1. D. Kumawat, R.K. Singh, D. Gupta, S. Gupta, Impact of denoising using various filters on QR code. International Journal of Computer Applications 63(5) (2013)
2. M.W. Islam, A novel QR code guided image stenographic technique. IEEE International Conference on Consumer Electronics (ICCE). IEEE (2013)
3. B.C. Nguyen, S.M. Yoon, H.-K. Lee, Multi-bit plane image steganography. Department of EECS, Korea Advanced Institute of Science and Technology, Guseong-dong, Yuseong-gu, Daejeon, Republic of Korea (2006)
4. V. Hajduk, O. Martin Broda, L. Dušan, Image stegano-graphy with using QR code and cryptography, in 26th International Conference, Radioelektronika (RADIOELEKTRONIKA). IEEE (2016), pp. 350–353
5. A. Basit, M. Y. Javed, Iris localization via intensity gradient and recognition through bit planes. Department of Computer Engineering, College of Electrical and Mechanical Engineering, National University of Sciences and Technology (Nust), Peshawar Road, Rawalpindi, Pakistan