一种基于Trace变换的数字图像版权保护算法

数字水印技术被视为一种有效的数字图像版权保护技术,但当水印信息因嵌入算法的公开而被一些攻击所破坏时,或同一幅图像被嵌入多个不同水印时,都不能有效地检测出数字作品的所有者。提出了一种基于Trace变换和标识信息的数字图像版权保护算法。该算法基于Trace变换进行数字作品的特征提取,并在第三方机构进行登记注册从而获得标识信息,然后根据标识信息确认数字作品的所有权。文中给出了算法的实验结果,并与传统的几何矩不变量算法进行了比较,结果表明,该算法对旋转、缩放、剪切及其组合、仿射变换、去掉部分行等几何攻击以及滤波和JPEG压缩攻击具有更高的稳健性。

A New Approach Copyright Protection of Images Based on the Trace Transform

Watermarking scheme is a well-known method for copyright protection of images. However, we can not identify who the real owner is if multiple watermarkings are embedded in an image or the embedding algorithm of watermarking has made public because some attacks can destroy the watermarking. In this paper, a robust copyright protection scheme for digital images that combines trace transform and timestamp technique is proposed. Firstly, the features of the image are extracted using the trace transform. Then the message is registered at the fair third party in order to gain the timestamp. Finally, we can use the timestamp to prove who the real owner is. Experimental results are given and compared with the results of the method based on the geometric moment invariants. The results show that the scheme can well withstand geometrical attacks such as rotation, scaling, shearing, combined attack, affine transform, remove lines, filter and JPEG lossy compression.