Blind and Robust Watermarking for Street-Network Vector Maps

摘要

This investigation develops a novel and blind watermarking approach suitable for street-network vector maps that records the information about roads by points and line segments. The proposed method simplifies the map using the Douglas Peucker algorithm to obtain the feature points and then subdivides the map into mesh segments. After map segmentation, the watermark is embedded in each segment. The proposed approach is superior to other vector map watermarking methods, since, it resolve the synchronization problem from the alternation of vertex coordinates. Moreover, the detection step does not require the original map in either the segmentation step or the watermarking step. Simulation results indicate that the proposed approach can withstand a variety of common attacks, including similarity transformation, map shifting, cropping, simplification and noise addition.