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首页> 外文会议>Conference on SAR Image Analysis, Modeling, and Techniques III, Sep 25-27, 2000, Barcelona, Spain >The filtering of layover areas in high-resolution IFSAR for the building extraction
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The filtering of layover areas in high-resolution IFSAR for the building extraction

机译：用于建筑物提取的高分辨率IFSAR中的覆盖区域过滤

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摘要

The capabilities of Interferometric SAR (IFSAR) to provide Digital Elevation Model is well known and have been highlighted with the recent Shuttle Radar Topographic Mission. Nevertheless, layovers, shadows, multiple bounces and surfaces discontinuity strongly reduce the accuracy of the extracted shapes in urban areas with high-resolution systems. Due to the number and the complexity of uncontrolled interactions at work, we choose to use simulations to study the layover produced by buildings. An interferogram simulator developped at CNES, IRIT and CS, which is called 2SIR, can achieve those. This tool has been designed in order to simulate realistic interferograms (and its pair of radar images) in such complex situations as urban areas. C. Prati et al. have shown that a slope induces a spectral shift of the ground response. Although it generates a loss of coherence, it can be used to partially separate layover and non layover areas as they done with ERS images, In high-resolution, the spectral shift is insufficient to apply such a filtering. However, this technique can be achieved in urban area with certain restrictions to extract the shape of buildings.
机译：干涉SAR（IFSAR）提供数字高程模型的功能是众所周知的，并且在最近的航天飞机雷达地形任务中得到了强调。但是，在具有高分辨率系统的城市中，上浮，阴影，多次反射和表面不连续性会大大降低提取的形状的准确性。由于工作中不受控制的交互的数量和复杂性，我们选择使用模拟来研究建筑物产生的停顿。在CNES，IRIT和CS上开发的干涉图模拟器称为2SIR，可以实现这些目标。设计该工具的目的是为了在城市等复杂情况下模拟现实的干涉图（及其成对的雷达图像）。 C.Prati等。已经表明，斜率会引起地面响应的频谱偏移。尽管它会产生相干性损失，但可以像对ERS图像一样使用它来部分分离上载和非上载区域。在高分辨率下，光谱偏移不足以应用这种滤波。但是，该技术可以在城市地区实现，但要提取建筑物的形状有一定的限制。

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