INTERNATIONAL ISO/IEC STANDARD 24790 First edition 2017-02 Information technology Office equipment - Measurement of image quality attributes for hardcopy output Monochrome text and graphic images Technologies de I'information - Equipement de bureau - Mesurage des attributs de qualité d'image - Texte monochrome et images graphiques Reference number IEC ISO/IEC 24790:2017(E) tso International Organization for Standardization STANDARDIZATION C15956617 @IS0/IEC2017 IS0/IEC 24790:2017(E) COPYRIGHT PROTECTED DOCUMENT IS0/IEC 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Internationai ibrg DrganizationforStandardization Licensee-ZHEJIANG INST OF STANDRJSQ/6NEC7 - All rights reserved networking permited without license from IHS IS0/IEC 24790:2017(E) Contents Page Foreword ..V Introduction. ..vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Report of results and sampling scheme .5 4.1 Report of results .5 Test identification information. .5 4.1.1 4.1.2 Instrument system. .5 4.1.3 Conformance .5 4.1.4 Sampling scheme 5 4.1.5 Results. .5 4.2 Sampling of pages. .6 4.3 Sampling of images .6 4.3.1 General. .6 4.3.2 Discretionary sampling ..6 4.3.3 Random sampling ..7 4.3.4 Whole page sampling .8 5 Attributes and their measures .8 5.1 Schema of attributes 5.2 Large area graphic image quality attributes .9 5.2.1 General. .9 5.2.2 Large area Rmax and Rmin .9 5.2.3 Large area darkness. ..9 5.2.4 Background darkness. ..10 5.2.5 Graininess. .11 5.2.6 Mottle. ..13 5.2.7 Background extraneous mark .14 5.2.8 Large area void. .15 5.2.9 Banding .16 5.3 Character and line image quality attributes 5.3.1 General. .17 5.3.2 Character and line image Rmax and Rmin .17 5.3.3 Line width .18 5.3.4 Character darkness. .18 5.3.5 Blurriness. .19 5.3.6 Raggedness. 20 5.3.7 Character void. 21 5.3.8 Character surround area extraneous mark 22 5.3.9 Character surround area haze. 23 6 System conformance. .23 6.1 Conformance standard 23 6.2 Instrument 24 6.2.1 OECF conversion. 24 6.2.2 MTF compensation 25 6.3 Test objects. .26 6.3.1 Specification for production of lines .26 6.3.2 Specification for production of large images .31 6.3.3 Sianted edge pattern.. ..34 6.4 Goal values .34 Annex A (normative) Bitmaps for conformance test lines .37 iii icensee=ZHEJIANG INST OF STANDARDIZATION C1 5956617 ed without license from IHS Not for Resale, 2017/5/11 02:42:43