一种基于相位的双倒谱数字图像水印算法

数字水印技术作为版权保护的有效手段已经成为研究的热点.结合倒谱分析法在音频水印中的成功应用,文中提出了一种倒谱域图像水印算法,将二值随机序列作为水印信号嵌入在图像的双倒谱变换系数的相位成分中,并利用相关检测器进行水印检测.实验证明,该算法具有较好的透明性,对通常的图像攻击,如噪声、中值滤波、剪切、JPEE压缩等都具有较强的鲁棒性.

A Digital Image Watermarking Algorithm in Bicepstrum Domain Based on Phase

As a powerful means for copyright protection, digital watermarking techniques have become a research hotspot. Based on the successful application of cepstrum analysis in the audio watermark, a watermarking algorithm in cepstrum domain is proposed in the paper. A binary random sequence as a watermark is embedded into the phase components of bicepstrum coefficients of an image, and a correlation function is used in the watermark detecting process. Experimental results show that this watermarking algorithm is ...