Significant scene detection and frame filtering for a visual indexing system using dynamic thresholds
US6496228B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1999 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Nov 4, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video indexing system analyzes contents of source video and develops a visual table of contents using selected images. A system for detecting significant scenes detects video cuts from one scene to another, and static scenes based on DCT coefficients and macroblocks. A keyframe filtering process filters out less desired frames including, for example, unicolor frames, or those frames having a same object as a primary focus or one primary focuses. Commercials may also be detected and frames of commercials eliminated. The significant scenes and static scenes are detected based on a threshold which is set based on the category of the video.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.