[转载]Data Hiding in Curves with Application to Fingerprinting Maps

信息来源：http://www.enee.umd.edu/~minwu/

This paper presents a new data hiding method for curves. The proposed algorithm parameterizes a curve using the B-spline model, and adds a spread spectrum sequence to the coordinates of the B-spline control points. In order to achieve robust fingerprint detection, an iterative alignmentminimization algorithm is proposed to perform curve registration and to deal with the non-uniqueness of B-spline control points. Through experiments, we demonstrate the robustness of the proposed data hiding algorithm against various attacks, such as collusion, cropping, geometric transformations, vector/rasterraster/ vector conversions, printing-and-scanning, and some of their combinations. We also show the feasibility of our method for fingerprinting topographic maps as well as writings and drawings.