基于小波分解与分形内插相结合的地形数据压缩方法

地形匹配制导中需要使用大量的地形数据，因此有效的地形数据压缩技术是非常重要的。传统的地形数据压缩方法主要采用线性内插的方法，但这对于地形起伏较大的山区地形失真太大，不能满足高精度导航的要求。本文基于小波分解与分形内插相结合的方法，提出了一种新的地形数据压缩方法，它具有压缩比高，保真性好，解码快的特点，特别适合山区地形数据的压缩。

A ENCODING METHOD OF TERRAIN DATA COMBINED WAVELET DECOMPOSITION WITH FRACTAL INTERPOLATION

In terrain based matching,a number of terrain data will be restored by the missile loaded computer,and the effective compressing method for terrain data is extremely important.In traditionary compressing Algorithms,the linear interpolation is often adopted,but this can result in too large lack fidelity in some regions in which there is large terrain variation.These traditionary data compressing methods do not satisfy the requirements in high precision navigation.In this paper we propose a novel algorithm combined wavelet decomposition with fractal interpolation.Our method has some good properties:(a) comprssing ratio is high,(b) fidelity is very good,(c) decoding is very fast.The method is special fit for mountain area data.