The presence of graininess in a photographic emulsion provides a threshold below which a signal will not be detectable. Graininess thus acts as a limiting factor on dynamic range.
Granularity data of photographic emulsions are used to determine the minimum usable spot size when the dynamic range or the number of discernible grey steps of the recording is specified, or the resulting dynamic range, if the resolution element size is specified.
A brief analysis is made of the information content as affected by the element size, i.e., scanning spot size.
© 1958 Optical Society of AmericaFull Article | PDF Article
CorrectionsLeo Levi, "Errata," J. Opt. Soc. Am. 48, 276_3-276 (1958)
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