多特征辅助下的GF-6 WFV影像准噶尔山楂识别研究  

Crataegus songarica recognition using Gaofen-6 wide-field-view data assisted by multiple features

作　　者：陈春秀 陈蜀江[1,2] 徐世薇 陈孟禹 贾翔 黄铁成[1] 李春蕾[5] CHEN Chunxiu;CHEN Shujiang;XU Shiwei;CHEN Mengyu;JIA Xiang;HUANG Tiecheng;LI Chunlei(College of Geography and Tourism,Xinjiang Normal University,Urumqi 830054,Xinjiang,China;Urumqi Institute of Spatial Remote Sensing Applications,Urumqi 830054,Xinjiang,China;Emin County Bureau of Natural Resources,Tarbagatay 834600,Xinjiang,China;Forestry Institute,Beijing Forestry University,Beijing 100083,China;Institute of Forest Ecological Environment and Protection,Chinese Academy of Forestry Sciences,Beijing 100091,China)

机构地区：[1]新疆师范大学地理科学与旅游学院,新疆乌鲁木齐8300054 [2]乌鲁木齐空间遥感应用研究所,新疆乌鲁木齐830054 [3]额敏县自然资源局,新疆塔城834600 [4]北京林业大学林学院,北京100083 [5]中国林业科学研究院森林生态环境与保护研究所,北京100091

出　　处：《干旱区研究》2021年第2期553-561,共9页Arid Zone Research

基　　金：国家重点研发计划《天山北坡退化野果林生态保育与健康调控技术》项目(2016YFC0501500)资助。

摘　　要：针对高分六号WFV数据应用研究基础相对薄弱,准噶尔山楂遥感识别在算法、数据源等方面存在不足的问题,联合GF-6 WFV和ZY-3号影像数据提取多种分类特征,基于面向对象分割、特征选择、特征重要性评价与组合以及多分类器联合等方法对准噶尔山楂的遥感识别开展研究,提出优选特征辅助下的面向对象多分类器组合的准噶尔山楂识别算法。研究表明:(1)GF-6 WFV数据能够很好的对准噶尔山楂进行识别,特别是新增的红边波段对树种识别具有重要作用;(2)面向对象分割、特征选择和多特征组合都对准噶尔山楂识别的精度具有正向提升作用;(3)多分类器组合算法能够弥补单一分类器表征力差异造成的误差,显著提高识别精度和算法的稳定性。Our ability to extract spatial distribution information for Crataegus songarica by remote sensing is relatively weak,and the performance of a single algorithm in information extraction is different.To address this problem,we explored the application potential of domestic Gaofen-6(GF-6)wide-field-view(WFV)data in tree species recognition in arid and semi-arid areas.Using GF-6 WFV and Ziyuan-3(ZY-3)data,we constructed a combined classifier recognition algorithm with multi-feature assistance.First,we combined a linear spectral clustering algorithm for ZY-3 data super-pixel segmentation with the sample set to determine the optimal scale,avoid the salt-and-pepper phenomenon and improve the recognition accuracy.Second,we extracted spectral features,texture features,and vegetation index features based on multi-source data,using the recursive feature elimination method to select classification features.Feature importance was evaluated based on the mean decrease impurity to construct the optimal classification feature set,improve the separability between feature classes,and reduce the redundancy between features.Finally,we constructed a weight-adaptive voting combination classifier based on the support vector machine algorithm and random forest algorithm.Combined with a variety of classification schemes,the spatial distribution of Crataegus songarica was extracted and verified to evaluate the influence of object-oriented algorithm,multi-classifier combination algorithm,and feature selection on the classification accuracy.The results showed that GF-6 WFV data can be used to identify Crataegus songarica and have great application potential in forestry production.Compared with GF-1 WFV,two new red-edge bands of GF-6 WFV play an important role in the identification of Crataegus songarica.Compared with traditional pixel-based methods,the object-based recognition of Crataegus songarica effectively mitigated the pepper salt phenomenon and significantly improved the recognition accuracy,algorithm efficiency,and robustness.Moreove

关 键 词：高分六号 特征选择 面向对象 多分类器组合 准噶尔山楂 

分 类 号：S661.5[农业科学—果树学] TP79[农业科学—园艺学] TP181[自动化与计算机技术—检测技术与自动化装置]