ASTM_F_1294_-_97a_2009.pdf

Designation:F129497a(Reapproved 2009)Standard Terminology Relating toAutomatic Identification Hard Copy Printing Systems1This standard is issued under the fixed designation F1294;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 The definitions in this terminology are those that relatedirectly or indirectly to business imaging hard copy printingused in automatic data-capture systems and the measurementof the quality thereof.2.Referenced Documents2.1 ANSI Standard:ANSI X3.182 Guideline for Bar Code Print Quality3.Terminology3.1 Definitions:2D matrix symbolssee matrix symbols.2D stacked symbolssee multi-row symbols.2D(two-dimensional)symbol,na machine-readable sym-bol that must be examined both vertically and horizontally toread the entire message.Two-dimensional symbols may beof two types:matrix symbols and multi-row symbols.achieved width,nthe calculated bar or other element widthbased on measurements.AIAG,nan abbreviation for the Automotive Industry ActionGroup;a standards body composed of representatives fromthe U.S.automobile industry responsible for the develop-ment of a common automotive industry standard relating tosymbol technologies and Electronic Data Interchange(EDI).AIM,nan acronym for the Automatic Identification Manu-facturers;a trade association of automatic identificationsuppliers.angle of incidence,nthe angle between an incident ray andthe normal to a surface at the point of contact.Whenreferring to a scanner reading a printed symbol,the anglebetween the light source scanner beam and the symbolposition.aspect ratio,nin a bar code symbol,the ratio of bar heightto symbol length.autodiscrimination,nthe ability of a symbol reader toautomatically recognize and decode multiple symbologies.bar,none of two types of elements comprising a bar codesymbol.An element of a bar code symbol whose reflectanceis less than the Global Threshold.bar code,nan array of parallel rectangular marks and spacesin a predetermined pattern.bar code density,nthe number of characters that can berepresented in a lineal inch.(See symbol density).bar code label,nan adhesive-backed carrier bearing printedbar code information suitable for a affixing to an apparatus,equipment,or container surface.bar code readersee bar code scanner.bar code scanner,na device used to identify and decode abar code symbol.bar code symbol,nan array of rectangular bars and spaces,arranged in a predetermined pattern,following specific rulesthat represent elements of data referred to as characters.DISCUSSIONTypical bar code symbols contain a leading quiet zone,start character,data characters,check characters(if any),stop characterand a trailing quiet zone.Examples are:UPC code,Code 11,Code 39,Code 128,2 of 5 code and Codabar.bar height,nthe dimension of a symbol element perpendicu-lar to its width.bar reflectance(Rb),nthe smallest reflectance value in abar.bar width,nthe thickness of a bar measured from the edgeclosest to the symbol start character to the trailing edge ofthe same bar.bar width ratio,nin symbologies having two widths,theratio of the widest to the narrowest width within the bar codesymbol.(See also wide to narrow ratio.)bar width reduction,na diminution of the nominal barwidth dimension on film masters or printing plates tocompensate for systematic errors in some printing processes.1This terminology is under the jurisdiction of ASTM Committee F05 onBusiness Imaging Products and is the direct responsibility of Subcommittee F05.01on Nomenclature and Definitions.Current edition approved Oct.1,2009.Published November 2009.Originallyapproved in 1997.Last previous edition approved in 2003 as F1294 97a(2003).DOI:10.1520/F129497AR09.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 base side,adjwhen referring to a film master,the nonimagebearing side(See also the reverse,emulsion side.)bearer bars,nsolid lines that are located at the perimeter ofsome bar code symbols whose purpose is to reduce partial,incorrect scans and support the printing plate.Bearer bars donot contain information.bi-directional,adjin reference to bar codes,symbologiesthat may be decoded whether scanned in one direction or thereverse direction.charge coupled device,CCD,nan array(linear or matrix)oftransductive elements wherein packets of electrons are set ineach element as a result of the quantity of light receivedduring an exposure interval,and where these packets arerecovered from the array in the form of a pulse height-modulated electric signal.characters,nin bar code symbols,the smallest group ofelements that represent one or more numbers,letters,punc-tuation marks or other information.character set,nthose characters available for encodation ina particular automat