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- W2357932471 abstract "Image watermarking against geometric attacks remains to be the hotspot and challenging point in the present research on watermarking.The existing watermarking algorithms can not resist geometric attacks efficiently.For addressing the problem,a Contourlet-domain watermarking algorithm resistant to geometrical attacks based on QR code is proposed.The watermark in this paper is QR code encoded from text message.Firstly,the original image is decomposed by Contourlet transform.Then,the low-frequency sub-band of the Contourlet coefficients is divided into sub-blocks.Finally,each bit of QR code is embedded into each sub-block repeatedly.Experimental results demonstrate that this method can well resist attacks such as rotation,scaling,Gaussian noise,speckle noise,average filtering,Gaussian filtering and JPEG lossy compression,and its algorithm complexity is lower.In the phase of watermark extraction,the original image is not needed.The proposed algorithm is blind.The watermarking technology proposed can be widely used in copyright protection of digital products." @default.
- W2357932471 created "2016-06-24" @default.
- W2357932471 creator A5063427301 @default.
- W2357932471 date "2014-01-01" @default.
- W2357932471 modified "2023-09-23" @default.
- W2357932471 title "Digital watermarking scheme in Contourlet domain based on QR code" @default.
- W2357932471 hasPublicationYear "2014" @default.
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