A method is described for measuring the RMS granularity of black and white photographic materials at a diffuse density of 1.0 using a visual comparison technique. A set of standard granularity patches was prepared for use with a comparison microscope. Samples with known values of RMS granularity were evaluated by observers and it was found that the observer -measured values of granularity correlated well with the actual values of granularity. Some discrepancies from the expected relationship between observer-measured values and actual values are discussed.
Library of Congress Subject Headings
Photography--Films; Photographic sensitometry
Department, Program, or Center
School of Photographic Arts and Sciences (CIAS)
Smith, Jack C., "The measurement of RMS granularity of black and white photographic materials using a visual comparison technique" (1980). Thesis. Rochester Institute of Technology. Accessed from
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