INTERNATIONAL ISO/CIE STANDARD 11664-4 First edition 2019-06 Colorimetry - Part 4: CIE 1976 L*a*b* colour space Colorimétrie - Partie 4: Espace chromatique L*a*b* CIE 1976 Reference number IS0/CIE 11664-4:2019(E) cie @ IS0/CIE 2019 IS0/CIE 11664-4:2019(E) COPYRIGHTPROTECTEDDOCUMENT IS0/CIE2019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 orIso's memberbody inthe country oftherequester ISO copyrightoffice CIECentralBureau CP 401 · Ch. de Blandonnet 8 BabenbergerstraBe 9/9A CH-1214 Vernier, Geneva A-1010 Vienna, Austria Phone: +41 22 749 01 11 Phone: +43 1 714 3187 Fax: +41 22 749 09 47 Fax: +41 22 749 09 47 Email: [email protected] Email: [email protected] Website: www.iso.org Website: www.cie.co.at Published in Switzerland i @ IS0/CIE 2019 -All rights reserved