A robust spread-spectrum watermarking method using two-level quantization
Ho, Anthony T. S. and Shu, Feng (2004) A robust spread-spectrum watermarking method using two-level quantization In: 2004 International Conference on Image Processing, 2004. ICIP '04..
In this paper, we introduce a new robust watermarking technique, which is called two-level quantization based spread-spectrum (TQSS). In this method, the selected transform coefficients of the cover signal are two-level quantized to a predefined threshold, which is determined by the estimated bound of distortion. The two-level quantizer is again used for watermark retrieval. Thus, the watermark signal is essentially embedded into the polarities of the transform coefficients. Our simulation results showed that TQSS outperformed some common spread-spectrum (SS) methods under a variety of attacks, such as lossy compression, additive Gaussian white noise, filtering, scaling and print-and-scan process.
|Item Type:||Conference or Workshop Item (UNSPECIFIED)|
|Additional Information:||This article was published when Anthony T. S. Ho was at Nanyang Technological University, Singapore. 2004 International Conference on Image Processing, 2004 (ICIP '04), Vol. 2, pp. 725- 728 .© 2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.|
|Divisions:||Faculty of Engineering and Physical Sciences > Computing Science|
|Deposited By:||Mr Adam Field|
|Deposited On:||27 May 2010 15:45|
|Last Modified:||26 Sep 2012 14:37|
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