基于小波树的混沌图像盲水印技术

提出了一种基于小波树结构的新型盲图像数字水印方案。其特点在于：混沌置乱水印增强水印安全性；充分利用人类视觉掩蔽特性，将水印信息嵌入到载体图像零树小波中的重要树节点上；提取水印方便，无需原始载体图像。实验结果表明：该盲水印技术不仅具有较好的不可见性，而且对JPEG压缩、叠加噪声、图像增强、几何剪切等攻击均具有较好的鲁棒性。

Blind watermarking algorithm based on wavelet tree and chaotic scrambling

A new blind image watermarking algorithm based on the wavelet tree structure was proposed, which featured the following characteristics as scrambling the watermark to enhance the security, taking advantage of the human visual system properties and extracting the watermark without original image. The experimental results show that the proposed blind image watermarking scheme is invisible and robust against various signal processing attacks such as compression, noise adding, image enhancement, cropping and so on.