基于高分辨率遥感影像的城市不透水层提取研究进展浅析

Overview on the Advance of the Research of Urban Impervious Surface Extraction Using Very High Resolution Satellite Imagery

不透水层是城市生态环境评价的主要元素和城市化的一个重要指标。随着高分辨率影像的大量获取和广泛使用,采用高分辨率遥感影像提取不透水层引起了广泛的关注。本文介绍了不透水层提取的研究情况,分析了高分辨率遥感影像提取不透水层的优势、存在的问题及研究进展,重点阐述了提取中的几个主要难点,包括不透水层光谱差异性大、光谱混淆、阴影及遮挡问题突出等,并分别针对这些难点对当前的研究进展进行了总结,最后对基于高分辨率影像的不透水层提取研究趋势进行了相应分析。

Impervious surface is an important indicator of urban ecological environment and urbanization.Urban impervious surface extraction using very high resolution satellite imagery has drawn widespread attention in recent years.The advantages,existing problems,and research progresses of impervious surface extraction using very high resolution images are summarized in this paper.Studies are mainly aimed at issues including large spectral variation of impervious surface,spectral confusion with other land cover surface,shadow and occlusion problems.The current research progresses including methods adopted or produced in those studies are analyzed accordingly.The research trends are also discussed.