Automatic exposure corrections for photographic printer
US4168120A · kind A · utility
38Cited by
33References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1978 |
| Grant date | Sep 18, 1979 |
| Priority date | — |
| Expiry date | Apr 17, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/80
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An automatic photographic printer includes a sensor system for providing density signals indicative of measured optical density of a photographic film at a plurality of defined areas of the film. Photographic films containing landscape type scenes, snow/beach type scenes, and other scenes which might be incorrectly identified as subject density failures, are identified. The identified films are excluded from receiving a subject density failure exposure correction, while the remaining films are subjected to an automatic subject density failure exposure correction which is derived from the density signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.