The rapid increase of digitized media because of the proliferation of networked multimedia has created many issues like related to copyright protection, easily copying and transmitting the digital data. This has created the need for various techniques which helps to protect the digital media over the internet. Digital watermarking is one of the solutions. Digital watermarking is a technique which is used to hide the ownership information in the digital media. In this paper, we have implemented a technique based on Bacterial Foraging Optimization (BFO) for watermarking the digital image. The work has been implemented in the MATLAB and the results show its robustness against the various attacks. The quality parameters such as PSNR, MSE and Similarity Ratio are also being used to check the quality of watermarked image which provides the satisfactory results.

1. Ali Al-Haj, "Combined DWT-DCT Digital Image Watermarking", Journal of Computer Science 3 (9): 740-746, 2007
2. Vidyasagar M. Potdar, Song Han, Elizabeth Chang "A Survey of Digital Image Watermarking Techniques" 3rd International Conference on Industrial Informatics (INDIN 2005)©2005 IEEE
3. Frank Hartung, Martin Kutter, "Multimedia Watermarking Techniques", Proceedings of the IEEE , Vol 87, NO. 7, JULY 1999
4. K. Tanaka, Y. Nakamura, and K. Matsui, "Embedding secret information into a dithered multilevel image," in Proc. 1990 IEEE Military Commun. Conf. , Sept. 1990, pp. 216–220.
5. "Embedding the attribute information into a dithered image," Syst. Comput. Japan, vol. 21, no. 7, 1990
6. A. Tirkel, G. Rankin, R. van Schyndel, W. Ho, N. Mee, and C. Osborne, "Electronic water mark," in Proc. DICTA 1993, Dec 1993, pp. 666–672
7. M. Barni, F. Bartolini, V. Cappellini, A. Piva and F. Rigacci, "A M. A. P. Identification criterion for DCT based Watermarking," in Proc. Europ Signal Processing Conf. (EUSIPCO'98),Rhodes , Greece, Sept 1998.
8. B. Chen and G. W. Wornell, "Digital watermarking and information embedding using dither modulation," in Proc IEEE workshop multimedia signal Processing, Los Angeles,C. A,Dec 1998
9. "Dither modulation: A new approach to the design of digital watermarking and information ebedding" in IS&T/SPIE's 11th Annu. Symp. Electronic Imaging'99: Security and watermarking of multimedia contents, vol 3657,'San Jose,CA, Jan 1999
10. I. J Cox, J. Kilian, F. T. Leighton, and T. Shamoon, "Secure spread spectrum watermarking for multimedia" in IEEE Transactions on Image Processing, vol. 6, no. 12, Dec. 1997, pp:1673 -1687
11. Kundur. D. , Hatzinakos, D. , "Digital Watermarking using Multiresolution Wavelet Decomposition", Proc. IEEE Int. Conf. On Acoustics, Speech and Signal Processing, Seattle, Washington, vol. 5, pp. 2969-2972, May 1998.
12. Heena, Dr. Himanshu Aggarwal, "Color Image Quantization Based on Euclidean Distance Using Bacteria Foraging Optimization",IJECSE Volume1,Number 4 , pp 2285 -2290

Digital Watermarking Bacterial Foraging Optimization Bfo Psnr mse