CAJ | 학술논문

提出了一种基于图像局部特征与图像几何正则性的鲁棒数字水印算法.采取的主要方法有:1)利用图像中的局部最稳定特征点生成具有几何不变性的局部特征区域;2)在局部特征分块中快速寻找最佳几何流方向,近似最佳逼近效果;3)设计了一种正交向量盲提取水印.实验结果表明该算法能获得很高的图像质量,且具有较强的抗攻击能力.
제출료일충기우도상국부특정여도상궤하정칙성적로봉수자수인산법.채취적주요방법유:1)이용도상중적국부최은정특정점생성구유궤하불변성적국부특정구역;2)재국부특정분괴중쾌속심조최가궤하류방향,근사최가핍근효과;3)설계료일충정교향량맹제취수인.실험결과표명해산법능획득흔고적도상질량,차구유교강적항공격능력.
In order to resist geometric attacks,a novel digital watermarking algorithm using local feature and intrinsic geometric regularity of images is presented.The main methods include:1) Invariant local feature regions are generated using locally most stable feature points of images;2) An approach is proposed to rapidly find the best image regular geometric flow in these local feature regions;and 3) An orthogonal vector is designed to extract the watermark blindly.Experimental results show that this algorithm achieves high image quality,and it has a good robust ability to resist attacks efficiently.