摘要
对马铃薯关键生育期的高光谱遥感图像进行特征提取和分析,提出了一种快速区分不同马铃薯品种的方法。以两个早熟和中熟马铃薯品种为研究对象,采集其块茎形成期、块茎膨大期和淀粉积累期的冠层反射光谱曲线,对实测反射光谱曲线进行Savitzky-Golay滤波平滑和一阶微分处理,以高光谱位置参数、振幅参数、面积参数、宽度参数和反射率参数为研究指标,根据21个高光谱特征参数的贡献率大小,评价了其区分不同马铃薯品种的优劣。结果表明:(1)同一类高光谱特征参数在不同生育期区分马铃薯品种的能力不同:高光谱位置参数、宽度参数和反射率参数在块茎膨大期区分不同马铃薯品种的能力最强,淀粉积累期次之;高光谱振幅参数和面积参数在淀粉积累期的区分能力最强,块茎膨大期次之,五类高光谱特征参数在块茎形成期的区分能力均最差。(2)同一生育期5类高光谱特征参数区分马铃薯品种的能力也存在差异。在块茎形成期,五类高光谱特征参数的区分能力从强到弱依次为:反射率参数>振幅参数>面积参数>宽度参数>位置参数;在块茎膨大期和淀粉积累期,从强到弱依次为:面积参数>振幅参数>反射率参数>宽度参数>位置参数。综合能力从强到弱依次为:面积参数>振幅参数>反射率参数>宽度参数>位置参数。
In this paper,the spectral characteristics of potato key growth period are analyzed by using hyperspectral remote sensing technology,and a quick method to distinguish different potato varieties was proposed.In addition,two potato varieties with early maturity and medium maturity are taken as the research materials,and thecanopy reflectance spectrum curves of tuber formation stage,tuber expansion stage and starch accumulation stage are collected,Savitzky-Golay filtering smoothing and first order differential processing are applied to the measured reflectance spectrum curve,hyperspectral position parameters,amplitude parameters,area parameters,width parameters and reflectance parameters are used as evaluation indices,according to the contribution rate of 21 hyperspectral characteristic parameters,their ability to distinguish different potato varieties is evaluated.The results show that:(1)The ability of the same type of high spectral characteristic parameters to distinguish potato varieties at different growth stages is different.Hyperspectral position parameters,width parameters and reflectance parameters have the strongest ability to distinguish different potato varieties during tuber expansion stage,followed by starch accumulation stage;high spectral amplitude parameters and area parameters have the strongest differentiation ability in starch accumulation stage,followed by tuber expansion stage,and the 5 types of hyperspectral characteristic parameters have the worst differentiation ability in tuber formation stage.(2)In the same growth stage,there are differences between the 5 kinds of hyperspectral characteristicparameters in distinguishing potato varieties.In the tuber formation stage,the ability of distinguishing 5 kinds of hyperspectral characteristic parametersfrom strong to weak is as follows:reflectance parameter>amplitude parameter>area parameter>width parameter>position parameter;In the period of tuber expansion and starch accumulation,the order from strength to weakness is as follows:area parameter>amplitude parameter>reflectance parameter>width parameter>position parameter.The comprehensive ability from strong to weak is as follows:area parameter>amplitude parameter>reflectivity parameter>width parameter>positionparameter.
作者
段丁丁
何英彬
罗善军
王卓卓
DUAN Ding-ding;HE Ying-bin;LUO Shan-jun;WANG Zhuo-zhuo(Institute of Agriculture Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China;Academy of Management,Tianjin Polytechnic University,Tianjin 300387,China)
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2018年第10期3215-3220,共6页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金面上项目(41771562)
中国农业科学院创新工程(2016-2020
IARRP2017-727-1)资助
关键词
光谱特征
光谱参数
马铃薯品种
滤波处理
一阶微分
Spectral characteristics
Spectral parameters
Potato varieties
Filtering treatment
First order differential
作者简介
段丁丁,1994年生,中国农业科学院研究生e-mail:1191058832@qq.com;通讯联系人何英彬e-mail:heyingbin@caas.cn。
