Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16483
Title: Robust digital image watermarking based on subsampling
Authors: Lu, W
Lu, H
Chung, FL 
Keywords: Chaotic map
Copyright protection
Image watermarking
Subsampling
Issue Date: 2006
Publisher: Elsevier
Source: Applied mathematics and computation, 2006, v. 181, no. 2, p. 886-893 How to cite?
Journal: Applied mathematics and computation 
Abstract: This paper presents a robust digital watermarking scheme for copyright protection of digital images. Four subimages are obtained from the host image by using subsampling. A binary watermark image is permutated using chaotic map and then is embedded into the DCT coefficients of two of the subimages which are selected according to a random coordinates sequence generated by a secret key. Watermark extraction is simply by comparing the DCT coefficients of the watermarked subimages and does not need original image. Experimental results show good robustness and security of the proposed scheme.
URI: http://hdl.handle.net/10397/16483
ISSN: 0096-3003
EISSN: 1873-5649
DOI: 10.1016/j.amc.2006.02.012
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