Abstract: This paper explores how to construct dynamic multi-resolution models for terrain elevation data by using multi-resolution characteristic of wavelet transform and proposes a wavelet-progressive-reconstruction algorithm to solve the problem of smooth transition between multi- resolution models. It also solves crack problem between terrain blocks of different resolution through a simple “sewing” method. Experiment result illustrates that this method can realize view-dependent continuous rapid rendering of large-scale terrain.

Key words: DEM data, multi-resolution model, wavelet transformation, continuous rendering

摘要： 利用小波变换的多分辨率特性构建了地面高程数据的动态多分辨率模型，通过小波渐近重构算法解决了多分辨率模型间的平滑过渡问题，通过缝补解决了不同分辨率地形块间的裂缝问题，实现了对大规模地形的视点相关的连续快速绘制，通过实验进行了验证。

关键词: DEM数据, 多分辨率模型, 小波变换, 连续绘制

CLC Number: 

• TP391.9