Decoding Different Patterns in Various Grey Tones Incorporated in the QR Code

Abstract

This paper explores the dependence of reliable decoding of grey toned QR codes on the technical characteristics of smartphone cameras marketed in the period between 2008 and 2012. The research consisted of taking a total of 12,150 QR code pictures with different grey tones, graphic patterns and error correction codes. This research answers the question whether today’s smartphones can decode such designed QR codes. The data and instructions on the quantity and size of a certain grey tone incorporated in the QR code that are sufficient to decode the researched symbology have also been given. Graphic designers can use the results of this research to make QR codes that do not drastically reduce reliability.