计算机科学 ›› 2014, Vol. 41 ›› Issue (12): 118-124.doi: 10.11896/j.issn.1002-137X.2014.12.025
乐德广,姜楠,郑力新,李晓潮
LE De-guang,JIANG Nan,ZHENG Li-xin and LI Xiao-chao
摘要： 针对数字图像出现的区域克隆安全问题, 提出基于局部不变特征及离群检测技术的数字图像区域克隆认证算法。该算法首先通过高斯差分算子检测图像尺度空间中具有局部不变特征的特征点；接着,基于欧氏距离相似性度量和最近邻距离比率匹配策略,通过局部不变特征匹配检测图像区域克隆；最后,通过离群检测验证匹配结果。实验表明,该算法不但对图像区域克隆具有很好的检测效果,而且能有效抵御各种后处理篡改攻击。此外,与现有算法相比,本算法具有较高的计算效率。
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