DocumentCode :
2561067
Title :
A Wavelet-Domain Watermarking Algorithm against Geometric Attacks Based on SUSAN Feature Points
Author :
Liu, Lv-Ming ; Han, Guo-qiang ; Wo, Yan ; Wang, Cheng-Si
Author_Institution :
Sch. of Comput. Sci. & Eng., South China Univ. of Technol., Guangzhou, China
fYear :
2010
fDate :
23-25 Sept. 2010
Firstpage :
1
Lastpage :
5
Abstract :
Image watermark resistant to geometric attacks is the focus and difficulty point in the current research on watermarking. This paper proposes a Wavelet-domain watermarking algorithm against geometric attacks based on the SUSAN feature points matching. The algorithm embeds watermarks into each sub-band of the wavelet coefficients of the host image with different strength adaptively adjusted in terms of the gray level of them. The choice of the embedding strategy effectively guarantees good transparency and strong robustness of the watermark. Furthermore, the paper improves the SUSAN operator, to extract the feature points robust to geometric distortion from the watermarked image. Before watermark detection, it uses the transformation of the corresponding points to correct geometric distortion, which ensures successful extraction of the watermark. Experiment results show that the proposed algorithm has good transparency, and it is also robust to common image processing and geometric attacks.
Keywords :
feature extraction; image coding; image colour analysis; image matching; watermarking; wavelet transforms; SUSAN feature points matching; feature point extraction; geometric attack resistance; geometric attacks; gray level; image watermark; watermark detection; wavelet-domain watermarking algorithm; Algorithm design and analysis; Feature extraction; Pixel; Robustness; Shearing; Watermarking; Wavelet transforms;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications Networking and Mobile Computing (WiCOM), 2010 6th International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-3708-5
Electronic_ISBN :
978-1-4244-3709-2
Type :
conf
DOI :
10.1109/WICOM.2010.5601016
Filename :
5601016
Link To Document :
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