Film scanner which doubly scans to correct for film speed and position errors
US5475423A · kind A · utility
7Cited by
2References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1993 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | Nov 29, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/253
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a film scanner for optically scanning a film for obtaining a picture signal, which film is moved at a constant speed, an image position correction which is as motion-independent as possible, is ensured in that the film scanner at least doubly scans at least parts of each film image and determines image position errors by comparing the two scanning signals of the same nominal image content, and corrects the picture signal in dependence upon the determined image position error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.