杨成松,朱长青,陶大欣(信息工程大学测绘学院, 郑州 450052;南京师范大学虚拟地理环境教育部重点实验室, 南京 210097)
A Blind Watermarking Algorithm for Vector Geo-spatial Data Based on Coordinate Mapping
YANG Chengsong,YANG Chengsong,TAO Daxin(Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 450052;Key Laboratory of Virtual Geographic Environment of Ministry of Education, Nanjing Normal University, Nanjing 210097)
By the analysis of the properties of blind watermarking, a method for generating watermark information which transforms characters directly into binary code is proposed. Secondly, the mechanism of coordinate mapping and the principles of constructing mapping function for watermarking embedding and extracting are studied based on the location characteristic of vector geo-spatial data. Then, a blind watermarking algorithm for vector geo-spatial data is obtained using the proposed approaches of generating watermark information and coordinate mapping. The experiments conducted in this paper show that the algorithm is with good robust and can resist some usual attacks such as data compressing, adding, deleting, editing, clipping, translating and so on.