小波域中的图像自适应水印算法

提出一种小波域透明图像水印算法,算法将一个二值图像内嵌到原始图像经过小波多分辨率分解后的低频子带上,根据低频系数和高频系数的特点以及树结构关系,并由图像的局部亮度和纹理特性对水印嵌入强度做自适应调节.实验结果表明:使用该算法嵌入的数字水印具有很好的隐蔽性,并且嵌入水印的图像对有损压缩、滤波、加入随机噪声和剪切等攻击操作具有较强的鲁棒性.

An adaptive image watermarking algorithm in wavelet transform domain

An approach for transparent image watermarking is proposed based on wavelet multiresolution decomposition in which a binary image is embedded in the original image; in the light of characteristic and tree structure relation of the wavelet coefficients, the embedding strength is determined by the local luminance feature and texture features of the image.Experimental results show that the embedded digital watermarking is invisible and robust enough against common image processing such as JPEG compression, filter, adding the stochastic noises and shearing.