Apparatus and method for enhancement of video images
US4636850A · kind A · utility
21Cited by
13References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1984 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Sep 7, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/50
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for producing digital video images provides for obtaining a first image (42) and a second image (44), and subtracting the first from the second to obtain a difference image (46). The intensity of the difference image is increased relative to the first image (48). The enhanced difference image is added to the first image (50). The result is an image which emphasizes changes between the first and second images, while preserving enough common background to provide a frame of reference from which to view the changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.