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摘要： 提出一种给数字地图加指纹的曲线水印算法，用于保护数字地图的版权。首先根据曲率大小在曲线上选择合适的嵌入点，然后将扩频水印（或称指纹序列）嵌入到所选定嵌入点的坐标上。为了得到视觉质量好的加水印曲线和鲁棒的水印，使用分段Bezier曲线来重构加水印曲线。该加水印曲线不仅具有较小的嵌入形变，而且对于一般的图形几何变换（如平移、旋转和缩放等）、共谋以及打印扫描攻击具有良好的鲁棒性。
