[Automatic contrast limiting circuit and method thereof with spatial domain infinite impulse response filter]
US7324165B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2004 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | Jun 16, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An automatic contrast limiting circuit and method thereof with spatial domain infinite impulse response filter are disclosed. A spatial domain infinite impulse response filter is adapted to generate an output value of the spatial domain infinite impulse response filter related to an input signal. A peak value detector is adapted to detect the peak output value of the spatial domain infinite impulse response filter during a predetermined recording interval. A contrast evaluator is used to evaluate the required contrast value referring to a predetermined threshold value and the output value of the spatial domain infinite impulse response filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.