Photocopying – Projection printing and copying cameras – Methods
Patent
1980-06-19
1982-08-17
Hayes, Monroe H.
Photocopying
Projection printing and copying cameras
Methods
355 35, G03B 2732
Patent
active
043447040
ABSTRACT:
A method of determining correction parameters for adjusting the amounts of light to which originals are to be exposed in a color copying operation in dependence on the composition deviations of the respective original from a calibrating original involves establishing, for each of a multitude of regions of the respective original, two characteristic values respectively representative of a relationship between the blue and green color values, on the one hand, and the red and green color values, on the other hand, averaging those of the established characteristic values the relationships of which are within a distribution range normally encountered in an image of an object on the original, forming an average from the average values, and ascertaining the magnitude and direction of the correction parameters from the difference between the average obtained from the particular original and a like average obtained from the calibrating original. The regions into which the original is subdivided are successively scanned and the scanned area of each region is only a small fraction of the total area of the respective region. The method may be performed on a single original or on a series of originals.
REFERENCES:
patent: 3582325 (1971-06-01), Paulus
patent: 3724947 (1973-04-01), Paulus
patent: 4092067 (1978-05-01), Grossmann
patent: 4101216 (1978-07-01), Grossmann
patent: 4168120 (1979-09-01), Freier et al.
patent: 4192605 (1980-03-01), Fergg et al.
patent: 4203671 (1980-05-01), Takahashi et al.
patent: 4244654 (1981-01-01), Asai et al.
Bunge Konrad
Thurm Siegfried
Agfa-Gevaert Aktiengesellschaft
Hayes Monroe H.
LandOfFree
Method of determining correction parameters for use in light-amo 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 of determining correction parameters for use in light-amo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of determining correction parameters for use in light-amo will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-184942