一类DCT域鲁棒的数字水印算法

A Class of DCT Domain Robust Digital Watermark Algorithms

首先分析DCT变换后直流系数的特点并确定嵌入位置,然后提出一类根据水印信息量化DCT直流系数嵌入水印的算法。该类算法对于音频和图像数据均具有较好的透明性和鲁棒性,能有效对抗常见音频和图像攻击。

DC coefficients were analogized after DCT transformation,and they were considered to be appropriate embedded places.Then a new algorithm according to watermark information was proposed based on DC coefficients quantization,which was transparent and robust for audio and image data.It can resist efficiently against common attacks in audio and image data.