Optics: measuring and testing – By shade or color – Photography
Patent
1985-01-14
1987-05-19
Evans, F. L.
Optics: measuring and testing
By shade or color
Photography
356380, 356444, 355 38, G01J 340
Patent
active
046663061
ABSTRACT:
The density of an original picture film must be measured in order to determine exposure and correction amount for printing in a photographic printing system. A photosensor was heretofore arranged near an optical path of the photographic printing system and used to measure the average density of a negative film in LATD. When an original film is printed on a photographic paper, it is necessary to adjust the exposure or correction amount for various sizes of the film due to the difference in diffusion by film size. Conventionally those adjustments are performed by visually judging the size of a film and inputting the information manually via a keyboard or reading a negative size status signal of a negative carrier. According to this invention, the image information of an original film can be detected precisely in detail by a simple structure to automatically discriminate the size of the film as well as to automatically and effectively determine the exposure amount for each size based upon the result of the automatic discrimination or the size data which is inputted separately.
REFERENCES:
patent: 3515487 (1970-06-01), Hatcher, Jr. et al.
patent: 3709613 (1973-01-01), Zahn et al.
patent: 4101216 (1978-07-01), Grossmann
patent: 4105925 (1978-08-01), Rossol et al.
patent: 4217648 (1980-08-01), Thurm et al.
patent: 4286868 (1981-09-01), Laska
patent: 4551023 (1985-11-01), Nakauchi
Evans F. L.
Fuji Photo Film Co. , Ltd.
LandOfFree
Method and apparatus for detecting photographic image informatio does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for detecting photographic image informatio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting photographic image informatio will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1560988