Adaptive image enhancement system
US4334244A · kind A · utility
45Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1980 |
| Grant date | Jun 8, 1982 |
| Priority date | — |
| Expiry date | Jul 28, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image enhancement system in which a running average of a group of digitized samples of a video signal and a median of a group of digitized samples are processed to form a gradient sample. The gradient sample is scaled in response to the noise level of the video signal. The gradient samples, average samples, and medium samples are combined by a processor which generates a corresponding sequence of output samples that are converted into an enhanced video signal from which an image is produced. The processor provides image edge enhancement for high gradients while providing increased noise filtering for low gradients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.