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一种面向高空间分辨率遥感影像的路口自动定位新方法

DOI: 10.6046/gtzyyg.2012.01.03, PP. 13-16

Keywords: 路口,路口自动定位,高空间分辨率,QuickBird影像,Hough变换

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Abstract:

在系统归纳和分析现有的路口遥感信息提取方法的基础上,提出一种面向高空间分辨率遥感影像的路口自动定位新方法。该方法首先通过低梯度运算获取同质区域;然后设定阈值去除同质区内的水体、阴影以及小面元干扰物;再利用Hough变换检测二值图像中的直线,并根据直线参数出现的频率排序,保留参数出现频率较高且相互间夹角较大的直线;最后用该组直线交点的平均值定位路口。以福州市城区局部QuickBird全色影像为数据源定位四岔路口与三岔路口的实证研究表明,在同物异谱与异物同谱现象严重情况下,本文算法所定位的路口仍然准确有效。

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