ISO 12233:2023
Photography — Electronic still picture imaging — Resolution and spatial frequency responses
This document specifies methods for measuring the resolution and the spatial frequency response (SFR) of electronic still-picture cameras. It is applicable to the measurement of both monochrome and colour cameras which output digital data or analogue video signals.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test conditions
4.1 Test chart illumination
4.2 Camera framing and lens focal length setting
4.3 Camera focusing
4.4 Camera settings
4.5 White balance
4.6 Luminance and colour measurements
4.7 Gamma correction
5 Visual resolution measurement
5.1 General
5.2 Test chart
5.2.1 General
5.2.2 Material
5.2.3 Size
5.2.4 Test patterns
5.2.5 Test pattern modulation
5.2.6 Positional tolerance
5.3 Rules of judgement for visual observation
5.3.1 Rules of judgement
5.3.2 An example of a correct visual judgement
6 Edge-based spatial frequency response (e-SFR)
6.1 General
6.2 Methodology
7 Sinewave-based spatial frequency response (s-SFR) measurement
8 Presentation of results
8.1 General
8.2 Resolution
8.2.1 General
8.2.2 Basic presentation
8.2.3 Representative presentation
8.3 Spatial frequency response (SFR)
8.3.1 General
8.3.2 Spatial frequency response
8.3.3 Report of resolution value derived from the s-SFR
Annex A (informative) CIPA resolution chart
Annex B (informative) Visual resolution measurement software
Annex C (informative) Edge SFR test chart
Annex D (informative) Edge spatial frequency response (e-SFR) algorithm
Annex E (normative) Sine wave star test chart
Annex F (normative) Sine wave spatial frequency response (s-SFR) analysis algorithm
Annex G (informative) Colour-filtered resolution measurements
Annex H (informative) Units and summary metrics
Annex I (informative) Original test chart defined in ISO 12233:2000
Annex J (informative) Non-uniform illumination compensation for some applications
Annex K (informative) Derivation of correction functions
Annex L (informative) Acutance calculation
Annex M (informative) Matlab function for computing e-SFR
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test conditions
4.1 Test chart illumination
4.2 Camera framing and lens focal length setting
4.3 Camera focusing
4.4 Camera settings
4.5 White balance
4.6 Luminance and colour measurements
4.7 Gamma correction
5 Visual resolution measurement
5.1 General
5.2 Test chart
5.2.1 General
5.2.2 Material
5.2.3 Size
5.2.4 Test patterns
5.2.5 Test pattern modulation
5.2.6 Positional tolerance
5.3 Rules of judgement for visual observation
5.3.1 Rules of judgement
5.3.2 An example of a correct visual judgement
6 Edge-based spatial frequency response (e-SFR)
6.1 General
6.2 Methodology
7 Sinewave-based spatial frequency response (s-SFR) measurement
8 Presentation of results
8.1 General
8.2 Resolution
8.2.1 General
8.2.2 Basic presentation
8.2.3 Representative presentation
8.3 Spatial frequency response (SFR)
8.3.1 General
8.3.2 Spatial frequency response
8.3.3 Report of resolution value derived from the s-SFR
Annex A (informative) CIPA resolution chart
Annex B (informative) Visual resolution measurement software
Annex C (informative) Edge SFR test chart
Annex D (informative) Edge spatial frequency response (e-SFR) algorithm
Annex E (normative) Sine wave star test chart
Annex F (normative) Sine wave spatial frequency response (s-SFR) analysis algorithm
Annex G (informative) Colour-filtered resolution measurements
Annex H (informative) Units and summary metrics
Annex I (informative) Original test chart defined in ISO 12233:2000
Annex J (informative) Non-uniform illumination compensation for some applications
Annex K (informative) Derivation of correction functions
Annex L (informative) Acutance calculation
Annex M (informative) Matlab function for computing e-SFR
Bibliography