文档介绍：第 40 卷
第 2 期测
绘
学
报 Vol. 40, No. 2
20
11 年 4 月 Acta Geoda etica et Ca rtographica Sinica Apr. , 2011
文章编号: 1001
1595( 2011) 02
0256
06
基于常函数的抗几何变换的矢量地理数据水印算法
杨成松1 , 朱长青2
1. 信息工程大学测绘学院, 河南郑州 450052; 2. 南京师范大学虚拟地理环境教育部重点实验室, 江苏南京 210097
Robust Watermarking Algorithm for Geometrical Transform for Vector Geo
spatial Data
Based on Invariant Function
YA N G Cheng song1 , Z HU Chang qing 2
1. Institute of Surveying a nd Mapping, Informa tion Engineeri ng Universi ty, Zhengzhou 450052, Chi na; 2. Key La bora tory of Virtual
Geographi c Environment of Mini stry of Education, Na nj ing Norma l University, Na nji ng 210097, China
AbstractAs the inva ria nt function for some of the tra nsform has non
dena tured, a robust on the watermarking
algorithm geometric transforma tions for geo
spatial vector data is proposed. Firstly, the conception and cha rac
teristic of invariant function were presented. Secondly, a n invaria nt robust function to rota tion, scaling and
transla tion wa s proposed a nd proved, then ba sed on the obtained inva ria nt function, by embedding wa terma rk into
the geometric invariant, a watermarking algorithm for geo
spatial vector da ta wa s proposed. Finally, experiments
on the proposed waterma rking a lgorithm were performed. The experiments show that the proposed a lgorithm is
robust a nd could resist atta cks such pressing, adding, deleting,