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Subsampling-based image watermarkng in compressed DCT domain

Main information
In this paper, a new embedding strategy for watermarking is presented based on DC components of subimages in compressed discrete cosine transform (DCT) domain. These subimages are obtained through subsampling the host image. More robustness has been achieved when watermarks are embedded in perceptually significant DC components. Furthermore, the original image is not required in the extraction process. Experimental results show that the proposed scheme successfully makes the watermark perceptually invisible and robust for a wide range of attacks, including JPEG-loss compression, filtering, scaling, and cropping attacks. 
No referenced Knowhow defined
WP5: Detection, Extraction and Annotation of Knowledge. 
School of Informatics University of Bradford  Jianmin Jiang, Ying Weng 
2008-05-24 23:17  Request for more detail


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For educational purposes only - if public document.  For educational purposes only - if public document. 


Protection Status
Copyright School of Informatics, University of Bradford.  Patent Protection not sought. 
Licensing Protection not sought.  Utility Model Protection not sought. 
 
Accepted for The 10th IASTED International Conference on Signal and Image Processing, August 18 – 20, 2008, USA  
Open, everybody can see the attachment 


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watermarking_sip.pdf
 
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