一种城市高大地物阴影检测方法Shadow detection method of city large objects based on WorldView-2 image
姚花琴,杨树文,刘正军,杨兴旺,张黎明
摘要(Abstract)：
针对水体、偏蓝色地物会影响阴影检测精度这一问题,该文提出了一种基于WorldView-2影像的城市高大地物阴影检测方法。首先,在统计分析阴影及典型地物光谱值的基础上,对C1C2C3色彩不变空间中的C3分量利用直方图阈值法分割阴影区域和非阴影区域,分离后的阴影区域中包含了绿色植被信息;然后,利用多波段运算提取植被信息;其次,对最初的阴影植被混合区域和植被区域做逻辑差运算,得到目标阴影区域;最后,对阴影提取结果进行小区域去除和形态学滤波等后处理。实验结果表明,该方法针对WorldView-2影像具有普适性,能够有效避免水体、偏蓝色地物的影响,能够精确、快速地检测阴影区域。
关键词(KeyWords)： 阴影检测;WorldView-2影像;C1C2C3色彩空间;城市高大地物
基金项目(Foundation): 中国博士后科学基金资助项目(2014M552558XB);; 中国测绘科学研究院科研专项(513157);; 甘肃省高等学校基本科研业务费项目(212091)
作者(Author): 姚花琴,杨树文,刘正军,杨兴旺,张黎明
DOI: 10.16251/j.cnki.1009-2307.2015.10.022
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