| 基于方向ROEWA算子的高分辨率SAR图像道路提取 |
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| 引用本文： | 吴禹昊,陈天泽,粟毅.基于方向ROEWA算子的高分辨率SAR图像道路提取[J].计算机工程与科学,2010,32(8):71-74. |
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| 作者姓名： | 吴禹昊 陈天泽 粟毅 |
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| 作者单位： | 国防科学技术大学电子科学与工程学院,湖南,长沙,410073 |
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| 摘 要： | 指数加权均值比率ROEWA算子是SAR图像阶跃边缘提取中较为常用的算法,但该方法只能提取边缘强度,不能得到边缘方向。本文在ROEWA算子的基础上,利用添加方向模板的方法,提出了获取边缘方向的ROEWA改进算法。并根据得到的边缘方向,分别提出了一种边缘筛选算法和快速的Hough变换算法,从而提取出图像中的直线信息。实验表明,本文方法准确、高效,且对SAR图像中的相干斑噪声具有很好的抑制作用。
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| 关 键 词： | SAR图像 ROEWA算子 边缘方向 Hough变换 道路提取 |
| 收稿时间： | 2009-01-12 |
| 修稿时间： | 2009-04-09 |
Road Extraction from High Resolution SAR Images Based on the Directional ROEWA Detector |
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| WU Yu-hao,CHEN Tian-ze,SU Yi.Road Extraction from High Resolution SAR Images Based on the Directional ROEWA Detector[J].Computer Engineering & Science,2010,32(8):71-74. |
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| Authors: | WU Yu-hao CHEN Tian-ze SU Yi |
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| Affiliation: | (School of Electronics Science and Engineering,National University of Defense Technology,Changsha 410073,China) |
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| Abstract: | The ROEWA (Ratio Of Exponentially Weighted Averages) edge detector has been widely used in the extraction of the step edges in SAR images. The detector can only get the edge intensity, but it can not get the edge direction. A modified ROEWA edge detector is proposed to gain the edge direction with directional templates. After edge detection, a new edge selecting algorithm and a fast Hough transformation are proposed based on the edge direction, which can gain the straight lines in the images. The simulated result experiments the accuracy and the efficiency of the algorithm proposed, and the speckle noise is suppressed. |
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| Keywords: | SAR image ROEWA detector edge direction Hough transformation road extraction |
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