基于自适应小波变换与扩频技术的图像水印算法

数字水印技术作为数字产品版权保护的一项新技术,已受到越来越多的关注。提出了一种将水印信息与扩频序列进行扩频调制后嵌入到载体图像的自适应小波变换域中。最后,利用扩频序列的自相关函数特征检测出水印信息。实验结果表明,这种算法具有较好的隐蔽性和鲁棒性。

Image Watermarking Algorithm based on Adaptive Wavelet Transform and Spread Spectrum

As a new technique applying to protecting the copyright of digital productions,the digital watermarking technique has drawn extensive attention. In this paper,spread spectrum of the watermarking and modulate the watermarking,we insert the watermarking into the adaptive DWT domain of the cover image. By used the same pseudo-random sequence and determined its correlation with the transformed detail bands of the watermarked color image. The experiment results demonstrate that the algorithm has the better invisibility and robustness.