东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2014年
11期
82-87
,共6页
线性混合像元分解%端元提取%植被覆盖度%植被指数
線性混閤像元分解%耑元提取%植被覆蓋度%植被指數
선성혼합상원분해%단원제취%식피복개도%식피지수
Linear spectral unmixing%End-member extraction%Vegetation coverage%Vegetation index
以内蒙古荒漠地区胡杨林为研究对象,应用混合像元分解方法从TM多光谱数据中提取了胡杨林植被覆盖度,并以高分辨率Quickbird影像分割结果作为真值进行精度评价,与传统的基于植被指数提取植被覆盖度的方法进行了对比。结果表明:基于几何顶点端元选取的混合像元分解方法可以有效提取胡杨植被覆盖度( R2=0.893,RMSE=0.12),优于植被指数回归方法提取精度(R2=0.574)。研究结果有助于开展荒漠地区较大范围的胡杨林动态监测和保护。
以內矇古荒漠地區鬍楊林為研究對象,應用混閤像元分解方法從TM多光譜數據中提取瞭鬍楊林植被覆蓋度,併以高分辨率Quickbird影像分割結果作為真值進行精度評價,與傳統的基于植被指數提取植被覆蓋度的方法進行瞭對比。結果錶明:基于幾何頂點耑元選取的混閤像元分解方法可以有效提取鬍楊植被覆蓋度( R2=0.893,RMSE=0.12),優于植被指數迴歸方法提取精度(R2=0.574)。研究結果有助于開展荒漠地區較大範圍的鬍楊林動態鑑測和保護。
이내몽고황막지구호양림위연구대상,응용혼합상원분해방법종TM다광보수거중제취료호양림식피복개도,병이고분변솔Quickbird영상분할결과작위진치진행정도평개,여전통적기우식피지수제취식피복개도적방법진행료대비。결과표명:기우궤하정점단원선취적혼합상원분해방법가이유효제취호양식피복개도( R2=0.893,RMSE=0.12),우우식피지수회귀방법제취정도(R2=0.574)。연구결과유조우개전황막지구교대범위적호양림동태감측화보호。
We developed a spectral unmixing method using TM multispectral data for Populus euphratica in Inner Mongolia desert area to extract vegetation coverage.The decomposition result was evaluated by comparing with tree crown segmentation re-sults from a Quickbird image.Then, the method was compared with the traditional vegetation index based method.Spectral unmixing based on geometric-vertex-based end-member selection method can effectively extract Populus euphratica vegeta-tion coverage (R2=0.893, RMSE=0.12), which is better than using traditional vegetation index based regression method ( R2=0.574) .Our results can improve dynamic monitoring and protection at large scalefor desert poplar.