一种基于HVS和DC分量的DCT域数字水印算法

Watermarking algorithm based on HVS and DC components in DCT domain

为增强数字水印的透明性和鲁棒性,提出了一种基于人类视觉系统和直流分量的DCT变换域数字水印算法。算法依据原始图像的纹理掩蔽特性确定水印信息的嵌入位置,依据照度掩蔽特性确定水印信息的嵌入强度,将二值水印图像嵌入到原始图像在DCT域的直流分量中。在仿真实验中与同等条件下的中频嵌入做比较,实验结果表明,该算法提取的水印具有良好的透明性和鲁棒性。

The paper proposes a watermarking algorithm based on the human visual system （HVS） and DC components in DCT domain, in order to improve the invisibility and robustness of the watermark. The algorithm makes a binary watermark- ing image embedded into the DC components of the original image after discrete cosine transform. The location of embedded watermark is chosen by the characteristics of image texture and the intensity by the luminance of original image. The experi- mental results show that the embedded watermarks according to this algorithm are invisible and very robust.