摘要
为了提高抗几何攻击性能,同时保证不可见性,提出了一种结合傅立叶-梅林变换和零水印概念的图像水印算法。该算法通过对图像进行傅立叶-梅林变换找到几何不变域,在此域中提取图像特征构并加入水印密钥构成零水印。由待检测图像以相同的方法得到伪水印,通过比较零水印和伪水印的相关性判定图像版权。该算法在判定图像版权是不需要原始图像,仅需零水印。实验结果表明,该算法有较强的抗几何攻击性能,对压缩、加噪等常见的图像处理攻击同样具有良好的鲁棒性。
In order to improve performance of resistance to the geometrical attack while keep invisible, a zero-watermark algorithm for digital image based on Fourier-Millin transforming is proposed. In this algorithm, the geometrical-invariant domain is gotten by Fourier- Millin transforming （FMT） to the image, and the zero-watermark is constructed by image feature which is extracted from this domain and encrypted by secret key. A fake watermark is constructed in the same way from the detected image, and the decision of the copyright is made by comparing the correlativity of the zero-watermark and the fake watermark. The judgment is made by zero-watermark not referring the original image. Experimental results show the algorithm is robust to compression, add-in noise as well as geometrical attacks.
出处
《计算机工程与设计》
CSCD
北大核心
2009年第10期2566-2569,共4页
Computer Engineering and Design
