基于小波变换的可见可逆数字水印算法

Removable visible watermark algorithm based on wavelet transform

提出了一种可无损恢复的小波域可见数字水印算法。算法采用视觉对比模型和人类视觉系统特性计算水印拉伸系数,并由用户密钥生成随机模板确定水印信息的嵌入位置。实验结果表明本算法具有很好的可见性和鲁棒性。

This paper proposes a reversible visible watermark algorithm based on wavelet transform. For our removable visible watermark algorithm, we compute composite coefficients using characteristics of the contrast sensitivity function（CSF）and human visual system （HVS） in the discrete wavelet transform （DWT） domain. The visible watermark is securely by employing a use-keycontroUed embedding mechanism. The numerous tests and the results obtained the superior visibility and robust of the proposed approach.