基于人类视觉系统的自适应水印嵌入算法

Adaptive watermarking algorithm based on human visual system

为了保证水印算法的良好性能 ,在许多文献中提出自适应水印技术 .但是 ,大多数算法根据单一参数对图像块进行分类 ,无法实现最优嵌入 .为此 ,提出了一种新颖的基于DCT变换域的自适应数字水印嵌入算法 .该算法首先将原始图像块按照图像块的多个特性参数分成不同的类 ,在嵌入过程中考虑到人类视觉系统 (HVS)的特点 ,在不同类的块中嵌入不同的水印能量 ,从而使算法具有自适应能力 .仿真实验表明 ,该算法对常见的一些数字图像处理操作具有较强的鲁棒性 。

A novel adaptive digital image watermarking algorithm based on the discrete cosine transform (DCT) domain is proposed to classify the original image blocks into several classes based on oil several parameters, with the features of the human visual system (HVS) taken into account during embedding, and different watermarking energies embedded into different blocks to make the algorithm adaptive. Experimental results show that the proposed technique is robust to common digital image processing operations and the quality of the watermarked image is guaranteed.