A hybrid DCT-SVD based robust watermarking scheme for copyright protection

Author

Singh, Prashant ; Agarwal, Sankalp

Author_Institution

GIS Cell, Motilal Nehru Nat. Inst. of Technol., Allahabad, India

fYear

2013

fDate

9-12 Sept. 2013

Firstpage

1

Lastpage

5

Abstract

A hybrid watermarking scheme exploiting the properties of the Discrete Cosine Transform (DCT) and Singular Value Decomposition(SVD) has been proposed here. A reference image is being formed from the cover image and then its singular values are modified to hide the secret information in an imperceptible way. The security is further enhanced by the zig zag scrambling of the cover image and gray scale watermarks. The robustness of the methodology against the various image processing attacks has been validated with high Normalized Cross Correlation (NCC) values. Also, the imperceptibility of the watermarked image with the original cover image comes out to be high as indicated by high achievable Peak Signal to Noise Ratio (PSNR) values.

Keywords

correlation methods; discrete cosine transforms; image watermarking; singular value decomposition; NCC values; PSNR values; copyright protection; cover image; discrete cosine transform; gray scale watermarks; hybrid DCT- SVD-based robust watermarking scheme; image processing attacks; normalized cross-correlation values; peak signal-to-noise ratio values; reference image; secret information; singular value decomposition; singular values; watermarked image imperceptibility; zig zag scrambling; Discrete cosine transforms; Frequency-domain analysis; PSNR; Robustness; Singular value decomposition; Watermarking; Discrete Cosine Transform(DCT); Normalized Cross Correlation(NCC); Peak Signal to Noise Ratio(PSNR); Reference Image; Singular Value Decomposition (SVD);

fLanguage

English

Publisher

ieee

Conference_Titel

AFRICON, 2013

Conference_Location

Pointe-Aux-Piments

ISSN

2153-0025

Print_ISBN

978-1-4673-5940-5

Type

conf

DOI

10.1109/AFRCON.2013.6757709

Filename

6757709