Method and apparatus for adjusting the contrast of an image
US8000551B2 · kind B2 · utility
5Cited by
16References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2007 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Jun 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/208
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus adjusts the contrast of an input image formed of pixels. Each pixel in the input image has an input brightness level. At least some of the pixels in the output or enhanced image have an output brightness level that is different from their input brightness level. Brightness level data of the input image is filtered to obtain a high frequency component of the input image in a single operational stage. The high frequency component is amplified. The original image and the amplified high frequency component are summed to produce brightness level data of the output image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.