ISO IEC 18004:2015 pdf free

ISO IEC 18004:2015 pdf free.Information technology一Automatic identification and data capture techniques
QR Code symbols (and equipment designed to produce or read QR Code symbols) shall be considered as conforming with this International Standard if they provide or support the features defined in this International Standard.
Symbols complying with the requirements for QR Code Model 1, as described in ISO/IEC 18004:2006,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, are readable with equipment complying with this International Standard.
Reading equipment complying with ISO/IEC 18004:2000 will not be able to read all symbols complying with this International Standard. Symbols that make use of the additional features of QR Code will not be readable by such equipment.
Printing equipment complying with ISO/IEC 18004:2000 will not be able to print all symbols defined in this International Standard. Symbols that make use of the additional features of QR Code will not be printable by such equipment.
It should be noted, however, that QR Code Model 2 and Micro QR Code are the form of the symbology recommended for new and open systems applications.
The use of the following additional features is optional in QR Code:
– Structured append
This allows files of data to be represented logically and continuously in up to 16 QR Code symbols.These may be scanned in any sequence to enable the original data to be correctly reconstructed.Structured Append is not available with Micro QR Code symbols.
– Extended Channel Interpretations
This mechanism enables data using character sets other than the default encodable set (e.g. Arabic,Cyrillic, Greek) and other data interpretations (e.g. compacted data using defined compression schemes) or other industry-specific requirements to be encoded. Extended Channel Interpretations other than the default interpretation are not available in Micro QR Code symbols.
– Reflectance reversal
Symbols are intended to be read when marked so that the image is either dark on light or light on dark (see Figures 1 and 2). The specifications in this International Standard are based on dark images on a light background, therefore in the case of symbols produced with reflectance reversal references to dark or light modules should be taken as references to light or dark modules respectively.
– Mirror imaging
The arrangement of modules defined in this International Standard represents the “normal”orientation of the symbol. It is, however, possible to achieve a valid decode of a symbol in which the arrangement of the modules has been laterally transposed. When viewed with the finder patterns at the top left, top right and bottom left corners of the symbol, the effect of mirror imaging is to interchange the row and column positions of the modules.ISO IEC 18004 pdf download.