基于冬季资源三号影像的福建省中部地区植被覆盖度提取研究

Study on the Extraction of Vegetation Coverage in the Middle Part of Fujian Province by ZY-3 Images in Winter Season

本文以2012年冬季福建省中部某个区域的资源三号卫星影像为基础数据,经过地形辐射校正后利用NDVI来反演该区域的植被覆盖度,后与该区域外业验证结果进行回归分析。结果表明,两者的相关性较大,NDVI估算值相比外业验证值相对偏大,说明NDVI像元二分法反演低植被区植被覆盖度偏高。

The ZY -3 images in the middle part of Fujian Province in the winter season of Year 2012 was selected as the basic data for the extraction of the vegetation coverage in this area by using the NDVI after the topographic radiation correction. Then, the regression analysis was conducted on the external validation results in this area. The results show that, both have close correlation, the estimated NDVI value is comparatively larger than the external validation value. It means that the inversion of low vegetation area by NDVI pixel dichotomy is higher in the vegetation coverage.