A Vector Data Watermarking Algorithm Based on Minimum Quadtree Division
Yunfei Wang, Zhao Jing, Cui Weihong, Lv Shui · Jisuanji gongcheng · 2012
Digital watermark may encounter various attacks,such as data compression,feature increasing,random point increasing and map cutting,when it is used in practice.This paper proposes a digital watermarking algorithm based on feature point layer and minimum quadtree division,which is suitable for polyline and polygon layer.Douglas-Peucker compression algorithm is used to extract vector data of feature point layer,and the watermark is embedded into the feature point layer by minimum quadtree division.Experiments show that the algorithm is fairly good in imperceptibility and more robust than MQUAD algorithm in against map cutting attack.