Method for calibrating photographic image information
US4666307A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1985 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Jan 14, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/80
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a photographic image information detecting method of the type in which light transmitted from an original film is received by a two-dimensional image sensor and image information is detected with respect to the divided a plurality of picture elements of the original film, a photographic image information is calibrated by the steps of detecting information of the photographic image of a reference film with respect to the original film in use of the two-dimensional image sensor, storing the thus detected information as data for calibration, and subtracting the data for calibration from the detected data regarding the image information of the original film so as to thereby obtain accurately calibrated information regarding the photographic image of the original film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.