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中文摘要：
在借鉴传统通信模型的基础上提出了图像数字水印系统的通信模型,从信息论的角度研究水印系统的性能,对水印算法设计中所涉及到的嵌入强度、嵌入位置和水印信道的容量等问题进行了理论分析,并推导出有效提取水印的信噪比下界。根据理论结果设计的水印算法具有良好的不可感知性和鲁棒性,最后实验结果表明了该分析和计算的有效性及可行性。
英文摘要：
The communication system model of digital image watermarking is proposed by using its traditional one. The performance of watermarking system is investigated based on information theory, and the intensity and position embedded and the capacity of watermarking channel is analyzed and calculated, the lower bound of signal-to-noise rate for effectual extraction of watermark is obtained.The simulations show that the theoretic analysis is correct and the watermarking algorithms derived from theoretic result have good transparency and robustness.
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