initially compressed to produce an encoded visual descriptor. The local feature descriptors of the image and the encoded visual descriptor are then obtained. A set of differential feature descriptors are subsequently determined based on the differences between the local feature descriptors of the input image and the encoded visual descriptor. At least some of the differential feature descriptors are compressed to produce encoded feature descriptors, which are then combined with the encoded visual feature descriptor produce image data. The image data may be used to select image patches from an image database to reconstruct the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.