摘要
提出了一种在遥感影像上自动提取土壤线的方法,并用NDVI作比较,验证了基于自动提取的土壤线计算的PVI和实测地上生物量之间的相关性及其削弱土壤背景的能力.结果表明基于自动提取的土壤线计算的PVI比NDVI对于地表草地生物量而言具有更好的相关性.研究结果使基于土壤线的植被指数的计算更方便,对提高遥感植被指数的计算精度具有一定的意义.
An improved automatic method for calculating soil line was used, based on remote sensing images. The relationship between sampled grass production and PVI depending on the automatic soil line was analyzed and its ability to weak the influence of soil was verified. The result shows that PVI is more highly related with sampled grass production and PVI has a stronger ability to reduce the influence of soil than NDVI. This research provides a simple method for calculating the vegetation index depending on soil line and offers a theoretical and practical basis for the study of vegetation index, thus being of help in reducing the negative effects on soil.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第5期102-106,共5页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(30970491
30700100
30970478)
国家博士点基金项目(20070740031)
甘肃省科技支撑项目(0708NKCA121)
国家高技术研究发展计划(863计划)项目(2007AA10Z232)
关键词
归一化植被指数
垂直植被指数
土壤线
normalized difference vegetation index
perpendicular vegetation index
soil line
作者简介
徐丹丹（1987-），女，江苏海门人，硕士研究生，e-mail：xudd0621@163．com，研究方向为草业科学；
李文龙（1978-），男，甘肃兰州人，副教授，博士，e-mail：wllee@lzu．edu．cn，研究方向为草业信息学，通信联系人．
