ISO INTERNATIONAL STANDARD 20462-1 First edition 2005-11-01 Photography Psychophysical experimental methods for estimating image quality - Part 1: Overview of psychophysical elements Photographie Methodes psychophysiques expérimentales pour estimer la qualité d'image - Partie 1: Apercu général des éléments psychophysiques Reference number ISO 20462-1:2005(E) @ ISO 2005 ISO 20462-1:2005(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The Iso Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation ? ISO2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either isO at the address below or IsO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @IsO2005-All rights reserved ISO 20462-1:2005(E) Contents Page Foreword. Introductiol 1 Scope 2 Normative references 3 Terms anddefinitions 4 Specification of the experimental conditions and results. 4.1 Observer characteristics... 4.2 Stimulus properties . 4.3 Instructions to the observer 4.4 Viewing conditions 4.5 Experimentalduration 4.6 Results... 4.7 Summary of reported quantities 8 Annex A (informative) Selection of an appropriate psychophysical method .. 9 Annex B (informative) Stimulus differences, paired comparison proportions, and JNDs .. 11 Annex C (informative) Example of a report of a psychophysical experiment. 13 Annex D (informative) Comparison of selected psychometric methods.. 15 Bibliography ... ion'ghts reserved ISO 20462-1:2005(E) Foreword 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 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. International Standards are drafted in accordance with the rules given in the ISO/lE Directives, Part 2 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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. ISO 20462-1 was prepared by Technical Committee ISO/TC 42, Photography. Iso 20462 consists of the following parts, under the general title Photography - Psychophysical experimental methods for estimating image quality: Part 1:Overviewofpsychophysical elements Part 2: Triplet comparison method Part 3: Quality ruler method @ ISO 2005 - All rights reserved ISO 20462-1:2005(E) Introduction There are many circumstances under which it is desirable to quantify image quality in a standardized fashion differentexperiments.Suchinformation canbeof value inassessingtheperformance ofdifferent captureor display devices, image processing algorithms, etc. under various conditions. Ther