Correlation between Random-Dot Samples and the Photographic Emulsion*
J. C. Marchant, P.L.P. Dillon · Journal of the Optical Society of America · 1961
A method is described for producing samples of an “ideal model” of the developed photographic image (opaque circular dots distributed randomly over a clear background). The dots originate as random scintillations on the face of a cathode-ray tube and are recorded photographically. Expressions for density, root-mean-square density deviation, and Selwyn granularity are derived on the basis of the model. Samples produced by this method are shown experimentally to conform to the expected properties.