| 基于混合像元分类的城市地表覆盖时空演变格局研究 |
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| 引用本文： | 戴晓燕,过仲阳,张利权,吴健平.基于混合像元分类的城市地表覆盖时空演变格局研究[J].地理科学,2009,29(1). |
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| 作者姓名： | 戴晓燕 过仲阳 张利权 吴健平 |
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| 作者单位： | 1. 华东师范大学河口海岸学国家重点实验室,上海,200062
2. 华东师范大学地理信息科学教育部重点实验室,上海,200062 |
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| 基金项目： | 国家科技支撑计划，国家重点基础研究发展规划(973计划)，华东师范大学研究生重点课程建设项目 |
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| 摘 要： | 基于可能性理论和中心点聚类方法的原理,提出可能性C中心点(PCRMDD)聚类方法.运用该法对上海市中心城区Landsat ETM+遥感影像进行混合像元分类,并自动获取地物端元盖度分布图及影像端元光谱,解混精度的检验结果表明该方法能在噪声环境下获得精度较高的分类结果和端元光谱信息.根据各时期研究区域的地表覆盖分类结果,应用GIS空间分析功能,进一步探讨在城市化过程中上海中心城区土地利用时空演变格局,揭示城市用地空间扩展模式.
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| 关 键 词： | 混合像元分类 可能性C中心点聚类 城市地表覆盖 时空演变 上海中心城区 |
Spatio-temporal Pattern of Urban Land Cover Evolvement Based on Mixed-pixel Classification for Remote Sensing Imagery |
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| DAI Xiao-yan,GUO Zhong-yang,ZHANG Li-quan,WU Jian-ping.Spatio-temporal Pattern of Urban Land Cover Evolvement Based on Mixed-pixel Classification for Remote Sensing Imagery[J].Scientia Geographica Sinica,2009,29(1). |
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| Authors: | DAI Xiao-yan GUO Zhong-yang ZHANG Li-quan WU Jian-ping |
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| Institution: | 1.State Key Laboratory of Estuarine and Coastal Research;East China Normal University;Shanghai 200062;2.Department of Geography;Key Laboratory of Geographic Information Science;Ministry of Education;Shanghai 200062 |
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| Abstract: | In this paper,we propose a Possibilistic C Repulsive Medoids(PCRMDD) clustering algorithm,based on possibility theory and principle of c-medoids clustering method.The PCRMDD algorithm is applied to mixed-pixel classification on Landsat ETM+ images of Shanghai central city,and endmember fraction images and spectral reflectance of endmembers on images are automatically acquired.Accuracy analysis of pixels unmixing demonstrates that PCRMDD represents a robust and efficient tool for mixed-pixel classification o... |
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| Keywords: | mixed-pixel classification possibilistic c repulsive medoids clustering urban land cover spatio-temporal evolvement Shanghai central city |
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