SIST ISO 15739:2023

INTERNATIONAL ISO
STANDARD 15739
Fourth edition
2023-04
Photography — Electronic still-picture
imaging — Noise measurements
Photographie — Imagerie des prises de vue électroniques —
Mesurages du bruit
Reference number
© ISO 2023
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Published in Switzerland
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Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test conditions .3
4.1 General . 3
4.2 Illumination . 4
4.2.1 Characteristics . 4
4.2.2 Daylight illumination . 4
4.2.3 Tungsten illumination . 4
4.2.4 Uniformity of illumination and reflection test chart illumination geometry . 4
4.2.5 Light source amplitude variations . 4
4.3 Temperature and relative humidity . 4
4.4 White balance . 5
4.5 Infrared (IR) blocking filter . 5
4.6 Photosite integration time . 5
4.7 Compression . 5
5 Noise measurement procedures . 5
5.1 General . 5
5.2 Measurement of a DSC using a test chart . 5
5.2.1 General . 5
5.2.2 OECF measurement . 5
5.2.3 Adjustment of illumination . 6
5.2.4 Test chart. 6
5.2.5 Non-uniformity and image structure spatial components . 6
5.2.6 Camera lens focus . 6
5.3 Measurement of a DSC having manual exposure control . 7
5.3.1 General . 7
5.3.2 OECF measurement . 7
5.3.3 Adjustment of illumination . 8
5.3.4 Test densities . 8
5.3.5 Diffuser setting . 8
5.3.6 Camera lens focus . 8
5.4 Measurement of a DSC having a removable lens . 9
5.4.1 General . 9
5.4.2 OECF measurement . 9
5.4.3 Adjustment of illumination . 9
5.4.4 Test densities . 9
6 Calculation of metrics .10
6.1 General . 10
6.2 Noise . 10
6.2.1 General . 10
6.2.2 Determining the noise for luminance measurements . 11
6.2.3 Determining the noise for exposure measurements .12
6.3 Signal-to-noise ratios — large area .12
6.3.1 General .12
6.3.2 Determining the reference luminance and luminance value for calculating
signal-to-noise ratio .12
6.3.3 Determining the signal-to-total noise ratio .13
6.3.4 Determining the temporal signal-to-noise ratio . 14
6.3.5 Determining the fixed pattern signal-to-noise ratio . 14
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6.3.6 Determining the exposure values and the signal-to-noise ratios for
exposure measurements . 15
6.4 DSC dynamic range . 15
6.4.1 General .15
6.4.2 Determining the DSC dynamic range for luminance measurements .15
6.4.3 Determining the DSC dynamic range for exposure measurements . 17
7 Presentation of results .17
7.1 General . 17
7.2 Signal-to-noise ratios . 17
7.3 DSC dynamic range . 17
Annex A (normative) Noise component analysis .18
Annex B (normative) Visual noise measurements .24
Annex C (normative) Removing low frequency variations from the image signals .34
Annex D (informative) Procedure for determining signal-to-noise ratio .35
Annex E (informative) Practical viewing conditions for various output media .37
Annex F (informative) Introduction of perceptually uniform mapping of visual noise to
noisiness JND.38
Bibliography .41
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Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
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editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights
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