System and method for content-based querying using video compression format
US6906719B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2002 |
| Grant date | Jun 14, 2005 |
| Priority date | — |
| Expiry date | Dec 11, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/50
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A visual query system, and associated method and computer program product enhance and accelerate content-based querying, and present a new image similarity measure using known or available software applications and hardware components of video compression systems. The present system encodes images as consecutive frames in a video sequence and uses the ratio between the file length of the compressed sequence and the original file length as a distance measure. The system considers the compression ratio to be an estimate of the entropy of the combined images, which can be used to estimate the amount of new information introduced from one image to the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.