| 基于分水岭变换的高分辨率机载城区SAR图像建筑物自动检测方法 |
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| 引用本文： | 赵凌君,匡纲要.基于分水岭变换的高分辨率机载城区SAR图像建筑物自动检测方法[J].电子与信息学报,2008,30(10):2325-2328. |
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| 作者姓名： | 赵凌君 匡纲要 |
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| 作者单位： | 国防科技大学电子科学与工程学院 长沙410073 |
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| 摘 要： | 该文提出了一种从单幅高分辨率机载SAR图像上自动检测建筑物目标轮廓的方法。该方法以应用标记的分水岭变换为基础，针对建筑物的强回波特性和形状特征，主要采用CFAR检测和方向相关分析得到标记图像，然后利用最小强制技术和标记图像修改原始图像的梯度图，最后对修改后的梯度图作分水岭变换得到建筑物目标的边界轮廓。实验结果表明了该算法的有效性。
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| 关 键 词： | SAR图像 建筑物检测 分水岭变换 标记 最小强制 |
| 收稿时间： | 2007-3-26 |
| 修稿时间： | 2007-9-24 |
A Watershed-based Automatic Building Detection in High-resolution Airborne Urban SAR Images |
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| Zhao Ling-jun,Kuang Gang-yao.A Watershed-based Automatic Building Detection in High-resolution Airborne Urban SAR Images[J].Journal of Electronics & Information Technology,2008,30(10):2325-2328. |
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| Authors: | Zhao Ling-jun Kuang Gang-yao |
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| Affiliation: | School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | The automatic detection of building boundaries in a single high-resolution urban SAR (Synthetic Aperture Radar) image based on watershed transform with markers is proposed in this paper. According to the strong radar backscatter energy and shape feature of a building in SAR images, markers are extracted mainly by a CFAR detector and direction-correlation analysis. Then the minima imposition is used to modify the gradient of the initial SAR image with the help of markers. Finally, the building boundaries are obtained by computing the watersheds of the modified gradient image. The experiment shows the feasibility of our method. |
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| Keywords: | SAR images Building detection Watershed transform Markers Minima imposition |
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