1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS ISO 11928-2:2000 Incor
2、porating Corrigendum No. 1 ICS 35.220.30; 37.080 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Micrographics Quality control of graphic COM recorders Part 2: Quality criteria and controlThis British Standard, having been prepared under the direction of the DISC Board , was p
3、ublished under the authority of the Standards Committee and comes into effect on 15 May 2000 BSI 31 October-2001 ISBN 0 580 34732 X BS ISO 11928-2:2000 Amendments issued since publication Amd. No. Date Comments 13164 Corrigendum No.1 31 October 2001 Addition of supersession details in the National f
4、oreword National foreword This British Standard reproduces verbatim ISO 11928-2:2000 and implements it as the UK national standard. It supersedes BS 7353:1991 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee IDT/1, Document imaging applications, to Sub
5、committee IDT/1/1, Quality, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European
6、developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Standards Catalogue
7、 under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their corre
8、ct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 11 and a back cover. The BSI copyright notice displ
9、ayed in this document indicates when the document was last issued.Referencenumber ISO11928-2:2000(E) INTERNATIONAL STANDARD ISO 11928-2 Firstedition 2000-02-15 MicrographicsQualitycontrolofgraphic COMrecorders Part2: Qualitycriteriaandcontrol Micrographie Contrle de la qualit des imprimantes COM gra
10、phiques Partie 2: Critres et contrle qualitISO11928-2:2000(E) ii ISO11928-2:2000(E)iii Contents Page Foreword.iv Introduction.v 1 Scope1 2 Normativereferences1 3 Termsanddefinitions.2 4 Evaluation.2 4.1 General2 4.2 Testruns.2 4.3 Systemtolerances.2 5 Testframes:methodsofuse3 5.1 Testforframesize,li
11、nearityandpositioning.3 5.1.1 General3 5.1.2 Methods3 5.2 Testforresolution,legibilityanddensity.4 5.2.1 Resolution4 5.2.2 Legibility.4 5.2.3 Density4 5.3 Testforradialrecording.4 5.4 Testforcurvedlines5 5.4.1 Introduction5 5.4.2 Method5 5.5 Testframeformeasuringcharacterdisplayandrotation.5 AnnexA(
12、informative)Linedensity.11ISO11928-2:2000(E) iv Foreword ISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectf
13、orwhichatechnicalcommitteehasbeenestablishedhas therighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardiz
14、ation. InternationalStandardsaredraftedinaccordancewiththerulesgivenintheISO/IECDirectives,Part3. DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. Attentio
15、nisdrawntothepossibilitythatsomeoftheelementsofthispartofISO11928maybethesubjectof patentrights.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights. InternationalStandardISO11928-2waspreparedbyTechnicalCommitteeISO/TC171, Document imaging applications, Subcommittee SC 1, Quality. ISO1
16、1928consistsofthefollowingparts,underthegeneraltitle Micrographics Quality control of graphic COM recorders: Part 1: Characteristics of the test frames Part 2: Quality criteria and control AnnexAofthispartofISO11928isforinformationonly.ISO11928-2:2000(E)v Introduction ThispartofISO11928hasbeenprepar
17、edbecauseincreasingnumbersoftechnicaldrawingsarenowproduced onCOM,and,althoughtheirqualityisusuallyreasonable,theyarenotalwayscomparablewithmicrofilmcopiesof hardcopydrawings.Thiscancausedifficultywhenbothkindsofdrawingareputintoaperturecardsandusedin systemsdesignedtodealwithmicrofilmcopiesofhard-c
18、opy-drawings. ThispartofISO11928hasthereforebeenpreparedtohelpuserstoestablishproceduresthatshouldensurethat thequalityofCOM-generateddrawingsisbothacceptableinitselfandcomparableinqualitywithtechnical drawingsonconventionalmicrofilmthatcomplieswithISO3272-1,ISO3272-2andISO3272-3. Thetestframesspeci
19、fiedinISO11928-1maybeusedforsimplifiedroutinechecksifuserswishtomonitorthe qualityofCOM-generateddrawingswithoutgoingtotheexpenseofcarryingoutthespecifiedtests.INTERNATIONALSTANDARD ISO11928-2:2000(E)1 MicrographicsQualitycontrolofgraphicCOMrecorders Part2: Qualitycriteriaandcontrol 1 Scope Thispart
20、ofISO11928describesmethodsforusingtestframesspecifiedinISO11928-1tomonitortheimage qualityofmicroformsfromgraphicCOMrecorders. ItappliestographicCOMrecordersthatarecapableofproducingbothalphanumericandgraphicimagesoutputon toblack-and-whitefilms. 2 Normativereferences Thefollowingnormativedocumentsc
21、ontainprovisionswhich,throughreferenceinthistext,constituteprovisionsof thispartofISO11928.Fordatedreferences,subsequentamendmentsto,orrevisionsof,anyofthesepublications donotapply.However,partiestoagreementsbasedonthispartofISO11928areencouragedtoinvestigatethe possibilityofapplyingthemostrecentedi
22、tionsofthenormativedocumentsindicatedbelow.Forundated references,thelatesteditionofthenormativedocumentreferredtoapplies.MembersofISOandIECmaintain registersofcurrentlyvalidInternationalStandards. ISO5-2:1991, Photography Density measurements Part 2: Geometric conditions for transmission density. IS
23、O5-3:1995, Photography Density measurements Part 3: Spectral conditions. ISO3334:1989, Micrographics ISO resolution test chart No.2 Description and use. ISO5466:1996, Photography Processed safety photographic films Storage practices. ISO6196-1:1993, Micrographics Vocabulary Part 1: General terms. IS
24、O6196-4:1998, Micrographics Vocabulary Part 4: Materials and packaging. ISO6196-5:1987, Micrographics Vocabulary Part 5: Quality of images, legibility, inspection. ISO6196-6:1992, Micrographics Vocabulary Part 6: Equipment. ISO6196-7:1992, Micrographics Vocabulary Part 7: Computer micrographics. ISO
25、/DIS11928-1 1 , Micrographics Quality control of graphic COM recorders Part 1: Characteristics of the test frames. 1 Tobepublished.ISO11928-2:2000(E) 2 3 Termsanddefinitions ForthepurposesofthispartofISO11928,thedefinitionsgiveninISO6196andthefollowingapply. 3.1 testframe datafilewhichgeneratestesti
26、magesonaCOMrecorder 4 Evaluation 4.1 General TheevaluationofthequalityofagraphicCOMimageisacomplextask.Variousconditionscanoccurinagraphic COMrecorderthatarenotfoundinalphanumericCOMrecorders,whichcanbeevaluatedwiththeuseofaform slide.ManygraphicCOMrecordershavenoprovisionforaformslideandiftheyareto
27、beevaluatedall measurementswillhavetobetakenfromthemicroformimageproducedbytheimagegenerator. NOTE ItiscustomaryforgraphicCOMrecorderstoproducenegative-appearingfilmimages.Forclarityofpresentation,the examplesinfigures1-5havebeenreproducedaspositive-appearingimages. 4.2 Testruns Thetestsdescribedin5
28、shallbeusedinitiallytoevaluatethequalityofagraphicsCOMrecorder,andthen subsequentlytomonitoritsquality.Theymaybeusedasaroutineprocedure,orfordeterminingthereasonfor unsatisfactoryoutput. Theresultsoftheinitialtestrunsshallberetainedasareferencesampleforcomparisonwithsubsequentruns. Wherethistestrung
29、ivesresultsoutsidesystemtolerances(see4.3),thenthesystemshallbeadjustedandthe initialtestsrepeateduntilresultsarewithinsystemtolerances. Beforetestsarerun,theoperatorshallensurethatthefilmprocessorisinproperworkingorder. Thetestframesshallbeplottedusingtheminimumlinewidthrecommendedbythemanufacturer
30、forthetypeof testframebeingplotted. Theimagesgeneratedduringtestingshallbeexamined,andifanyshowssignificantsignsofdeteriorationin qualitycomparedwiththereferencesample,theentiresetofimagesshallbere-runandexamined. Resultsoftestrunsshallberetainedforauditpurposes. 4.3 Systemtolerances Systemtolerance
31、sfortestsspecifiedin5shallbeagreedwiththeequipmentsuppliersanddocumentedalongwith theresultsoftheinitialtestruns. Valuesobtainedfromtestsspecifiedin5.2.3shouldbeinaccordancewithTablel.ISO11928-2:2000(E)3 Table1Summaryofacceptabledensitylimits Filmtype Process Minimum D max Maximum D min Minimum dens
32、ity difference Silver-gelatin Conventional 1,00 0,15 plusbase 0,90 Silver-gelatin Fullreversalor directpositive 1,50 (1,80preferred) 0,20 plusbase 1,30 Thermally processedsilver Heat 1,00 0,40 plusbase 0,60 (0,80preferred) 5 Testframes:methodsofuse 5.1 Testforframesize,linearityandpositioning 5.1.1
33、General Amicroscopeequipedwithastagecapableofmeasurementalongxandyaxisshouldbeusedtotake measurementsoftheimageofthetestframe.Thetestframe(seefigure1)shallberecordedatthebeginningand endofeachtestsequence. 5.1.2 Methods 5.1.2.1 Framesize MeasurethelengthofthecentrelinesEGandHF,andcheckthattheyarewit
34、hinsystemtolerances(see4.3). 5.1.2.2 Linestraightness AlignthefilmsothattheendpointsofthecentrelineHFcoincidewiththeXaxisofthemicroscope.Traversethe lineandmeasurethemaximumdeviationofthecentreofthelinefromtheXaxisalongtheYaxis.Repeatthetest forlinesABandDC. Alignthefilmsothattheendpointsofthecentre
35、lineEGcoincidewiththeYaxisofthemicroscope.Traversethe lineandmeasurethemaximumdeviationofthecentreofthelinefromtheYaxisalongtheXaxis.Repeatthetest forlinesADandBC. Statewhetherthemaximumdeviationiswithinsystemtolerances(see4.3).Tofindthepercentageofdeviation, dividethemaximumdeviationbythelinelength
36、andmultiplythatnumberby100. 5.1.2.3 Orthogonality Firstcheckthatthestraightnessofthecentrelinesiswithinsystemtolerances(see4.3)andthenmeasurethe diagonallines,EF,EH,GF,GH,AO,BO,COandDO,tocheckthattheyareofequallengthtowithinsystem tolerances.ISO11928-2:2000(E) 4 5.1.2.4 Linearity Measurethehorizonta
37、landverticaldistancesofeachgridlineintersectionfromthelinesADandCDrespectively. Comparethesemeasurementswiththecomputedidealdistanceforeachandcheckthatanyerrorsarewithin systemtolerances(see4.3). 5.1.2.5 Linewidth Traversethelineandmeasureitsminimumandmaximumthickness.Checkthatthemeasurementsarewith
38、in systemtolerances(see4.3). 5.1.2.6 Alignmentofimagecentrelinetofilmedge AligntheXaxisofthemicroscopewiththereferenceedgeofthefilm.Measurethedistancefromthereference edgetothehorizontalcentrelineatthecentreofthelineandattheendpoints.Checkthatthemeasurementsare withinsystemtolerances(see4.3). 5.1.2.
39、7 Imagecentering Checkthatthemeasurementsin5.1.2.6correspondwiththecentrelineofthefilm,towithinsystemtolerances(see 4.3). Foraperturecards,similarmeasurementsshouldbemadealsofortheverticalcentrelinebothbeingreferredto thecardedges. 5.2 Testforresolution,legibilityanddensity 5.2.1 Resolution Usingami
40、croscopewithamagnificationof1to3timestheeffectivereductionratio,examinethetargetsatthe centreandineachcorneroftheframe(seefigure2).Notetheletterofthesmallestresolvablegroupoflinesin eachtarget,followingthemethoddescribedinISO3334. NOTE Groupsaredesignatedbyletterratherthannumericalvaluebecausetheres
41、olutionrecordedisafunctionofimage size.Theactualresolutioninlinepairspermillimetrecanbedeterminedbycomparingtheresultsobtainedwithatablesupplied bythemanufactureroftheCOMrecorder. 5.2.2 Legibility Examinethegroupsofletters“e“andnotethegroupnumberofthesmallestletterthatisfullylegible. 5.2.3 Density U
42、singadensitometer,measuretheminimumandmaximumdiffusedensityinaccordancewithISO5-2and ISO5-3. NOTE Forthermallyprocessedfilmmeasurevisualprojectiondensity. Table1givesacceptablevalues. 5.3 Testforradialrecording Takemeasurementstocheckthatalllinesareofequaldensityandarecontinuousandstraight,withoutsi
43、gnsof misalignedbutting,andwhetherthelinesmeetinthecentreandareparallelineachlinepair.ISO11928-2:2000(E)5 5.4 Testforcurvedlines 5.4.1 Introduction Thetestframe(seefigure4)isdesignedtocheckthesystemsaccuracyinproducingcurvedlines. 5.4.2 Method Measuretheeightradiallinesofeachcircletocheckthatthedist
44、ancefromcircumferenceofacircletothecentre isthesamealonganyradius. Takemeasurementstocheckwhetherinthecirclesdrawnwithdoublelinesthedistancebetweenthetwolinesis constant. 5.5 Testframeformeasuringcharacterdisplayandrotation Examinethelinesofcharacters.Checkfordistortionandpoorlyformedcharacters,inth
45、echaractersizegridandin thecornerpatterns.ISO11928-2:2000(E) 6 Figure1Samplelayoutoftestframeforcheckingframesize,linearityandpositioning NOTE Thelettersatthecorners,midpointsandcentreoftheframehavebeenaddedforeaseofreferenceinthetext.They neednotappearonthefilm.ISO11928-2:2000(E)7 Figure2Samplelayo
46、utoftestframesforcheckingresolution,legibilityanddensityISO11928-2:2000(E) 8 Figure3SamplelayoutoftestframeforcheckingradialrecordingISO11928-2:2000(E)9 Figure4SamplelayoutoftestframeforcheckingcurvedlinesISO11928-2:2000(E) 10 Figure5SamplelayoutoftestframeformeasuringcharacterdisplayandrotationISO1
47、1928-2:2000(E)11 AnnexA (informative) Linedensity ItisimportanttoensurethatrasterCOM-generatedimageswillduplicatesatisfactorilywhenexposedona duplicatingmachineatintensitysettingscompatiblewiththoseforsource-documentmicroforms. Therequirementsforthedensityofsource-documentmicroformsspecifiedinISO327
48、2-2arenotnecessarily applicabletoCOM-generatedimages.ThelinedensityofaCOM-generatedimagecannotbemeasuredwith instrumentsnormallyavailabletoCOMusers.Thecorrelationoflinecharacteristicsandduplicatingexposureis complex,andcanvarywiththetypeofequipmentanditsopticalcharacteristics. Thebestmethodforausera
49、ndsuppliertoadoptinagreeingdensityvaluesforCOM-generatedimagesisfirstto assessmasterandduplicateorprintsource-documentmicroformsthatcomplywithISO3272-2andthento comparethecharacteristicsoftheCOM-generatedimagesoproducedwiththesource-documentimage. ProductionoftheCOM-generatedmasterimagemaythenbeadjustedtoproduceimagesofagreedquality.BS ISO 11928-2:2000 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It prese
