BS ISO 10505:2009
Current
The latest, up-to-date edition.
Photography. Root mean square granularity of photographic films. Method of measurement
Hardcopy , PDF
English
30-06-2009
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement instrument
4.1 General
4.2 Microdensitometer
4.3 Spectral products
4.4 Spatial frequency response
4.5 Scanning motion
5 Instrument electronics
5.1 Conversion to density
5.2 Temporal frequency response of the instrument
5.3 Instrument noise
6 Diffuse rms-granularity
6.1 Optical geometry
6.2 Diffuse conversion factor g
7 Preparation of specimens
7.1 Sampling and storage
7.2 Exposure
7.3 Processing
7.4 Specimen uniformity
7.5 Sampled area
8 Operation of the measurement instrument
8.1 Positioning the specimen
8.2 Specimen scanning
8.3 Control of focus
8.4 Rate of scan
8.5 Density mode
9 Method of test
9.1 Principle
9.2 Statistical background
9.3 Construction of the median estimator and the
95% confidence intervals
9.4 Instrument noise
9.5 Diffuse rms-granularity
9.6 Uncertainty of the rms-granularity result
9.7 Reporting results
9.8 Summary of rms-granularity characterization
parameters
Annex A (informative) - Typical viewing magnifications
for critical naked-eye viewing
Annex B (informative) - Limiting the temporal frequency
response of the measuring instrument
Annex C (informative) - The effects of specimen
non-uniformity
Annex D (informative) - Derived constants c for subgroup
sizes 10, 20, ..., 200
Annex E (informative) - Determination of sample size for
specified precision and subgroup size
Bibliography
Defines a method for determining the intrinsic root mean square granularity (rms-granularity) of photographic films.
| Committee |
CPW/42
|
| DevelopmentNote |
Supersedes 07/30175287 DC. (06/2009) Reviewed and confirmed by BSI, August 2014. (07/2014)
|
| DocumentType |
Standard
|
| Pages |
36
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
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).
| Standards | Relationship |
| ISO 10505:2009 | Identical |
| ISO 359:1983 | Cinematography — Projectable image area on 16 mm motion-picture prints — Dimensions and location |
| ISO 2907:2002 | Cinematography — Maximum projectable image area on 35 mm motion-picture film — Position and dimensions |
| ISO 5-3:2009 | Photography and graphic technology — Density measurements — Part 3: Spectral conditions |
| ISO 5-2:2009 | Photography and graphic technology — Density measurements — Part 2: Geometric conditions for transmittance density |
| ISO/IEC Guide 98-3:2008 | Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) |
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