Curve Watermarking Technique for Fingerprinting Digital Maps

Curves are one of the major components of digital maps. In order to fingerprint digital maps, this paper addresses an efficient watermarking technique for curves. We choose the embedding domain based on the curvature of sample points and alter the coordinates of selected sample points for watermark embedding. The watermarked curve is reconstructed using Bezier curve segments. The use of Bezier model ensures not only large embedding capacity and high detection response but also small embedding distortion.