Method and apparatus for correcting noise in a film scanner
US5784529A · kind A · utility
13Cited by
5References
31Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/253
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a film scanner, noise caused by fluctuations in the intensity of a light source 100 are corrected by taking a sample 175 of the light source and correcting the image read from, or written to, the film with respect to the sample. Preferably, the sample is routed around a film gate 105 and has a similar optical path as the image sample 125. In this way, noise due to variations in the optical path and additional electronics 185 may also be corrected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.