面向虚拟地球的遥感影像无效域去除与应用

Extraction and Expression of Remote Sensing Images Invalid Region Oriented to Virtual Earth

在分析遥感影像无效域的典型特征的基础之上,提出了一种基于无效域连通性的两阶段扫描算法,以提取遥感影像无效域,设计了行程编码和像素位图两种结构,以表达遥感影像无效域。实验和分析表明,上述方法在大多数情况下能正确地提取和表达遥感影像无效域,并能有效地辅助多分辨率金字塔的构建。

By analyzing the typical characteristics of remotesensing images invalid region,this paper proposes a two-phasescanning method to extract remote sensing images invalid re-gion,which explores the facts that invalid region is always con-nected. In addition,we designs two different structures,i.e.,run-length encoding and pixel bitmap,to express the extracted remote sensing images invalid region. Experimental results show that our method can effectively extract and express remotesensing images invalid region in most cases,and correctly assist the building of multi-resolution pyramid.