Method for removing streaks from a scanned image
US7453587B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2005 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Jul 9, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for removing streaks from a scanned image includes performing a scanner light source OFF scan to generate a dark image having M rows of pixels and N+W columns of pixels; generating a line noise profile for the N columns of pixels of the dark image; performing a scanner light source ON scan to generate a regular image having M rows of pixels and N+W columns of pixels; processing the W columns of pixels of the regular image to detect a magnitude of the streak in the regular image; use the magnitude of the streak and the line noise profile to predict an amount of dark noise removal for each of the N columns of pixels of the regular image at the location of the streak; and subtracting the predicted amount of dark noise removal for each of the N columns of pixels from the respective N columns of pixels of the regular image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.