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BSI BS ISO 10505:2009

Photography. Root mean square granularity of photographic films. Method of measurement
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BSI BS ISO 10505:2009

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

PUBLISH DATE 2009
PAGES 36
BSI BS ISO 10505:2009

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 5Ă— and 12Ă— (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).

SDO BSI: British Standards Institution
Document Number ISO 10505
Publication Date June 30, 2009
Language en - English
Page Count
Revision Level
Supercedes
Committee CPW/42
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