ANSI Standards Connect ET ( INTERNATIONAL ISO STANDARD 12233 Fourth edition 2023-02 Techno -GuestUser01-07/19/2023 Photography Electronic still picture imaging Resolution and spatial frequency responses Photographie Imagerie des prises de vues électroniques - Résolution et reponses en fréquence spatiale Reference number ISO 12233:2023(E) osi IS02023 ANSI StandardsConnect ET IS0 12233:2023(E) -GuestUser01-07/19/2023 COPYRIGHTPROTECTEDDOCUMENT @IS02023 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may or ISo's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ Is0 2023 - All rights reserved ANSI IS0 12233:2023(E) Sta rds Co Contents Page ET Foreword. ..V po Introduction. ..vi 1 Scope. by Eda 2 Normative references 3 Terms and definitions 4 Test conditions. .5 4.1 Test chart illumination. .5 4.2 Camera framing and lens focal length setting .6 4.3 Camera focusing .6 4.4 Camera settings ..6 Gu 4.5 White balance 7 4.6 Luminance and colour measurements User 4.7 Gamma correction 7 01-07/19/2023 5 Visual resolution measurement .7 5.1 General. 7 5.2 Test chart. ..8 5.2.1 General .8 5.2.2 Material. .8 5.2.3 Size. .8 5.2.4 Test patterns. ..8 5.2.5 Test pattern modulation ..8 5.2.6 Positional tolerance 5.3 Rules of judgement for visual observation 9 5.3.1 Rulesofjudgement ..9 5.3.2 An example of a correct visual judgement ..9 6 Edge-based spatial frequency response (e-SFR) .10 6.1 General .10 6.2 Methodology .. 13 7 Sinewave-based spatial frequency response (s-SFR) measurement ..13 8 Presentation of results ..14 8.1 General. 14 8.2 Resolution .15 8.2.1 General .. 15 8.2.2 Basic presentation .15 8.2.3 Representative presentation .15 8.3 Spatial frequency response (SFR) .15 8.3.1 General .15 8.3.2 Spatial frequency response ..15 8.3.3 Report of resolution value derived from the s-SFR .16 Annex A (informative) CIPA resolution chart. .18 Annex B (informative) Visual resolution measurement software. ..24 Annex C (informative) Edge SFR test chart. .30 Annex D (informative) Edge spatial frequency response (e-SFR) algorithm ..32 Annex E (normative) Sine wave star test chart ..38 Annex F (normative) Sine wave spatial frequency response (s-SFR) analysis algorithm ..41 Annex G (informative) Colour-filtered resolution measurements ..46 Annex H (informative) Units and summary metrics ..48 IS0 2023 - All rights reserved iii ANSI IS0 12233:2023(E) Standards Con Annex I (informative) 0riginal test chart defined in IS0 12233:2000 .52 lect Annex J (informative) Non-uniform illumination compensation for some applications .56 ET Annex K (informative) Derivation of correction functions 62 pow Annex L (informative) Acutance calculation. .66 red Annex M (informative) Matlab function for computing e-SFR .69 by Eda Bibliography .75 -GuestUser01-07/19/2023 iv IS02023-Allrightsreserved ANSISta IS0 12233:2023(E) Foreword ET Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through IsO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are describedintheIsO/EcDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthe different types of Iso documents should be noted. This document was drafted in accordance with