Apparatus and method for aligning a repositionable imaging sensor with a photographic image in a film video system
US4875103A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1988 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Aug 19, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0406
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a film video system, a repositionable imaging solid state sensor is used to generate electric signals in reponse to a photographic image for display on a video monitor. The repositionable sensor is aligned with the photographic image by locating a fixed mask between a source for illuminating the image and the sensor. Corner pixels of the sensor are identified, and the sensor is moved relative to the mask. When at least one of these corner pixels transition between a light and dark state during movement of the sensor, it is indicative of the presence of an edge of the mask. By moving the sensor and calculating the distance between edges of the mask, the sensor may be aligned with the mask. Since the mask is aligned with the photographic image, the sensor is aligned with the photographic image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.