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《Journal of Data Acquisition and Processing》 2011-01
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Blind Extraction Method for Spread-Spectrum Watermark on Digital Image

Xie Chunhui,Cheng Yimin,Chen Yangkun(Department of Electronic Science & Technology,University of Science & Technology of China,Hefei,230027,China)  
A blind extraction method of spread-spectrum watermark(SSW) on the digital image is presented.By using a genetic algorithm(GA) to solve the optimization problem of two variables with the length and the composition of the estimated sequence,the method can estimate the spread-spectrum(SS) sequence by the transmitter.Finally,the watermark can be blindly extracted by the correlation between the estimated SS sequence and the stego-signal.The method is tested based on the standard test images.Experimental results show that the estimation correction rate for SS sequence is high and the extracted watermark is identifed.
【CateGory Index】: TP309.7
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