Color film writing system with closed loop control for electronic images
US4766503A · kind A · utility
14Cited by
4References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1986 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Jul 21, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/82
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging system for generating a color image on film from electronic video image data incorporates feedback control techniques to provide control of film density. The system includes variable gain amplifiers responsive to light intensity output of a film writing device for maintaining the output at a desired set level. In addition, the system includes apparatus and a method for monitoring the density of film images produced by the system and for utilizing the monitored values to modify the system transfer function in a direction to effect a change in the film density towards a desired value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.