map MAP =Military Aid Program 〔美國〕軍事援助計(jì)劃。 n. 1.地圖;天體圖;圖。 2.〔美俚〕臉,面孔。 3.〔美俚〕(染色體上基因排列的)遺傳圖。 off the map 〔口語〕不重要的;消失的;過時(shí)的;陳腐的。 on the map 〔口語〕存在的;重要的;有名的,占顯著地位的,起主要作用的。 put oneself on the map 發(fā)生,發(fā)現(xiàn);使自己出名,出人頭地。 put sb. [sth.] on the map 使某人[某事]出名。 wipe off the map 把…消滅掉。 vt. 1. 測繪,為…繪制地圖;勘測,制訂。 2.〔美俚〕測定(染色體中基因的)位置。 map out 規(guī)劃,安排。
A method erasing noises on raster map based on extension character 基于外延特征的柵格地圖噪聲去除算法
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 目前該問題在國內(nèi)外都還處于探索階段,作者在分析了國內(nèi)外三維矢量水印的研究狀況、研究方法后,提出了將矢量數(shù)據(jù)中的部分信息轉(zhuǎn)化為柵格形式后再嵌入水印的方法,該方法使地圖柵格數(shù)據(jù)和矢量數(shù)據(jù)在嵌入水印時(shí)能夠使用統(tǒng)一模型,初步的實(shí)驗(yàn)結(jié)果表明該方法為二維地圖矢量數(shù)據(jù)的水印嵌入開辟了一種新途徑。