EXTRACTION OF BRIDGES OVER WATER IN MULTI-ASPECT HIGH-RESOLUTION INSAR DATA
EXTRACTION OF BRIDGES OVER WATER IN MULTI-ASPECT HIGH-RESOLUTION INSAR DATA
复制标题
多方面高分辨率 INSAR 数据中水上桥梁的提取
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
U. Thoennessen
中科院分区：
文献类型：
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作者：
U. Soergel;H. Gross;A. Thiele;U. Thoennessen
现代机载SAR传感器提供的空间分辨率远低于半米。在这些数据中，可以看到城市物体的许多特征，而这些特征仅仅在几年前还超出了雷达遥感的范围。城市基础设施的核心要素是桥梁。在高分辨率干涉合成孔径雷达数据中，即使是很小的桥梁也被映射到覆盖大量像素的扩展数据区域。因此，在这种质量的数据中，至少可以通过视觉解释来识别桥梁结构细节。讨论了水上桥梁在高分辨率干涉合成孔径雷达数据中的特殊表现。给出了干涉SAR图像中某些桥元素映射的几何约束。提出了一种检测这种桥梁的方法。在随后的精细分析中提取关于桥梁结构的信息。利用空间分辨率优于40 cm的正交干涉合成孔径雷达单程数据集，验证了该方法的初步结果。
Modern airborne SAR sensors provide spatial resolution in the order well below half a meter. In such data many features of urban objects are visible, which were beyond the scope of radar remote sensing only a few years ago. Core elements of urban infrastructure are bridges. In high-resolution InSAR data even small bridges are mapped to extended data regions covering large numbers of pixels. Therefore, in data of this quality the identification of bridge structure details is possible at least by visual interpretation. The special appearance of bridges over water in high-resolution InSAR data is discussed. Geometric constraints for the mapping of certain bridge elements in interferometric SAR imagery are given. An approach for detection of such bridges is proposed. Information about the bridge structure is extracted in subsequent fine analysis. First results of the approach are demonstrated using orthogonal InSAR single-pass data sets of spatial resolution better than 40cm.