Choosing the right technique for the robust watermark

Joint Authors

al-Hamami, Ala H.
Shayib, Fida Mahmud

Source

International Computer Sciences and Informatics Conference, Amman, Jordan 12-13 January 2016.

Publisher

Amman Arab University

Publication Date

2016-01-31

Country of Publication

Jordan

No. of Pages

11

Main Subjects

Information Technology and Computer Science

English Abstract

In this paper, the proposed approach for digital image watermarking raises the combination of redundant discrete wavelet transform (RDWT) and Contourlet Transform (CT_RDWT and RDWT_CT).

It is expected from this combination to cover multi-scale, time-frequency, localization, shift invariance of RDWT and offers directionality and anisotropy supported by Contourlet Transform (CT) that will lead to improve resistance to most of the attacks, and protect copyright and repository.

Based on the results of these two methods, we can choose the best to achieve the watermarking objectives.

In both methods; RDWT_CT and CT_RDWT, two-level decomposition is applied to the host image, and onelevel decomposition is applied to the watermark image.

Embedding the two high frequency mid-bands of the watermark image in the two high frequency mid-bands of the host is tested, and then best is chosen for watermarking.

Watermarked image is exposed to different types of attacks ; Peak Signal-to-Noise Ratio (PSNR) value which represents imperceptibility and CORR value which represent robustness are calculated before and after attacks.

Results showed that the combination CT_RDWT is better than the combination RDWT_CT.

Data Type

Conference Papers

Record ID

BIM-767304

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