CAJ | 학술논문

提出一种矢量地图数据水印模型，利用量化索引调制（QIM）思想，基于变长量化步长，将水印信息隐藏于有效表征曲线形状的特征集合中，在保障算法鲁棒性的前提下，很好地顾及了曲线的形状变形。同时，通过数据哈希分组及水印重复嵌入的方式，将水印信息散布到整个数据集。实验结果表明，该算法在水印的不可见性方面有明显改进，并且在抵抗节点攻击、数据化简及地物删除等很具威胁性的水印攻击方面也具有令人满意的鲁棒性。
제출일충시량지도수거수인모형，이용양화색인조제（QIM）사상，기우변장양화보장，장수인신식은장우유효표정곡선형상적특정집합중，재보장산법로봉성적전제하，흔호지고급료곡선적형상변형。동시，통과수거합희분조급수인중복감입적방식，장수인신식산포도정개수거집。실험결과표명，해산법재수인적불가견성방면유명현개진，병차재저항절점공격、수거화간급지물산제등흔구위협성적수인공격방면야구유령인만의적로봉성。
This paper hides the watermark information into the curve shape characteristic set using Quantized Index Mod-ulation(QIM)based on variable quantization step.At the same time,the watermark bits scatter across the whole dataset by Hash mapping and bits repeated insertion.Results show that the curve shape distortions have been well controlled,and robustness to the threatening watermark attacks,such as vertex attack,data simplification,and feature deletion and so on, has been proved.