BS IS0 20677:2019 BSl Standards Publication Image technology colour management Extensions to architecture, profile format and data structure bsi. BS ISO 20677:2019 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS0 20677:2019 The UK participation in its preparation was entrusted to Technical Committee PAI/43, Graphic technology. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. @ The British Standards Institution 2019 Published by BSI Standards Limited 2019 ISBN 978 0 580 95905 9 ICS 37.100.99; 35.240.30 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2019. Amendments/corrigenda issued since publication Date Text affected BS IS0 20677:2019 INTERNATIONAL ISO STANDARD 20677 First edition 2019-02 Image technology colour management Extensions to architecture, profile format and data structure Gestion des couleurs dans les technologies de I'image-Extensions d'architecture, de format de profil et de structure de données Reference number IS0 20677:2019(E) tso @ IS0 2019 BS IS0 20677:2019 IS0 20677:2019(E) COPYRIGHTPROTECTEDDOCUMENT @IS02019 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. ISO copyright office CP 401·Ch.deBlandonnet8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved BS IS0 20677:2019 IS0 20677:2019(E) Contents Page Foreword .ix Introduction. x 1 Scope. 1 2 Normative references. .1 3 Terms, definitions and abbreviated terms 1 3.1 Terms and definitions. 3.2 Abbreviated terms... 2 4 Extended basic types .3 4.1 General 3 4.2 Extended basic type listing. 3 4.2.1 azimuthNumber 3 4.2.2 float16Number .3 4.2.3 float64Number 4 4.2.4 horizontalNumber 4 4.2.5 Sparse matrix encodings 4 4.2.6 sparseMatrixEncodingType 4.2.7 spectralRange. 7 4.2.8 tintArray 4.2.9 valueEncodingType .7 4.2.10 verticalNumber. 8 4.2.11 zenithNumber 8 5 Conformance. 9 6 Expanded PCSs, rendering intents and device encoding 9 6.1 General considerations. 6 6.2 Extensions to device colour encoding 9 6.3 Extensions to PCSs. .10 6.3.1 General. .10 6.3.2 Profile connection conditions .10 6.3.3 Spectral PCSs. .11 6.3.4 BRDF connection... .13 6.3.5 Directional viewing connection .13 6.4 Multiplex connection spaces. .13 6.4.1 General. .13 6.4.2 MCS signature encoding 6.5 Colour encoding space profiles. .14 7 Profile requirements. .15 7.1 General. 7.2 Profile header. .17 7.2.1 General. .17 7.2.2 Extended profile header field definitions .17 7.2.3 ColourEncodingSpace class profile header field definitions .18 7.2.4 Profile size field (bytes 0 to 3) .18 7.2.5 Preferred CMM type field (bytes 4 to 7) .18 7.2.6 Profile version and sub-version field (bytes 8 to 11) .18 7.2.7 Profile/device class field (bytes 12 to15) .19 7.2.8 Data colour space field (Bytes 16 to 20) .19 7.2.9 PCS field (Bytes 20 to 23). .20 7.2.10 Date and time field (bytes 24 to 35) .21 7.2.11 Profile file signature field (bytes 36 to 39) .21 7.2.12 Primary platform field (bytes 40 to 43). .21 7.2.13 Profile flags field (bytes 44 to 47) .21 7.2.14 Device manufacturer field (bytes 48 to 51) .22 @ IS0 2019 - All rights reserved iii BS IS0 20677:2019 IS0 20677:2019(E) Contents Page Foreword .ix Introduction. x 1 Scope. 1 2 Normative references. .1 3 Terms, definitions and abbreviated terms 1 3.1 Terms and definitions. 3.2 Abbreviated terms... 2 4 Extended basic types .3 4.1 General 3 4.2 Extended basic type listing. 3 4.2.1 azimuthNumber 3 4.2.2 float16Number .3 4.2.3 float6