A Robust DHWT
Based AES Encrypted Image Watermarking Scheme
Maheswari Sureshbabu1, Rameshwaran Kalimuthu2 and Chandra Vadivel3
1Department of Electrical and Electronics Engineering, Kongu Engineering College, India
2Department of Electronics and Communication Engineering, Shanmuganathan Engineering College, India
3Department of Electronics and Communication Engineering, Institute
of Engineering and Technology, India
Abstract: In this paper, we propose the blind
watermarking algorithm based on Double Haar Wavelet Transform (DHWT) for
copyright protection of encrypted images. Watermark embedding is performed in
wavelet transform domain. DHWT is applied to the original cover image and
binary watermark. Selected subband is encrypted by Advanced Encryption Standard
(AES) encryption scheme. Singular Value Decomposition (SVD) is applied on
selected subband of both the cover image and binary watermark. Eigen values of
selected subband of cover image are modified by the Eigen values of the
selected subband of binary watermark. Experimental results show that the
proposed algorithm achieves very high imperceptibility which is evidenced by
high Peak Signal to Noise Ratio (PSNR)
value for various gray scale encrypted images. Also, it produces very high
robustness against various types of image processing attacks.
Keywords: DHWT, AES encryption, SVD, digital watermarking.
Received October 28,
2013; accepted May 15, 2014