Photocopying – Projection printing and copying cameras – Methods
Patent
1989-05-18
1989-11-28
Hayes, Monroe H.
Photocopying
Projection printing and copying cameras
Methods
355 35, 355 38, G03B 2732, G03B 2780
Patent
active
048841021
ABSTRACT:
The factors necessary for controlling photographic systems involve the photographic characteristics such as developing process characteristics which are subject to complicated interaction among various factors. Since it is difficult to measure and control such variable factor independently, situations involving such variations are preferably grasped comprehensively by a small number of criteria or values and controlled with a small number of values having high correlation with the variations. When gray image of an original film is photometrically measured at printing in three primary colors, the image densities in the colors are not uniform even with the same exposure and image density ratio is not uniform, either. This invention method enables optimum control of the photographic system by estimating the current photographic characteristics with the data up until the current spot, and further enables normalization of measured data at a high precision.
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Fuji Photo Film Co. , Ltd.
Hayes Monroe H.
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