期刊论文

Research on spectral sensitive bands of rapeseed in different phonological periods based on ROC map

中文

湖南农业大学学报(自然科学版)

1007-1032

2017

43

6

684-688

10.13331/j.cnki.jhau.2017.06.020

31501227:国家自然科学基金 11571103:国家自然科学基金 2014FJ1006:湖南省科技重大专项 2015JC3098:湖南省科学技术厅重点研发计划项目 15A083:湖南省教育厅重点项目 2016ZK32:湖南农业大学大学生科技创新项目

本校为第一机构

测定了直播和移栽油菜的苗期、抽薹期、花期、盛花期和角果期的冠层光谱,构建了比值光谱植被指数(RSI)和归一化光谱植被指数(NDSI)。为了获得区分直播和移栽的最佳RSI和NDSI,利用降采样法和精细采样法相结合的受试者工作特征(ROC)图寻找油菜生长期光谱的敏感波长,直播和移栽油菜各时期RSI和NDSI的最敏感波长分别为:苗期(458 nm,511 nm)和(433 nm,517 nm);抽薹期(997 nm,501 nm)和(990 nm,510 nm);花期(1 235 nm,1 180 nm)和(1 235 nm,1 180 nm);盛花期(478 nm,396 nm)和(484 nm,416 nm);角果期(1 073 nm, 1 037 nm)和(1 092 nm,1 024 nm)。用敏感波长下的2种植被指数为特征,以最近邻法为分类器的...

In this paper, rapeseed canopy spectra was collected, in periods of seeding, bolting, flowering, lush flowering and pod, to generate ratio spectral index (RSI) and normalized difference spectral index (NDSI). In order to acquire the best RSI and NDSI, the most sensitive bands were obtained by employing receiver operating characteristic (ROC) map with the combination of down sampling and fine sampling. For the direct plant and transplant the best values are as followed: the seeding period: RSI(458 nm, 511 nm) and NDSI(433 nm, 517 nm), the bolting period: RSI(997 nm, 501 nm) and NDSI(990 nm, 510...