基于FRFT及HVS的自适应数字水印算法

Adaptive digital watermarking algorithm based on FRFT and HVS

为了提高数字水印的鲁棒性和安全性,利用人眼对彩色图像视敏度特性的分析,提出了一种基于FRFT及HVS的自适应彩色数字水印算法。利用谱度量构造纹理掩蔽因子,并将它与图像的亮度及边缘掩蔽因子结合,构造彩色图像自适应掩蔽因子,将其作为嵌入强度,通过改变载体图像的FRFT中频系数进行水印嵌入。实验结果表明,该算法具有自适应能力强、隐蔽性好、安全性高等特点。

In order to improve the robustness and security of digital watermarking, this paper proposed an adaptive color digital watermarking algorithm based on FRFT and HVS by analyzing the human visual masking properties.It used spectral measurement to structure texture masking factor of the host image, and combed it with the luminance and the edge masking factors to structure adaptive masking factor of the color host image, regarded the adaptive masking value as the embedding strength.It the color watermark was embedded by modifying the FRFT intermediate frequency coefficients of the color host image.The experimental results show that the algorithm has good adaptive ability, invisibility, security and so on.