1. Barni, M., Bartolini, F., Cappellini, B., & Piva, A. (1998). DCT domain system for robust image watermarking. Signal Processing, 66, 357–372.
2. Madhu, B., Holi, G., & Srikanta Murthy, K. (2016). An overview of image security techniques. International Journal of Computer Applications, 154(6), 37–46.
3. Fraser, S. I., Allen, A. R.. (2012). A high capacity reversible watermarking techniques based on difference expansion. In: Proceedings of signal and image processing SIP-2008, Kailua-Kona, HI, USA.
4. Khanna, A. K., Roy, N. R., & Verma, B. (2016). Digital image watermarking and its optimization using genetic algorithm. In International conference on computing, communication and automation (ICCCA). IEEE.
5. Rao, R. S. P., & Kumar, P. R. (2016). An efficient genetic algorithm based gray scale digital image watermarking for improving the robustness and imperceptibility. In International conference on electrical, electronics, and optimization techniques (ICEEOT). IEEE.