Image processing apparatus and method
US8300150B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2009 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Dec 19, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus includes a pixel difference calculator, a summing unit, a determining unit, and an output unit. The pixel difference calculator receives a present image having first pixels and a previous image having second pixels, calculates pixel differences between corresponding first and second pixels, and outputs positive and negative pixel difference values. The summing unit obtains a first output value by adding up those of the positive pixel difference values and a second output value by adding up those of the negative pixel difference values. The determining unit determines a noise level of the present image from the first and second output values, and outputs a blended value. The output unit adds together weights of pixels at the same positions of the present and previous images according to the blended value to generate an output image. An image processing method is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.