一种基于遥感指数的城市建筑用地信息提取新方法

A New Method for Extracting Information of Urban Built-up Based on Image Index

提出了一种利用仿建筑用地指数提取城市建筑用地信息的新方法。首先利用近红外波段和绿波段构建仿归一化建筑指数,再将其与土壤调节植被指数和归一化水体指数相结合,进而构建仿建筑用地指数,最后利用仿建筑用地指数提取城市建筑用地信息。仿建筑用地指数影像将建筑用地信息增强,通过影像分割、去小面元以及合并邻近面元处理,可以准确提取城市建筑用地信息,实验精度可达89.5%。

This paper proposes a new method to extract the urban built-up land information through the SIBI （ similar index-based built-up index） image.First,obtain SNDBI（similar normalized difference built-up index） through red band and green band .Second,constitute SIBI through SNDBI、SAVI and MNDWI.Finally,extract the urban built-up land information based on SIBI image .The SIBI image can enhance the built-up land information .Then through image segmentation、throwing off small pixels and merging near pixels processing ,we can extract the built-up land information with an accuracy over 89.5%.