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

fYear

2010

fDate

9-11 Dec. 2010

Firstpage

70

Lastpage

75

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/VCON.2010.21

Filename

5693000