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BS ISO 10505:2009

$167.15

Photography. Root mean square granularity of photographic films. Method of measurement

Published By Publication Date Number of Pages
BSI 2009 36
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This International Standard describes a method for determining the intrinsic root mean square granularity (rms-granularity) of photographic films. Intrinsic rms-granularity refers to those density fluctuations produced solely by the distribution of developed image forming centres in the photographic emulsion.

Continuous-tone monochrome (silver absorbing species) and colour (dye absorbing species) materials coated on a transmitting support can be measured by the procedures described in this International Standard. This International Standard is intended for imaging systems with viewing magnifications between 5× and 12× (see Annex A).

The following kinds of granularity measurements are not covered by this International Standard, even though they are photographically important:

  • reflecting materials (photographic papers);

  • materials having emulsion coated on both sides of the support (e.g. some X-ray films);

  • the estimation of the noise power spectrum (Wiener spectrum).

BS ISO 10505:2009
$167.15