水印信息分段的矢量地理数据多级水印算法

A Multiple Watermarking Algorithm for Vector Geographic Data Based on Watermarking Information Segmentation

多级水印算法在矢量地理数据多级分发、版权保护中具有重要作用。首先,通过对矢量地理数据多级分发中数字水印技术的应用需求,建立了矢量地理数据多级水印模型。接着,通过对水印信息分段,结合分发流程,建立了多级水印信息生成方法。然后,建立一种适应分段水印信息的多级水印嵌入和检测模型。最后,对多次嵌入水印的数据可用性以及算法的鲁棒性进行了试验分析。

The multi-level watermarking algorithm plays an important role in the multistage copyright protection of vector geographic data. First, according to the demand of multistage distribution of vector geographic data, a multi- level watermarking model for vector geographic was proposed. Then by using the method of segmenting the water- mark information, combing the distribution process, the watermark information was generated through resynthesiz- ing. Based on this, a multi-level watermarking model of embedding and detecting was proposed. Finally, the avail- ability of data after repeated embedding and the robustness of the algorithm were analyzed through the experiments.