ISO INTERNATIONAL STANDARD 17957 Firstedition 2015-04-01 Photography Digital cameras Shading measurements PhotographieCameras numeriques-Mesurages d'ombrage Reference number ISO17957:2015(E) ISO Intermational Organization for Standardization @IS02015 dardization5956617 No reproduction or itted without license from IHS IS0 17957:2015(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISOcopyrightoffice Case postale 56.CH-1211 Geneva 20 Tel. +4122 749 0111 Fax +41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland PrganizationforStandardization Uicense-zhejang lnst of Standardzaion SsJS9 2015 - All rights reserved networking permited without license from IHS NotforResale, 2015/6/2908:43:19 IS017957:2015(E) Contents Page Foreword ..iv Introduction. 1 Scope. 2 Normative references ..1 3 Terms and definitions .1 4 Testconditionsandmethods .1 4.1 General .1 4.2 Apparatus and hardware .2 4.3 Lighting.... .2 4.4 Testchart. .2 4.5 Image/camera settings 2 Analytical approach. .3 5.1 General .3 5.2 Lightness non-uniformity 4 5.3 Luminancenon-uniformity .4 5.4 Chrominancenon-uniformity 5 5.5 Total colournon-uniformity .5 6 Presentationsofresults ..5 AnnexA(normative)Recommendedmeasurementcondition ..7 Annex B (informative) Example of shading metric calculation .8 Bibliography .13 iii idardization5956617 thout license from IHS