The QR Code barcode is a variable-length, alphanumeric 2D barcode with Reed Solomon Error Correction. QR Codes are one of the only barcodes that can encode Japanese Kanji characters.
The following example barcode encodes the information "Barcode Xpress - QR Code"
as a QR Code barcode:
QR Codes encode different data types, and the maximum amount of data that can be encoded depends on the type. The QR Code can encode:
QR Codes also have user-selectable levels of error correction. More error correction means less data can be encoded in the barcode. These are the four levels of QR Code error correction:
The QR Code consists of two main components:
The QR Code is governed by ISO/IEC 18004:2015. 1
Caution: When using trial (unpaid) licensing, the words " UNLICENSED accusoft.com " will appear in the middle of every Data Matrix, QR Code and PDF417 barcode created, taking up 25 bytes of space. When testing the contents of generated barcodes, be aware of the extra space requirements.
If using the 1D/2D Standard or 1D/2D Professional editions, 2D writes are supported for QR Code using an external application. Typically, this can be done using the ImagXpress control or by writing to a Printer Device Context. The external application will set the barcode writing parameters and make a call to the Create method. The output image will then be available in the image properties. Included features to use for this functionality are:
Caution: When using trial (unpaid) licensing, the words " UNLICENSED accusoft.com " will appear in the middle of every Data Matrix, QR Code and PDF417 barcode created, taking up 25 bytes of space including the leading and trailing spaces. When testing the contents of generated barcodes, be aware of the extra space requirements.
The 1D/2D Professional edition supports creating QR Code, PDF417, and Data Matrix barcodes which can then be written using the ImagXpress control or by writing to a Printer Device Context. Your application logic will set the barcode writing parameters and make a call to the MakeBarcode method. The output image will then be returned in the call. Included features to use with this functionality are:
The QR Code barcode is similar to the Aztec, except the finder pattern is in the corners, rather than the center. This makes preprocessing operations like deskewing easier, but makes the symbol have less data density.
For more information, see the Barcode Xpress SDK product page or try our online demos.