Scene illuminate effect on additive two-color reproduction

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Title: Scene illuminate effect on additive two-color reproduction
Author: Manfredo, John C.
Abstract: Whether a two-color reproduction from a red and green additive process is acceptable depends largely on the nature of the scene and its illumination. Additive two-color reproduction will be explored here using different scene illuminants and also different red and green filter combinations. Two projection methods are also examined. Red and green separations were produced by photographing a scene through 16 different filter combinations and 3 different scene illuminants. These separations are then projected two different ways. One method involves projecting the separations back through the red and green filters they were taken through, while in the other method the green filter is removed and replaced with a neutral density. It was found that tungsten was the best scene illuminant at reproducing the original scene colors, and that the best overall filter combination at doing this was a 26,61 Wratten filter combination.
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Date: 1981-05

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