AS ISO 15739:2024 identically adopts ISO 15739:2023, which specifies methods for measuring and reporting the noise versus signal level and dynamic range of digital still cameras
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test conditions
4.1 General
4.2 Illumination
4.2.1 Characteristics
4.2.2 Daylight illumination
4.2.3 Tungsten illumination
4.2.4 Uniformity of illumination and reflection test chart illumination geometry
4.2.5 Light source amplitude variations
4.3 Temperature and relative humidity
4.4 White balance
4.5 Infrared (IR) blocking filter
4.6 Photosite integration time
4.7 Compression
5 Noise measurement procedures
5.1 General
5.2 Measurement of a DSC using a test chart
5.2.1 General
5.2.2 OECF measurement
5.2.3 Adjustment of illumination
5.2.4 Test chart
5.2.5 Non-uniformity and image structure spatial components
5.2.6 Camera lens focus
5.3 Measurement of a DSC having manual exposure control
5.3.1 General
5.3.2 OECF measurement
5.3.3 Adjustment of illumination
5.3.4 Test densities
5.3.5 Diffuser setting
5.3.6 Camera lens focus
5.4 Measurement of a DSC having a removable lens
5.4.1 General
5.4.2 OECF measurement
5.4.3 Adjustment of illumination
5.4.4 Test densities
6 Calculation of metrics
6.1 General
6.2 Noise
6.2.1 General
6.2.2 Determining the noise for luminance measurements
6.2.3 Determining the noise for exposure measurements
6.3 Signal-to-noise ratios — large area
6.3.1 General
6.3.2 Determining the reference luminance and luminance value for calculating signal-to-noise ratio
6.3.3 Determining the signal-to-total noise ratio
6.3.4 Determining the temporal signal-to-noise ratio
6.3.5 Determining the fixed pattern signal-to-noise ratio
6.3.6 Determining the exposure values and the signal-to-noise ratios for exposure measurements
6.4 DSC dynamic range
6.4.1 General
6.4.2 Determining the DSC dynamic range for luminance measurements
6.4.3 Determining the DSC dynamic range for exposure measurements
7 Presentation of results
7.1 General
7.2 Signal-to-noise ratios
7.3 DSC dynamic range
Annex A
A.1 Object
A.1.1 General
A.1.2 Analysis
A.1.3 Average noise
A.1.4 Temporal noise
A.1.5 Fixed pattern noise
A.2 Method using eight images
A.2.1 Step-by-step description
A.2.2 Evaluation of the method using example data
A.2.2.1 Example data
A.2.2.2 Evaluation
Annex B
B.1 General
B.2 Algorithm used for the visual noise measurements
B.2.1 RGB to XYZ(E)
B.2.2 XYZ(E) into opponent space AC1C2
B.2.3 Discrete Fourier transform (DFT)
B.2.4 Applying the contrast sensitivity function
B.2.5 Inverse Fourier transform
B.2.6 Opponent space AC1C2 into XYZ(E)
B.2.7 XYZ(E) to XYZ(D65)
B.2.8 XYZ(D65) to L*a*b*
B.2.9 Determining the standard deviation for each grey patch
B.2.10 The weighted sum representing the visual noise
