[1]孟森,葛宏立,于晓辉,等.基于移动窗口Fourier变换的高分辨率遥感影像森林分类研究[J].浙江林业科技,2018,38(05):51-60.[doi:10.3969/j.issn.1001-3776.2018.05.009]
 MENG Sen,GE Hong-li,YU Xiao-hui,et al.Classificationof Foreston High Resolution Remote Sensing Image by Moving Window’s Fourier Transform[J].Journal of Zhejiang Forestry Science and Technology,2018,38(05):51-60.[doi:10.3969/j.issn.1001-3776.2018.05.009]
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基于移动窗口Fourier变换的高分辨率遥感影像森林分类研究()
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《浙江林业科技》[ISSN:1001-3776/CN:33-1112/S]

卷:
38
期数:
2018年05期
页码:
51-60
栏目:
出版日期:
2018-10-20

文章信息/Info

Title:
Classificationof Foreston High Resolution Remote Sensing Image by Moving Window’s Fourier Transform
文章编号:
1001-3776(2018)05-0051-010
作者:
孟森葛宏立于晓辉Mulunda Christian Ilunga
浙江农林大学浙江省森林生态系统碳循环与固碳减排重点实验室,浙江杭州 311300
Author(s):
MENG SenGE Hong-liYU Xiao-huiMULUNDA ChristianIlunga
Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang A & F University, Hangzhou 311300, China
关键词:
移动窗口二维Fourier变换纹理特征Fisher判别法WorldView-1高分辨率遥感影像
Keywords:
moving window two-dimensional Fourier transform texture feature Fisher discriminant WorldView-1 high resolution remotesensing image
分类号:
S757.2
DOI:
10.3969/j.issn.1001-3776.2018.05.009
文献标志码:
A
摘要:
以2008年4月获取的浙江省杭州市临安区东部区域分辨率为0.5 m的WorldView-1全色波段影像为数据源,在移动窗口基础上进行二维Fourier变换,构建纹理特征向量,采用不同的分类方法对森林进行分类,以寻找合适的移动窗口尺寸和分类方法。移动窗口按奇数从3×3增大到43×43,共21个不同尺寸的正方形窗口,每个边长窗口产生的纹理特征均采用Fisher判别法、随机森林、支持向量机、夹角余弦和相关系数进行分类,统计分类精度。以森林分类精度为依据,5种分类方法对应的最佳窗口依次为41×41,41×41,23×23,39×39和39×39;在最佳窗口下,5种分类方法区分森林与非森林的精度均在95%以上,总分类精度大小顺序为:Fisher判别法>随机森林>支持向量机>相关系数>夹角余弦,其中Fisher判别法总精度为99.81%,Kappa系数为0.996 3。在提取森林的基础上,进一步对森林树种(组)进行分类,总精度大小顺序为:Fisher判别法>随机森林>支持向量机>相关系数>夹角余弦,其中Fisher判别法总精度为84.86%,Kappa系数为0.814 9。研究结果表明,最佳窗口下Fisher判别法的分类性能优于其他4种分类方法。
Abstract:
WorldView-1 panchromatic band data of 0.5 m spatial resolution image of east Lin’an district of Hangzhou, Zhejiang province in April 2008 was used as data source, and two-dimensional Fourier transform based on moving windows was carried out to produce a texture feature vector, and different classification methods were used to classify forests based on feature vectors to find an appropriate moving window size.A total of 21 square windows with odd side lengths from 3×3 to 43×43 were tested.Texture features generated by each side were classified by Fisher discriminant, random forest(RF), support vector machine(SVM), included angle cosine(IAC) and correlation coefficient(CC), and classification accuracy wascomputed.Based on the forest classification accuracy, the optimal windows corresponding to the five classification methods were 41×41, 41×41, 23×23, 39×39, and 39×39.Under the optimal window, five classification methods had an accuracyof 95% to distinguish forests from non-forests, and the order of the total classification accuracy was as follows: Fisher discriminant> RF > SVM > CC > IAC, the Fisher's discriminant method hada total accuracy and a Kappa coefficient of 99.81% and 0.9963.Forest tree species werefurther classified, the total accuracy was Fisher discriminant> RF > SVM > CC> IAC, Fisher discriminant method hada total accuracy and Kappa coefficient of 84.86% and 0.8149.The results showed that under the optimal window, Fisher discriminant method was the best classification method.

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备注/Memo

备注/Memo:
收稿日期:2018-01-18;修回日期:2018-05-30
基金项目:国家自然科学基金项目(41371411)
作者简介:孟森,硕士在读,从事森林资源遥感监测与信息技术研究;Email:792080043@qq.com。通信作者:葛宏立,博士,教授,从事森林数学模型技术、遥感技术在森林资源监测中的应用等研究;Email:jhghlxl@163.com。
更新日期/Last Update: 2018-10-20