Method and apparatus for reducing image noise
US7116837B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2002 |
| Grant date | Oct 3, 2006 |
| Priority date | — |
| Expiry date | Dec 14, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image reduction method and apparatus to digitize and process an image signal. Level values a to h of peripheral pixels of a pattern, the level value of a watched pixel, and the value of a reference level Θ are input. The level value o of the watched pixel is a gain set value α, and added with the level values a to h output from the output ports of a selection circuit and supplied to a divider. The gain set value a is added with a value output from the selection circuit and supplied to the divider. The degree of signal processing is set by a ε-filter and the rate of watched pixels relating to the averaging operation is controlled and thereby, optionally setting the degree of signal processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.