Eighteen photographs of two subjects, printed on contrast grades numbers 1, 2, and 4, of Kodak Polycontrast paper and mounted on gray, white, and black mount boards were subjectively evaluated to determine the number of noticeable density differences the average observer can see. Objective measurements were made of the noticeable density differences. The noticeable density differences for a continuous tone print were in nine major groupings and four minor groupings. No significant difference was found between the number of densities found on prints of different contrast and different mounts. No significant difference was found between photo graphic orientated and non-photographic orientated observers. No significant difference was found between male and female observers in the number of densities they were able to see.
Library of Congress Subject Headings
Department, Program, or Center
School of Photographic Arts and Sciences (CIAS)
Buckser, Barry, "Subjective Evaluation of the Noticeable Density Differences in a Continuous Tone Photograph" (1967). Thesis. Rochester Institute of Technology. Accessed from
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