Method for determining the components of image noise patterns of an imaging device and use of this method in an imaging device
US6584233B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1999 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Jul 19, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and a computer program for determining at least one component of a noise pattern of an imaging device. The method comprises the steps of: providing flat field data; forming a preliminary estimate of banding components by computing one-dimensional averages of the flat field data and carrying out a Fourier analysis of the one dimensional averages; determining the banding components by carrying out a two-dimensional Fourier analysis of the original flat field data, and comparing the result to the preliminary estimate; removing the banding components from the flat field data, to obtain modified flat field data; forming a second preliminary estimate of streaking components by carrying out a Fourier analysis on the modified flat field data; determining the two-dimensional random noise statistics by carrying out a Fourier analysis on the modified flat field data; and determining the streaking components by modifying the preliminary estimate of the streaking components with the two-dimensional random noise statistics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.