BS ISO IEC 18004-2015 pdf free download – Information technology — Automatic identification and data capture techniques — QR Code bar code symbology specification.
This International Standard defines the requirements for the symbology known as QR Code. It specifiesthe QR Code symbology characteristics, data characterencoding methods, symbol formats, dimensionalcharacteristics,error correction rules, reference decoding algorithm, production quality requirements,and user-selectable application parameters.
2Conformance
QR Code symbols (and equipment designed to produce or read QR Code symbols) shall be consideredas conforming with this international Standard if they provide or support the features defined in thislnternational Standard.
Symbols complying with the requirements for QR Code Model 1, as described in ISO/IEC18004:2006,may not be readable with equipment complying with this International Standard.
Symbols complying with the requirements for QR Code Model 2, as defined in ISO/IEC 18004:2000, arereadable with equipment complying with this International Standard.
Reading equipment complying with ISO/IEC 18004:2000 will not be able to read all symbols complyingwith this International Standard.Symbols that make use of the additional features of QR Code will notbe readable by such equipment.
Printing equipment complying with ISO/IEC 18004:2000 will not be able to print all symbols definedin this International Standard. Symbols that make use of the additional features of QR Code will not beprintable by such equipment.
lt should be noted, however, that QR Code Model 2 and Micro QR Code are the form of the symbologyrecommended for new and open systems applications.
3 Normative references
The following documents, in whole or in part, are normatively referenced in this document and areindispensable for its application. For dated references,only the edition cited applies. For undatedreferences, the latest edition of the referenced document (including any amendments) applies.
ISO/IEC 8859-1:1998,Information technology — 8-bit single-byte coded graphic character sets —Part 1:Latin alphabet No.1
ISO/IEC 15415, Information technology — Automatic identification and data capture techniques — Barcode symbol print quality test specification —Two-dimensional symbols
ISO/IEC19762-1,Information technology—Automatic identification and data capture(AIDC)techniques—Harmonized vocabulary — Part 1: General terms relating to AIDc
ISO/IEC 19762-2,Information technology—Automatic identification and data capture (AIDC) techniques —Harmonized vocabulary — Part 2: Optically readable media (ORM)
JIS x0201,7-bit and 8-bit coded character sets for information interchange
4 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC19762-1and ISO/IEC19762-2 and the following apply.
4.1
character count indicator
bit sequence which defines the data string length in a mode4.2
data masking
process of XORing the bit pattern in the encoding region with a data mask pattern to provide a symbolwith more evenly balanced numbers of dark and light modules, and reduced occurrence of patternswhich would interfere with fast processing of the image
4.3
data mask pattern reference
three-bit identifier of the data masking patterns applied to the symbol4.4
encoding region
region of the symbol not occupied by function patterns and available for encoding of data and errorcorrection codewords, and for Version and format information
4.5
exclusive subset
subset of characters within the character set of a mode which are not shared with the more restrictedcharacter set of another mode
4.6
extension pattern
function pattern in Model 1 symbols, which does not encode data4.7
format information
encoded pattern containing information on symbol characteristics essential to enable the remainder ofthe encoding region to be decoded
4.8
QR Code
pertaining to QR Code symbols identified as versions 1 to 40, as distinct from Micro QR Code symbols4.9
function pattern
overhead component of the symbol (finder, separator, timing patterns, and alignment patterns) requiredfor location of the symbol or identification of its characteristics to assist in decoding
4.10
masking
process of XORing the bit pattern in an area of the symbol with a mask pattern to reduce the occurrenceof patterns which would interfere with fast processing of the image.BS ISO IEC 18004 pdf download.