Combined DWT-CT Blind Digital Image Watermarking Algorithm

In this paper, we propose a new robust and secure system that is based on the combination between two different transforms Discrete wavelet Transform (DWT) and Contourlet Transform (CT). The combined transforms will compensate the drawback of using each transform separately. The proposed algorithm has been designed, implemented and tested successfully. The experimental results showed that selecting the best sub-band for embedding from both transforms will improve the imperceptibility and robustness of the new combined algorithm. The evaluated imperceptibility of the combined DWT-CT algorithm which gave a PSNR value 88.11 and the combination DWT-CT algorithm improves robustness since it produced better robust against Gaussian noise attack. In addition to that, the implemented system shored a successful extraction method to extract watermark efficiently.

Authors:

• Nidal F. Shilbayeh
• Belal AbuHaija
• Zainab N. Al-Qudsy

Keywords:

• DWT
• CT
• Digital Image Watermarking
• Copyright Protection.

References:

[1] Al-Haj, A. (2007), Combined DWT-DCT Digital Image Watermarking,
Journal of Computer Science, Vol. 3, No. 9, pp:740-746.
[2] Amirgholipour, S. & Naghsh-Nilchi, A. (2009), Robust Digital Image
Watermarking Based on Joint DWT-DCT, International Journal of
Digital Content Technology and its Applications, Vol.3, No. 2. pp:42-
55. doi: 10.4156/jdcta.vol3.issue2.amirgholipour
[3] Candik, M., Matus, E. & Levicky, D. (2001), Watermarking in Wavelet
Transform Domain, Radioengineering, Vol. 10, No. 2, pp:1-4.
[4] Do, M. & Vetterli, M. (2005), TheContourlet Transform: An Efficient
Directional Multiresolution Image Representation, IEEE Transactions on
Image Processing Image Processing, Vol.14, No. 12, pp:2091-2106.
[5] El rube-, I. ,Abou el Nasr, M. , Naim,M. & Farouk, M. (2009),
Contourlet Versus Wavelet Transform for Robust Digital Image
Watermarking Technique, wordAcademy of Science, Engineering and
Technology 60.
[6] Emek, S. & Pazarci, M. (2005) , A Cascade DWT-DCT Based on
Digital Watermarking Scheme, ,13th European Signal Processing,
Conference(EUSIPCO2005), Antalya, Turkey, Sept. 4-8 2005.
[7] Ghannam, S. & Abou-chadi, F. (2009), Contourlet Verses Wavelet
Transform: A Performance Study for a Robust Image Watermarking,.
Second International Conference Applications of Digital Information
and Web Technologies, on the 2009. ICADIWT '09.
[8] Jayalakshmi, M., Merchant, S. & Desia, B.(2006), Digital Watermarking
in Contourler Domain, The 18th International Conference on Pattern
Recognition, pp:861-864.
[9] Jiansheng, M., Sukang, L. & Xiaomei,T. (2009), A Digital
Watermarking Algorithm based on DCT and DWT, Proceedings of the
2009 International Symposium on Web Information Systems and
Applications (WISA-09 Nanchang, P. R. China, May 22-24, 2009, pp.
104-107.
[10] Khalighi, S. & Rabiee, H. (2009), A Contourlet-based Image
Watermarking Scheme with High Resistance to Removal and
Geometrical Attacks, EURASIP Journal on Advances in Signal
Processing, doi,10.1155/2010/540723.
[11] Shilbayeh N. & Ashimary A. (2010), Digital Watermark System Based
on Cascading Haar Wavelet Transform and Discrete Wavelet Transform,
Journal of Applied Science, Vol.10, No.19, pp. 2168-2186.