【摘要】 提出了一种小波包特征熵分解的自适应图像水印算法。该算法通过对宿主图像进行小波包特征熵分解,在高频系数中选取合适的阈值来区分高频系数中图像的纹理细节信息和噪声信息,将水印信息自适应地嵌入到高频系数当中。实验表明,该水印算法对噪声、JPEG2000压缩、滤波、改变对比度、几何剪切等攻击都具有一定的健壮性。更多还原

【Abstract】 An adaptive image watermarking algorithm based on wavelet packet decomposition of characteristic entropy is proposed.After the host image is decomposed by the wavelet packet of characteristics entropy,the watermarking will be adaptively embedded in the high-frequency coefficients,which are distinguished between the image texture detail information and noise information by a suitable threshold.The experiments show that the algorithm has a certain robustness to the attacks including noise,JPEG2000,filtering,changing the contrast,and geometric cut,etc.更多还原