ISO/IEC 18004:2015
Information technology — Automatic identification and data capture techniques — QR Code bar code symbology specification
ISO/IEC 18004:2015 defines the requirements for the symbology known as QR Code. It specifies the QR Code symbology characteristics, data character encoding methods, symbol formats, dimensional characteristics, error correction rules, reference decoding algorithm, production quality requirements, and user-selectable application parameters.
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Foreword
Introduction
1 Scope
2 Conformance
3 Normative references
4 Terms and definitions
5 Mathematical and logical symbols, abbreviations and conventions
5.1 Mathematical and logical symbols
5.2 Abbreviations
5.3 Conventions
5.3.1 Module positions
5.3.2 Byte notation
5.3.3 Version references
6 Symbol description
6.1 Basic characteristics
6.2 Summary of additional features
6.3 Symbol structure
6.3.1 General
6.3.2 Symbol Versions and sizes
6.3.3 Finder pattern
6.3.4 Separator
6.3.5 Timing pattern
6.3.6 Alignment patterns
6.3.7 Encoding region
6.3.8 Quiet zone
7 Requirements
7.1 Encode procedure overview
7.2 Data analysis
7.3 Modes
7.3.1 General
7.3.2 Extended Channel Interpretation (ECI) mode
7.3.3 Numeric mode
7.3.4 Alphanumeric mode
7.3.5 Byte mode
7.3.6 Kanji mode
7.3.7 Mixing modes
7.3.8 Structured Append mode
7.3.9 FNC1 mode
7.4 Data encoding
7.4.1 Sequence of data
7.4.2 Extended Channel Interpretation (ECI) mode
7.4.3 Numeric mode
7.4.4 Alphanumeric mode
7.4.5 Byte mode
7.4.6 Kanji mode
7.4.7 Mixing modes
7.4.8 FNC1 modes
7.4.9 Terminator
7.4.10 Bit stream to codeword conversion
7.5 Error correction
7.5.1 Error correction capacity
7.5.2 Generating the error correction codewords
7.6 Constructing the final message codeword sequence
7.7 Codeword placement in matrix
7.7.1 Symbol character representation
7.7.2 Function pattern placement
7.7.3 Symbol character placement
7.8 Data masking
7.8.1 General
7.8.2 Data mask patterns
7.8.3 Evaluation of data masking results
7.9 Format information
7.9.1 QR Code symbols
7.9.2 Micro QR Code symbols
7.10 Version information
8 Structured Append
8.1 Basic principles
8.2 Symbol Sequence Indicator
8.3 Parity Data
9 Symbol printing and marking
9.1 Dimensions
9.2 Human-readable interpretation
9.3 Marking guidelines
10 Symbol quality
10.1 Methodology
10.2 Symbol quality parameters
10.2.1 Fixed pattern damage
10.2.2 Scan grade and overall symbol grade
10.2.3 Grid non-uniformity
10.3 Process control measurements
11 Decoding procedure overview
12 Reference decode algorithm for QR Code
13 Autodiscrimination capability
14 Transmitted data
14.1 General principles
14.2 Symbology Identifier
14.3 Extended Channel Interpretations
14.4 FNC1
Annex A (normative) Error detection and correction generator polynomials
Annex B (normative) Error correction decoding steps
Annex C (normative) Format information
Annex D (normative) Version information
Annex E (normative) Position of alignment patterns
Annex F (normative) Symbology Identifier
Annex G (normative) QR Code print quality – symbology-specific aspects
Annex H (informative) JIS8 and Shift JIS character sets
Annex I (informative) Symbol encoding examples
Annex J (informative) Optimisation of bit stream length
Annex K (informative) User guidelines for printing and scanning of QR Code symbols
Annex L (informative) Autodiscrimination
Annex M (informative) Process control techniques
Annex N (informative) Characteristics of Model 1 symbols
Bibliography
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Foreword
Introduction
1 Scope
2 Conformance
3 Normative references
4 Terms and definitions
5 Mathematical and logical symbols, abbreviations and conventions
5.1 Mathematical and logical symbols
5.2 Abbreviations
5.3 Conventions
5.3.1 Module positions
5.3.2 Byte notation
5.3.3 Version references
6 Symbol description
6.1 Basic characteristics
6.2 Summary of additional features
6.3 Symbol structure
6.3.1 General
6.3.2 Symbol Versions and sizes
6.3.3 Finder pattern
6.3.4 Separator
6.3.5 Timing pattern
6.3.6 Alignment patterns
6.3.7 Encoding region
6.3.8 Quiet zone
7 Requirements
7.1 Encode procedure overview
7.2 Data analysis
7.3 Modes
7.3.1 General
7.3.2 Extended Channel Interpretation (ECI) mode
7.3.3 Numeric mode
7.3.4 Alphanumeric mode
7.3.5 Byte mode
7.3.6 Kanji mode
7.3.7 Mixing modes
7.3.8 Structured Append mode
7.3.9 FNC1 mode
7.4 Data encoding
7.4.1 Sequence of data
7.4.2 Extended Channel Interpretation (ECI) mode
7.4.3 Numeric mode
7.4.4 Alphanumeric mode
7.4.5 Byte mode
7.4.6 Kanji mode
7.4.7 Mixing modes
7.4.8 FNC1 modes
7.4.9 Terminator
7.4.10 Bit stream to codeword conversion
7.5 Error correction
7.5.1 Error correction capacity
7.5.2 Generating the error correction codewords
7.6 Constructing the final message codeword sequence
7.7 Codeword placement in matrix
7.7.1 Symbol character representation
7.7.2 Function pattern placement
7.7.3 Symbol character placement
7.8 Data masking
7.8.1 General
7.8.2 Data mask patterns
7.8.3 Evaluation of data masking results
7.9 Format information
7.9.1 QR Code symbols
7.9.2 Micro QR Code symbols
7.10 Version information
8 Structured Append
8.1 Basic principles
8.2 Symbol Sequence Indicator
8.3 Parity Data
9 Symbol printing and marking
9.1 Dimensions
9.2 Human-readable interpretation
9.3 Marking guidelines
10 Symbol quality
10.1 Methodology
10.2 Symbol quality parameters
10.2.1 Fixed pattern damage
10.2.2 Scan grade and overall symbol grade
10.2.3 Grid non-uniformity
10.3 Process control measurements
11 Decoding procedure overview
12 Reference decode algorithm for QR Code
13 Autodiscrimination capability
14 Transmitted data
14.1 General principles
14.2 Symbology Identifier
14.3 Extended Channel Interpretations
14.4 FNC1
Annex A (normative) Error detection and correction generator polynomials
Annex B (normative) Error correction decoding steps
Annex C (normative) Format information
Annex D (normative) Version information
Annex E (normative) Position of alignment patterns
Annex F (normative) Symbology Identifier
Annex G (normative) QR Code print quality – symbology-specific aspects
Annex H (informative) JIS8 and Shift JIS character sets
Annex I (informative) Symbol encoding examples
Annex J (informative) Optimisation of bit stream length
Annex K (informative) User guidelines for printing and scanning of QR Code symbols
Annex L (informative) Autodiscrimination
Annex M (informative) Process control techniques
Annex N (informative) Characteristics of Model 1 symbols
Bibliography