Abstract

A simplified model of grain is presented. Using a black and white checkerboard pattern of varying macroscopic transmission, the entropy, as defined in information theory, is computed and plotted as a function of transmission and density. The similarity between the entropy versus density curve and empirically determined graininess versus density curves suggest the possibility that the subjective term “graininess” represents the observer’s description of the disorder of the granular sample.

© 1958 Optical Society of America

Some Theoretical Considerations on Photographic Graininess and Granularity*

J. H. Webb
J. Opt. Soc. Am. 45(5) 379-388 (1955)

An Instrument for the Measurement of the Graininess of Photographic Materials *†

E. M. Lowry
J. Opt. Soc. Am. 26(1) 65-72 (1936)

Photographic Granularity and Graininess*III. Some Characteristics of the Visual System of Importance in the Evaluation of Graininess and Granularity

Loyd A. Jones and George C. Higgins
J. Opt. Soc. Am. 37(4) 217-263 (1947)

Relation between Graininess and Granularity for Black-and-White Samples with Nonuniform Granularity Spectra*

Keith F. Stultz and Hans J. Zweig
J. Opt. Soc. Am. 49(7) 693-702 (1959)

Photographic Granularity and Graininess†,*II. The Effects of Variations in Instrumental and Analytical Techniques

Loyd A. Jones and George C. Higgins
J. Opt. Soc. Am. 36(4) 203-227 (1946)