基于提升方法的DEM多尺度表达研究

Multi-scale Representation of DEM Based on Lifting Scheme

详细介绍了提升方法实现的原理和构造的 3个步骤 ,利用提升方法来处理浙江某地DEM数据 ,对其进行多尺度表达 ,并同第一代小波变换的多尺度表达的效果进行了比较。实例表明 ,提升方法有计算速度快、变换过程中数据无损失。

With the development of GIS application ceaselessly, a mass of multi-scale geo-spatial data need to be analyzed and represented. The fundamentals of lifting scheme and the three constructing steps, are presented . As an example, the lifting scheme and the binary wavelet transform are applied to compress a certain DEM . Comparing with these two methods, it is easy to conclude that the lifting scheme has more than two superiorities. The experimental results show that the lifting scheme has excellent performance in DEM data multi-scale representation.