Title :
A Robust Watermarking Algorithm Based on Image Normalization
Author :
Sridevi, T. ; Ramya, T. ; Ramadevi, Y. ; Kumar, V. Vignesh
Author_Institution :
Dept. of CSE, Chaitanya Bharathi Inst. of Technol., Hyderabad, India
Abstract :
Digital watermarking algorithms are prune to different attacks. Of these geometric attacks are recognized as one of the strongest attacks for digital watermarking technology. In this paper, we implemented a BNA(Blind Normalization Algorithm) watermarking algorithm resistant to geometrical distortions (rotation, scaling and aspect ratio)and different other attacks(histogram equalization, JPEG, noise) on different contrast images. This algorithm uses a normalized image based on the image moments. A CDMA scheme is used to embed a 256-bit random watermark in the discrete cosine transform domain of the normalized image. CDMA is a multilevel coding in order to achieve a high capacity watermarking scheme.
Keywords :
image coding; image watermarking; CDMA scheme; blind normalization algorithm; contrast image; digital watermarking algorithm; digital watermarking technology; discrete cosine transform domain; geometric attack; geometrical distortion; high capacity watermarking; image moment; image normalization; multilevel coding; normalized image; robust watermarking algorithm; BNA (Blind Normalization Algorithm); CDMA; DCT (discrete cosine transformation); geometric attacks; normalized image;
Conference_Titel :
Information Technology for Real World Problems (VCON), 2010 Second Vaagdevi International Conference on
Conference_Location :
Warangal
Print_ISBN :
978-1-4244-9628-0
DOI :
10.1109/VCON.2010.21
