【摘要】 水印的鲁棒性是当前数字水印技术研究的重点,它受水印嵌入方法与嵌入强度等因素的影响 本文提出了一种基于离散小波变换(DWT)的水印算法,在小波变换后中、低频的重要系数进行有意义水印的嵌入 实验结果表明,该算法具有较好的鲁棒性,能承受较大范围的嵌入强度,能够抵抗常见的信号处理操作、JPEG(联合图像专家组)压缩等攻击手段.更多还原

【Abstract】 Robustness is the emphasis for image watermarking research.Embeded strategy and the watermark strength affect robustness of watermarks.In this paper, a new algorithm based on the significant coefficients of DWT is proposed.The algorithm searches the significant coefficients of DWT, and embeds the watermark in the low and medium frequency significant coefficients.The experimental results show that the algorithm is robust against JPEG compress and common image process techniques.更多还原