基于图像分类的自适应图像水印新算法

随着网络多媒体技术的不断发展,版权保护问题变得十分重要。数字水印是实现版权保护的一种非常有效的方法,已经成为目前学术界研究的热点。文中提出了一种新的DCT域自适应数字图像水印算法,它利用图像子块特征分类结果对水印嵌入强度进行自适应调节,从而在确保水印不可见性的同时有效地增强了水印的强度,算法还综合运用了Arnold置乱变换,进一步增强了水印的安全性。实验结果表明,该算法对一些常见的信号处理操作如JPEG压缩、加噪、滤波、剪切等有较强的鲁棒性。

A novel adaptive digital watermarking algorithm based on classification of image features

With the development of network and multimedia technology, the copyright protection becomes more and more important. Digital watermark technology, as a main method of providing copyright protection, has been a hotspot. A new adaptive watermarking algorithm in DCT domain is presented. The embedding strength varies with the features of the texture, edge and luminance in the subblock of the image. Therefore, it can ensure the invisibility and enhance the strength of the watermarking. For better security, the Arnold matrix is also used in the algorithm. Experimental results demonstrate that the proposed method is robust to many kinds of attacks such as JPEG, noise, filter, cropping, etc.