ISO INTERNATIONAL STANDARD 19093 First edition 2018-09-05 Photography Digital cameras : Measuring low-light performance Photographie - Caméras numeriques - Mesurage des performances dans des conditions defaible luminosite Reference number IS0 19093:2018(E) ISO @IS02018 IS0 19093:2018(E) COPYRIGHT PROTECTED DOCUMENT @ IS0 2018, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form writtenpermission.Permission canberequestedfromeitherIsOattheaddressbelow orIso'smemberbodyinthecountryof the requester. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org ii @ IS0 2018 - All rights reserved IS0 19093:2018 Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions ..1 4 Test conditions and setup .2 4.1 Test chart .2 4.1.1 Test chart and illumination .2 4.2 Camera settings .3 4.2.1 General .3 4.2.2 Test lenses 4 4.2.3 Auto focus .4 4.2.4 Quality and file type. 4 4.2.5 Iso sensitivity setting 4 4.2.6 White balance 4 4.2.7 Flash.. 5 4.2.8 Noise reduction 5 4.2.9 Exposure mode 5 4.2.10 Scene and capture modes. .5 4.3 Capturing a reference image 5 4.4 Capture of the test images. 5 4.4.1 Illumination level 5 4.4.2 Best image selection 5 5 Camera performance aspects affected by low light .6 5.1 Exposure time .6 5.2 Exposure level ..6 5.3 Noise. .6 5.4 Texture (low-contrast fine detail) .6 5.5 Chroma decrease. .7 Presentation of the results .8 6 Annex A (informative) Example for generating a single performance value from measured results. ..10 Annex B (normative) Test chart. ..12 Bibliography ..19 @ IS0 2018 - All rights reserved ii