ISO INTERNATIONAL STANDARD 16610-31 First edition 2016-11-15 Geometrical product specifications (GPS) 一 Filtration - Part 31: Robust profile filters: Gaussian regression filters Spécification géométrique des produits (GPS) - Filtrage - Partie 31:Filtres de profil robustes: Filtres de regression gaussiens Reference number ISO 16610-31:2016(E) (so @IS02016 IS0 16610-31:2016(E) COPYRIGHT PROTECTED DOCUMENT @ IS0 2016, Published in Switzerland 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. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214Vernier, Geneva,Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org ii @ IS0 2016 - All rights reserved IS0 16610-31:2016(E) Contents Page Foreword iv Introduction V 1 Scope. .1 2 Normative references 3 Terms and definitions 1 4 Robust Gaussian regression filter .2 4.1 Weighting function 2 4.2 Filter equation. 2 4.2.1 General. .2 4.2.2 Filter equation for the robust Gaussian regression filter for open profiles 2 4.2.3 Filter equation for robust Gaussian regression filter for closed profiles 5 4.2.4 Transmissioncharacteristics 6. 5 Recommendations for nesting index (cutoff values Ac) 6 Filter designation .6 Annex A (informative) Examples .7 Annex B (informative) Relationship to the filtration matrix mode) .10 Annex C (informative) Relationship to the GPS matrix model ..11 Bibliography .12 @IS0 2016 - All rights reserved iii