地形图像制备中的分形和小波变换应用

FRACTAL AND WAVELET TRANSFORM APPLICATIONTO PREPARATION OF TERRAIN GRAPH

为了制备高分辨率的地形图，建立了地形的分形模型，然后进行插值处理。经多次插值后，平滑效应显著，地形的纹理特征逐渐丧失。文中提出一种小波变换分层处理的方法，有效地克服了单纯分形插值的平滑效应，在保持地形纹理特征的基础上，制得高分辨率的地形图。

Fractal terrain model is established for interpolation to obtain terrain graphs of high spatial resolution. But smooth effect become more obvious and the texture features of terrain will lose little by little if interpolating more times. In this paper, a kind of method of wavelet transform and in- terpolation in multifrequency bands is presented . The method can overcome the smooth effect that shows in fractal interpolation. By making use of it, the terrain graph of high spatial resolution can be obtained and the texture features of real shape still remain.