1. A T COMMUNICATIONS CO., L. (2007) LogoQnet. [Online]:
http://logoq.net/
. Accessed 12 June 2017
2. Armstrong P (2017) Apple just made QR codes a must have for your strategy. Forbes. [Online]:
https://www.forbes.com/sites/paularmstrongtech/2017/09/22/apple-just-made-qr-codes-a-must-have-for-your-strategy/#43e0da7150dd
. Accessed 27 Jan 2018
3. Beegan AP, Iyer LR, Bell AE (2002) Design and evaluation of perceptual masks for wavelet image compression. In: Proceedings 10th IEEE digital signal processing workshop. IEEE CS Press, pp 88–93
4. Bekkat N, Saadane A (2004) Coded image quality assessment based on a new contrast masking model. J Electronic Imaging 13:341–348
5. Braudaway GW, Magerlein KA, Mintzer FC (1996) Protecting publicly available images with a visible image watermark. In: Proc. SPIE, Int. conf. Electronic imaging, vol 2659, pp 126–132