可无损恢复的小波域可见数字水印算法

文章研究了可无损恢复的小波域可见数字水印算法,该算法是为了适应将可见水印作为标签或版权标识,并且接收端的授权用户可将水印完全去除的应用环境。该算法基于亮度对比模型,并结合用户密钥将水印图像特征自适应嵌入到宿主图像的高频和低频系数中。实验结果表明,该算法嵌入的水印具有较强的鲁棒性,授权用户可无损恢复出原始图像,反之,非授权用户则不能在保证图像质量的前提下完全去除水印。

Removable Visible Watermarking Algoritham Based on Wavelet Transformation

This paper proposes a reversible visible watermarking algorithm based on wavelet transform to satisfy a new application scenario where the visible watermark serves as a tag or ownership identifier, but can be completely removed at the receiver end to resume the original image. For our removable visible watermarking algorithm, we compute composite coefficients using characteristics of the host and watermark image in the discrete wavelet transform (DWT) domain. The visible watermark is securely embedded based...