Removal of poisson false color noise in low-light images usng time-domain mean and variance measurements
US7570833B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 20, 2006 |
| Grant date | Aug 4, 2009 |
| Priority date | — |
| Expiry date | Oct 5, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed are an image processing method capable of effectively removing noise contained in an image photographed in a low light environment by using statistical information, and a system thereof. There is provided an image processing method for an image consecutively inputted per frame unit, the method comprising: a step of segmenting the image into unit areas comprising a predetermined number of pixels; a first step of dividing each unit area into a low light region or a high light region by using the brightness of image data contained in said each unit area; a second step of outputting statistical information from image data contained in at least one unit area divided into the low light region, and detecting and removing Poisson and photon counting noise on the basis of the statistical information, the statistical information being the mean of the unit area; a third step of detecting a motion pixel from the image data; and a fourth step of detecting and removing false color noise from the image data on the basis of the detected motion pixel and the statistical information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.