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

BS ISO 10505:2009

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

Status : Current, Under review   Published : June 2009

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

BS ISO 10505 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 BS ISO 10505.

BS ISO 10505 is intended for imaging systems with viewing magnifications between 5× and 12×.

The following kinds of granularity measurements are not covered by BS ISO 10505, 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).

Contents of BS ISO 10505:

  • Foreword
  • Introduction
  • Scope
  • Normative references
  • Terms and definitions
  • Measurement instrument
  • General
  • Microdensitometer
  • Spectral products
  • Spatial frequency response
  • Scanning motion
  • Instrument electronics
  • Conversion to density
  • Temporal frequency response of the instrument
  • Instrument noise
  • Diffuse rms-granularity
  • Optical geometry
  • Diffuse conversion factor g
  • Preparation of specimens
  • Sampling and storage
  • Exposure
  • Processing
  • Specimen uniformity
  • Sampled area
  • Operation of the measurement instrument
  • Positioning the specimen
  • Specimen scanning
  • Control of focus
  • Rate of scan
  • Density mode
  • Method of test
  • Principle
  • Statistical background
  • Construction of the median estimator and the 95 % confidence intervals
  • Instrument noise
  • Diffuse rms-granularity
  • Uncertainty of the rms-granularity result
  • Reporting results
  • Summary of rms-granularity characterization parameters
  • Typical viewing magnifications for critical naked-eye viewing
  • Limiting the temporal frequency response of the measuring instrument
  • The effects of specimen non-uniformity
  • Derived constants c for subgroup sizes 10, 20, …, 200
  • Determination of sample size for specified precision and subgroup size
  • Bibliography



Standard NumberBS ISO 10505:2009
TitlePhotography. Root mean square granularity of photographic films. Method of measurement
StatusCurrent, Under review
Publication Date30 June 2009
Confirm Date13 January 2015
Normative References(Required to achieve compliance to this standard)ISO 5-2, ISO 5-3
Informative References(Provided for Information)ANSI/I3A IT2.37-2001, ISO/IEC Guide 98-3:2008, ISO 2907, GUM:1995, ISO 359
International RelationshipsISO 10505:2009
Draft Superseded By03/312222 DC07/30175287 DC
DescriptorsPhotographic materials, Photography, Measurement characteristics, Test equipment, Mathematical calculations, Optical properties of materials, Photographic film, Optical density, Densitometric analysis, Optical measurement
ICS37.040.20
Title in FrenchPhotographie. Moyenne quadratique granulaire de films photographiques. Méthode de mesure
Title in GermanFotografie. RMS-Körnigkeit von fotografischem Film. Messverfahren
CommitteeCPW/42
ISBN978 0 580 62022 5
PublisherBSI
FormatA4
DeliveryYes
Pages36
File Size406 KB
Price£214.00


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