Sughrue, Rothwell, Mion, Zinn and Macpeak
Method for controlling a photographic printing exposure
 A method is disclosed for controlling the exposure during photographic printing. The transmission density of a negative or original is measured to provide an exposure control signal. In an illustrative embodiment of this invention, the original is divided into a central portion, a peripheral portion, an upper portion, a lower portion, a right-hand portion and a left-hand portion. Means are provided for quantizing a difference in average density between the portions in the negative, which is classified into a plurality of categories in accordance with a logic of combining characteristic values of the negative. The method affords an enhancement of accuracy in exposure control and an enhancement of probability of obtaining prints of good quality. 
Fuji Photo Film Co., Ltd.
G
G03B
inventional
Shigeru Koji Taizo Takaaki Eiichi
Watanabe Takahashi Akimoto Terashita Asai