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林业资源管理 ›› 2017›› Issue (4): 82-88.doi: 10.13466/j.cnki.lyzygl.2017.04.013

• 科学研究 • 上一篇    下一篇

基于无人机可见光影像的亚高山针叶林树冠参数信息自动提取

王枚梅1,2(), 林家元1(), 林沂3, 李翊4   

  1. 1.中国科学院 水利部成都山地灾害与环境研究所,成都 610041
    2.中国科学院大学,北京 100049
    3.北京大学 遥感与GIS研究所,北京 100871
    4.四川省都江堰管理局,成都 611830
  • 收稿日期:2017-04-25 修回日期:2017-05-25 出版日期:2017-08-28 发布日期:2020-09-24
  • 通讯作者: 林家元
  • 作者简介:王枚梅(1993-),女,四川巴中人,在读硕士,研究方向为山地灾害与环境遥感。Email:wangmeimei1206@163.com
  • 基金资助:
    国家自然科学基金面上项目(41471281);生态安全与保护四川省重点实验室开放基金课题(ESP1601);四川省重点研发项目(2017SZ0085);高原大气与环境四川省重点实验室开放基金课题(PAEKL-2016-C2)

Subalpine Coniferous Forest Crown Information Automatic Extraction Based on Optical UAV Remote Sensing Imagery

WANG Meimei1,2(), LIN Jiayuan1(), LIN Yi3, LI Yi4   

  1. 1. Institute of Mountain Hazards and Environment,CAS,Chengdu 610041,China
    2. University of Chinese Academy of Sciences,Beijing 100049,China
    3. Institute of Remote Sensing and GIS,Peking University,Beijing 100871,China
    4. Dujiangyan Administration of Sichuan Province,Chengdu 611830,China
  • Received:2017-04-25 Revised:2017-05-25 Online:2017-08-28 Published:2020-09-24
  • Contact: LIN Jiayuan

摘要:

树冠是树木获取光能并进行能量转换的主要场所,在监测树木长势,估算树木生物量等方面具有重要作用。及时准确获取树冠参数信息有助于研究树木生长状况和森林变化动态,有效改善森林经营管理。无人机遥感具有快速机动、云下飞行、影像分辨率高、成本低等优势,非常适合于亚高山针叶林树冠遥感影像的获取。论文以贡嘎山雅家埂局部范围亚高山针叶林为研究对象,采用固定翼无人机获取可见光遥感影像,基于面向对象方法自动提取了亚高山针叶林的东西冠幅、南北冠幅、单元面积树木数和郁闭度等参数。以目视解译结果作为参考数据进行验证,东西冠幅和南北冠幅的提取精度分别是0.765 1和0.855 6,单元面积树木数和郁闭度的提取精度分别是0.99和0.92。研究结果表明,基于无人机遥感影像的树冠参数信息自动提取方法高效可靠,能够满足亚高山针叶林生长状况快速评价与动态遥感监测的需求。

关键词: 无人机遥感, 亚高山针叶林, 树冠参数, 面向对象

Abstract:

As the main part for trees to obtain light energy and convert energy,crown plays an important role in monitoring tree growth,estimating tree biomass and so on.Timely and accurate acquisition of crown parameter information can help to study tree growth status and forest dynamic changes,and improve forest management effectively.With superiorities of low cost,safety,flexible take-off and landing,ability to fly under cloud,hyper spatial image resolution,UAV (Unmanned Aerial Vehicle) remote sensing is very suitable for obtaining remote sensing imagery of crown of subalpine coniferous forest.We extracted tree crowns and crown parameters such as the transmeridional crown,north-south crown,number of trees per unit area,and density of subalpine coniferous forest in one region of Sichuan Gongga Mountains from fixed-wing UAV images based on object-based image analysis method.The visual interpretation result was taken as reference data to verify the precision.The results showed that extraction accuracies of transmeridional crown,north-south crown,number of trees per unit area,density were 0.77,0.86,0.99 and 0.92 respectively.This result indicated high effectiveness and reliability of forest crown information automatic extraction based on optical UAV remote imagery,and UAV remote sensing can meet the demands of evaluating subalpine coniferous forest growth status and monitoring dynamic changes.

Key words: UAV remote sensing, subalpine coniferous forest, crown parameters, object-based

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