QR Code
QR Code is the most well-known 2D matrix symbology, originally developed in 1994 by Denso Wave, it is used in a wide variety of industries and applications.
A sample QR Code is shown below.
Symbology Characteristics
Configuration name |
|
ISO specification | ISO/IEC 18004 |
Encodable character set | All 8-bit values can be encoded. |
Capacity | The largest symbol can encode up to 7'098 numeric characters, 4'296 alphanumeric characters, 2'953 bytes of binary data or 1'817 kanji characters. |
Integrity protection | Reed-Solomon error correction, selectable (four levels) |
Quiet zone | A quiet zone of four modules (4X) is required around the symbol. |
QR Code is a registered trademark of DENSO WAVE INCORPORATED.
Configuration Options
Option | Description | Sample Configuration | Default |
|---|---|---|---|
roundedFPs | Toggle recognition of QR codes with rounded finder patterns |
const config = {
engine: {
symbologies: [
{ name: "qr", roundedFPs: true }
]
}
}
| false |
curved | Toggle recognition of QR codes on curved surfaces |
const config = {
engine: {
symbologies: [
{ name: "qr", curved: true }
]
}
}
| false |
Limitations
The following elements of the ISO specification are not implemented:
Micro QR Code is not supported
ECI (Extended Channel Interpretation)
Structured Append
Model 1 QR Codes
ISO/IEC 18004:2006 stopped mentioning this first iteration of QR Code in 2006, and redefined QR Code to mean Model 2 QR Code, so we do not consider it relevant in today's landscape.
