About QRCode.ie

QRCode.ie is part of OSD Digital Agency, delivering digital solutions for over 15 years, established in Sligo in 2000. OSD was created to meet the demand of businesses, which needed digital expertise to further enhance their existing business online.

Our team of creative, technical and strategic specialists work with a wide range of clients across a diverse range of digital projects from our offices in Sligo and Dublin.

OSD Digital Agency is owned and run by Catriona Walsh, Marie Harkin and Victor Leonard, a dynamic and diverse management team whose skills complement each other. We offer a complete service provision, looking after all aspects of Digital Strategy.

About QR Codes

QR Codes have been common in Japan for many years and now gaining more exposure in Europe and the United States. The QR Code standard was developed by Denso Wave in Japan, released in 1994 and initially used for tracking parts.

QR Codes contain information in both horizontal and vertical directions compared to a single direction barcode.

The QR Code is defined and published as ISO standard and QR Codes obviously look different to each other depending on the data encoded but the only significant no data variations are the number of elements / dots needed to store the data within.

QR Code Versions
Version 1 21 x 21 array of data elements
Version 2 25 x 25 array of data elements
Version 3 29 x 29 array of data elements
Version 4 3 x 33 array of data elements
Version 5 37 x 37 array of data elements

With most mobile phones or PDAs today a suggestion of Version 4 or lower with QR Code image being 2 cm, roughly 0.85 inches. QR Codes also include Position Alignment Markers, Error Correction data and Calibration of its Orientation.

This allows the QR Code to be scanned if it is upside down, at an angle or on a curved surface.

QR Code Data Capacity
Numeric only Max. 7,089 characters
Alphanumeric Max. 4,296 characters
Binary (8 bits) Max. 2,953 bytes
Kanji/Kana Max. 1,817 characters

(Above Data Capacity from Denso Wave)

Error Correction Capacity
Level L 7% of codewords can be restored.
Level M 15% of codewords can be restored.
Level Q 25% of codewords can be restored.
Level H 30% of codewords can be restored.

QRCode.ie - About QR Codes, background of QR Codes, how QR Codes work and various information on QR Codes