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Roles of Sharpness and Graininess in Photographic Quality and Definition

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Abstract

Sensitometrically matched photographic prints were judged by a number of observers for sharpness, graininess, and two over-all attributes that were termed in the instructions “picture quality” and “definition.” The results indicate that the two latter terms had definite meanings for the observers, but the term “picture quality” led the observers to weight sharpness and graininess about equally while the term “definition” led to a high correlation with sharpness and a low correlation with graininess. Both the method of ranking and the method of paired comparisons were used, and they were found to be about equally capable of disclosing inconsistencies.

© 1962 Optical Society of America

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