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林业科学 ›› 2014, Vol. 50 ›› Issue (3): 83-91.doi: 10.11707/j.1001-7488.20140312

• 论文与研究报告 • 上一篇    下一篇

多时相双极化SAR影像林地类型分类方法

王馨爽1,2, 陈尔学1, 李增元1, 姚顽强3, 赵磊1   

  1. 1. 中国林业科学研究院资源信息研究所 北京 100091;
    2. 国家测绘地理信息局陕西基础地理信息中心 西安 710054;
    3. 西安科技大学测绘科学与技术学院 西安 710054
  • 收稿日期:2013-05-02 修回日期:2013-11-28 出版日期:2014-03-25 发布日期:2014-04-16
  • 基金资助:

    863计划课题“高分辨率SAR遥感综合实验与应用示范”(2011AA120405);“面向对象SAR影像地物高可信解译技术”(2011AA120404)。

Multi-Temporal and Dual-Polarization SAR for Forest Land Type Classification

Wang Xinshuang1,2, Chen Erxue1, Li Zengyuan1, Yao Wanqiang3, Zhao Lei1   

  1. 1. Research Institute of Forest Resources Information Techniques, CAF Beijing 100091;
    2. Shaanxi Geomatics Center, National Administration of Surveying, Mapping and Geo-Information Xi'an 710054;
    3. Department of Geomatics, Xi'an University of Science and Technology Xi'an 710054
  • Received:2013-05-02 Revised:2013-11-28 Online:2014-03-25 Published:2014-04-16
  • Contact: 陈尔学

摘要:

森林在全球碳循环及大自然空气调节中发挥着重要作用,对森林分布的监测与制图意义重大。以黑龙江省逊克县两景星载ALOS PALSAR多时相数据覆盖区为研究区,利用不同时相极化SAR、干涉SAR对植被结构变化特征的敏感性,结合后向散射系数与干涉相干性的时变特征进行林地类型分类研究,发展基于多时相、多极化、干涉SAR的SVM林地类型分类识别方法。结果表明:多时相的平均干涉相干性对有林地、疏林地及灌木林地的识别十分有效;综合运用所选取的多时相干涉、极化比等有效维度信息能很好地突出地物的边缘与结构,更细致地区分不同林地类型。

关键词: 多时相, 极化, InSAR, 林地类型, 分类

Abstract:

Forest plays an important role on global carbon cycle and nature disturbance, so it is of great significance to monitor and map forest resources. Xunke County of Heilongjiang Province was selected as the test site and the coverage of two scenes of ALOS PALSAR images were applied. The sensitivity of multi-temporal PolSAR, InSAR with forest structure variation and time varying characteristics of backscattering coefficients and interferometric coherences were applied for forest land type classification. We developed a forest land type classification method based on SVM using multi-temporal, dual-polarization and interferometric SAR (InSAR) data. The result showed that the average InSAR coherence of multi-temporal could effectively identify forest land, sparse forest land and shrub land. The multi-temporal InSAR coherence, polarization ratios and other effective dimension information selected could effectively highlight the features and structures of objects and classify forest land types in detail.

Key words: multi-temporal, polarization, InSAR, forest land type, classification

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