【摘要】 矢量地图广泛应用于地理信息系统、军事测绘等领域。矢量地图数字水印为数字地图提供版权保护及防伪认证等功能,近几年其研究取得了较大的进展。为使人们对该领域研究现状有概要了解,首先论述了矢量地图水印的特性及评价准则;然后重点分析了空域、频域、零水印以及多重水印算法,并通过实验比较了几类算法的优缺点;最后提出了矢量地图数字水印的发展方向和研究目标。更多还原

【Abstract】 Vector maps are widely used in the geographic information systems(GIS),military surveying and mapping and so on.Watermarking techniques for vector maps are widely used for protecting the copyright of digital maps,preventing from illegal forgery and authentication.They have been well developed recently.Firstly the characters and appraisement criteria of watermarking for vector maps were given.Then the analysis of spatial domain,frequency domain,zero-watermark and multi watermark were discussed.The comparisons showed the advantages and disadvantages of these algorithms.Finally the development direction and possible research targets were pointed out.更多还原