Method and apparatus for compressing image information
US6937651B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1999 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | Oct 3, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/181
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system (10) includes an image detector (12) which is a video camera, and which detects and outputs a succession of video images of a selected subject. A technique for processing these images involves preparing compressed image information. The compressed image information includes a first detected image (FIG. 2A) that serves as a reference image, includes information (FIG. 2G) identifying regions of subsequent detected images that differ from the first image, and excludes at least a portion of each of the subsequent images. The information identifying regions of subsequent detected images is free of contrast information for a substantial portion of each of those regions. The compressed image information for a given image is decompressed by displaying the reference image and by modifying the displayed reference image based on the information identifying differences from the reference image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.