A Technique to Add Error Detection of QR Code Decoding by Using Micro QR Code

This paper introduced method for error detection of the information in QR Code by using Micro QR Code, by creating a grayscale QR Code. Image processing technique is used before decoding. Image processing offer ability of fixing error and restore module that have been damage such as tear, stain or bend before decoding process. General QR Code has no error detection which helps to verify the correctness of information in QR Code. Therefore, the contents of Micro QR Code is generated using MD5 (Message-Digest Algorithm 5) and overlapping onto the three corners of Finder Pattern of standard QR Code. The experiment is conducted on QR Code version 5 and over. The decoding is done by focusing on the region of interest on the overlapped Micro QR Code. After that the binarization is done using multilevel-threshoding to separate the content of the Micro QR Code. The opening technique is used to remove edges, eliminate noises and compare the decoding data. 