EN ISO 25178-2:2012

Geometrical product specifications (GPS) - Surface texture: Areal - Part 2: Terms, definitions and surface texture parameters (ISO 25178-2:2012)

ISO 25178-2:2012 specifies terms, definitions and parameters for the determination of surface texture by areal methods.

Geometrische Produktspezifikation (GPS) - Oberflächenbeschaffenheit: Flächenhaft - Teil 2: Begriffe und Oberflächen-Kenngrößen (ISO 25178-2:2012)

Dieser Teil von ISO 25178 legt die Benennungen, Definitionen und Parameter für die Ermittlung der Oberflächenbeschaffenheit durch flächenhafte Verfahren fest.

Spécification géométrique des produits (GPS) - Etat de surface: Surfacique - Partie 2: Termes, définitions et paramètres d'états de surface (ISO 25178-2:2012)

L'ISO 25178:2012 spécifie les termes, définitions et paramètres applicables à la détermination de l'état de surface au moyen de méthodes surfaciques.

Specifikacija geometrijskih veličin izdelka - Tekstura površine: ploskovna - 2. del: Poimenovanja, definicije in parametri teksture površine (ISO 25178-2:2012)

Ta mednarodni standard določa minimalne zahteve za instrumente in sisteme iz razreda topografov roženice (CT). Določa tudi preskuse in postopke za preverjanje, ali je sistem ali instrument v skladu s tem mednarodnim standardom, pri čemer se zato lahko opredeli kot topograf roženice v skladu s tem mednarodnim standardom. Določa tudi preskuse in postopke, ki omogočajo preverjanje zmogljivosti sistemov, ki presegajo minimalne zahteve za topografe roženice. Ta mednarodni standard opredeljuje izraze, ki so specifični za ugotavljanje oblike roženice, da bodo standardizirani na celotnem področju očesne optike. Ta mednarodni standard se uporablja za instrumente, sisteme in metode za merjenje površinske oblike roženice človeškega očesa.

General Information

• Status: Withdrawn
• Publication Date: 31-Mar-2012
• Withdrawal Date: 18-Jan-2022
• ICS: 17.040.20 - Properties of surfaces
• ICS: 17.040.30 - Measuring instruments
• Technical Committee: CEN/TC 290 - Dimensional and geometrical product specification and verification
• Drafting Committee: CEN/TC 290 - Dimensional and geometrical product specification and verification
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 19-Jan-2022
• Ref Project: SIST EN ISO 25178-2:2012 - Geometrical product specifications (GPS) - Surface texture: Areal - Part 2: Terms, definitions and surface texture parameters (ISO 25178-2:2012)

Relations

• Replaced By: EN ISO 25178-2:2022 - Geometrical product specifications (GPS) - Surface texture: Areal - Part 2: Terms, definitions and surface texture parameters (ISO 25178-2:2021, Corrected version 2023-11)
• Effective Date: 26-Jan-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2012
6SHFLILNDFLMDJHRPHWULMVNLKYHOLþLQL]GHOND7HNVWXUDSRYUãLQHSORVNRYQDGHO
3RLPHQRYDQMDGHILQLFLMHLQSDUDPHWULWHNVWXUHSRYUãLQH,62
Geometrical product specifications (GPS) - Surface texture: Areal - Part 2: Terms,
definitions and surface texture parameters (ISO 25178-2:2012)
Geometrische Produktspezifikation (GPS) - Oberflächenbeschaffenheit: Flächenhaft -
Teil 2: Begriffe und Oberflächen-Kenngrößen (ISO 25178-2:2012)
Spécification géométrique des produits (GPS) - État de surface: surfacique - Partie 2:
Termes, définitions et paramètres d'états de surface (ISO 25178-2:2012)
Ta slovenski standard je istoveten z: EN ISO 25178-2:2012
ICS:
17.040.20 Lastnosti površin Properties of surfaces
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 25178-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2012
ICS 17.040.20
English Version
Geometrical product specifications (GPS) - Surface texture:
Areal - Part 2: Terms, definitions and surface texture parameters
(ISO 25178-2:2012)
Spécification géométrique des produits (GPS) - Etat de Geometrische Produktspezifikation (GPS) -
surface: Surfacique - Partie 2: Termes, définitions et Oberflächenbeschaffenheit: Flächenhaft - Teil 2: Begriffe
paramètres d'états de surface (ISO 25178-2:2012) und Oberflächen-Kenngrößen (ISO 25178-2:2012)
This European Standard was approved by CEN on 17 September 2011.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 25178-2:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 25178-2:2012) has been prepared by Technical Committee ISO/TC 213 "Dimensional
and geometrical product specifications and verification" in collaboration with Technical Committee
CEN/TC 290 “Dimensional and geometrical product specification and verification” the secretariat of which is
held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by October 2012, and conflicting national standards shall be withdrawn at
the latest by October 2012.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 25178-2:2012 has been approved by CEN as a EN ISO 25178-2:2012 without any
modification.
INTERNATIONAL ISO
STANDARD 25178-2
First edition
2012-04-01
Geometrical product specifications
(GPS) — Surface texture: Areal —
Part 2:
Terms, definitions and surface texture
parameters
Spécification géométrique des produits (GPS) — État de surface:
Surfacique —
Partie 2: Termes, définitions et paramètres d'états de surface

Reference number
ISO 25178-2:2012(E)
©
ISO 2012
ISO 25178-2:2012(E)
©  ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
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E-mail [e-mail]
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Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 25178-2:2012(E)
Contents Page
Foreword . iv
Introduction . v
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
3.1  General terms . 1
3.2  Geometrical parameter terms . 4
3.3  Geometrical feature terms . 5
4  Field parameter definitions . 8
4.1  Height parameters . 8
4.2  Spatial parameters . 9
4.3  Hybrid parameters . 11
4.4  Functions and related parameters . 11
4.5  Miscellaneous parameters . 21
5  Determination of areal parameters for stratified functional surfaces of scale-limited
surfaces . 22
5.1  Calculating the parameters Sk, Smr1 and Smr2 . 22
5.2  Calculating the equivalent straight line . 22
5.3  Calculating the parameters Spk and Svk . 22
5.4  Calculating the parameters Spq, Svq and Smq . 22
6  Feature characterization . 24
6.1  General . 24
6.2  Type of texture feature . 25
6.3  Segmentation . 25
6.4  Determining significant features . 25
6.5  Section of feature attributes . 27
6.6  Attribute statistics . 28
6.7  Feature characterization convention . 28
6.8  Named feature parameters . 28
Annex A (informative) Segmentation . 31
Annex B (informative) Fractal methods . 36
Annex C (informative) Basis for areal surface texture standards . 41
Annex D (informative) Concept diagrams . 42
Annex E (informative) Relation to the GPS matrix model . 45
Bibliography . 46

ISO 25178-2:2012(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 25178-2 was prepared by Technical Committee ISO/TC 213, Dimensional and geometrical product
specifications and verification.
ISO 25178 consists of the following parts, under the general title Geometrical product specifications (GPS) —
Surface texture: Areal:
 Part 2: Terms, definitions and surface texture parameters
 Part 3: Specification operators
 Part 6: Classification of methods for measuring surface texture
 Part 70: Physical measurement standards
 Part 71: Software measurement standards
 Part 601: Nominal characteristics of contact (stylus) instruments
 Part 602: Nominal characteristics of non-contact (confocal chromatic probe) instruments
 Part 604: Nominal characteristics of non-contact (coherence scanning interferometry) instruments
 Part 605: Nominal characteristics of non-contact (point autofocus probe) instruments
 Part 701: Calibration and measurement standards for contact (stylus) instruments
The following parts are under preparation:
 Part 1: Indication of surface texture
 Part 603: Nominal characteristics of non-contact (phase-shifting interferometric microscopy) instruments

iv © ISO 2012 – All rights reserved

ISO 25178-2:2012(E)
Introduction
This part of ISO 25178 is a geometrical product specification (GPS) standard and is to be regarded as a
general GPS standard (see ISO/TR 14638). It influences chain link 2 of the chains of standards on areal
surface texture.
The ISO/GPS Masterplan given in ISO/TR 14638 gives an overview of the ISO/GPS system of which this
document is a part. The fundamental rules of ISO/GPS given in ISO 8015 apply to this document and the
default decision rules given in ISO 14253-1 apply to specifications made in accordance with this document,
unless otherwise indicated.
For more detailed information of the relation of this standard to the GPS matrix model, see Annex E.
This part of ISO 25178 develops the terminology, concepts and parameters fo
...