摘要
提升方法是一种新型小波变换方法,比小波理论中的多分辨分析更加有效。介绍提升方法实现的原理和构造的三个步骤,将提升方法应用于DEM数据的多尺度表达;简述结构算法并重点说明对该算法的改进,最后给出利用改进的结构算法在多尺度DEM数据中提取地形特征线的方法和实验过程。
Lifting scheme is a new wavelet transformation method, which is more effective than the multi-resolution analysis of wavelet theory. This paper presents the fundamentals and the three constructing steps of lifting scheme briefly. And it uses lifting method to process DEM data with multi-scale representation. It introduces structure algorithm briefly and emphasizes the improved structure algorithm in detail; finally it shows the experimental method and process of extracting the characteristic line of terrain from the multi-scale DEM data by using the improved structure algorithm.
出处
《测绘学报》
EI
CSCD
北大核心
2005年第2期134-137,共4页
Acta Geodaetica et Cartographica Sinica
基金
国家自然科学基金资助项目(49971068)
湖北省教育厅重点资助项目(2003A006)
