摘要
提出了一种基于DWT的自适应扩频盲检测数字水印算法。算法将图像的Y分量作小波分解后的中低频子带作为嵌入空间,根据HVS特性计算水印自适应强度因子,对二值水印图像进行混沌调制与Hamming编码,实现了水印的自适应嵌入与盲提取。实验结果表明,该算法对于常见的图像处理具有较强的鲁棒性。
An adaptive blind spread spectrum digital watermarking algorithm based on DWT is proposed. The algorithm selects the medium-low frequency sub-bands as embedded space from the Y component of the image decomposed by DWT. It computes the adaptive intensity factors of watermarking in term of HVS characteristics and realizes adaptive embedding and blind extraction of watermarking by chaos modulation and Hamming coding for the binary image of watermarking. The experimental results show that the algorithm has strong robustness for common image processing.
出处
《计算机时代》
2009年第8期6-8,共3页
Computer Era
关键词
DWT
扩频
水印算法
HVS
DWT
spread spectrum
watermarking algorithm
HVS
