WATERMARKING CURVES FOR FINGERPRINTING DIGITAL MAPS

Abstract

We propose an efficient watermarking technique that may be applied to curves, and is thus suitable for fingerprinting digital maps We make use of an embedding domain based on the curvature at sampled points, and alter the coordinates of selected sample points to achieve watermark embedding The watermarked curve is reconstructed using Bezier curve segments The use of a Bezier model not only ensures a high embedding capacity and a good detection performance but also minimises the distortion of the embedding process