Title :
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
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);
Conference_Titel :
AFRICON, 2013
Conference_Location :
Pointe-Aux-Piments
Print_ISBN :
978-1-4673-5940-5
DOI :
10.1109/AFRCON.2013.6757709
