中文摘要：

在有限脊波变换(FRIT,finite ridgelet transform)域,提出了一种用于图像内容认证的半易损数字水印算法。提取图像在FRIT时产生的均值信息作为图像内容特征,并由它生成认证水印。利用Bayesian最小风险函数估计选择FRIT系数,把认证水印嵌入这些系数。实验结果表明,此算法简便高效,能很好地区分图像内容的恶意篡改和偶然修改,并能确切指出篡改的位置。

英文摘要：

We proposed a novel content-based image semi-fragile watermarking algorithm for authentication in finite ridgelet transform(FRIT)domain.The authentication watermark was generated according to the image feature which was the mean of an image extracted from FRIT.The watermark was embedded in the FRIT coefficients which were selected by adopting minimizing Bayesian risk estimate.Experimental results show the algorithm is simple and effective,it can provide very good classification of malicious tampering and in...