raster map meaning in Chinese

栅格地图

A method erasing noises on raster map based on extension character
基于外延特征的栅格地图噪声去除算法
The algorithm takes advantage of the merits of the watermarks both in low frequency and high frequency and can embed more information with less distortion . experimental results show the algorithm is robust to many common image operations . as for the vector map data , an uniform model of embeding watermark for vector maps and raster maps is proposed after current trend of research and watermarking methods of 3 - d vector images are summarized , primary study results show the model is effective and promising to further research
目前该问题在国内外都还处于探索阶段，作者在分析了国内外三维矢量水印的研究状况、研究方法后，提出了将矢量数据中的部分信息转化为栅格形式后再嵌入水印的方法，该方法使地图栅格数据和矢量数据在嵌入水印时能够使用统一模型，初步的实验结果表明该方法为二维地图矢量数据的水印嵌入开辟了一种新途径。