矢量图形脆弱水印研究与实现*

分析了矢量图形内容完整性认证的常用方法及矢量图形数字水印研究现状。针对线状实体组成的矢量图形，提出将矢量图形中线状实体分成不同的组，以组为计算单位将水印信息嵌入在矢量图形数据中，不仅能验证矢量图形的完整性，还能将窜改的定位能力精确到组，嵌入了水印信息的矢量图形仍有使用价值；在对数据精度要求极高的情况下，可以通过数据完整性验证提取出原始矢量图形数据，更好地满足一些特殊应用的需求。

Research and implementation of fragile watermark for vector graphics

This paper described the methods of integrity authentication for vector graphics fistly,and then introduced digital watermarking for vector graphics.For vector graphics composed by linear entities,it proposed a fragile watermark algorithm,which was based on that the linear entities of vector graphics were divided into different groups,and watermark information was embedded in these groups.The extraction procedure not only verified the integrity of the watermarked vector graphics,but also located modificatio...