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首頁> 外文期刊>Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of >A Method for Surface Water Body Detection and DEM Generation With Multigeometry TanDEM-X Data
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A Method for Surface Water Body Detection and DEM Generation With Multigeometry TanDEM-X Data

機(jī)譯：利用多幾何TanDEM-X數(shù)據(jù)進(jìn)行地表水體檢測和DEM生成的方法

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This paper presents a novel method for surface water body detection and digital elevation model (DEM) generation simultaneously using multigeometry TanDEM-X pairs. The amplitude, coherence, and slope maps of the multigeometry data are used to detect water bodies. An iterative strategy by considering the perpendicular baseline and phase error is used to generate the fused DEM. The proposed method can overcome the disadvantages of the empirical threshold-based methods and the geometric distortion in the single-geometry synthetic aperture radar (SAR) water body detection. It can also improve the quality and accuracy of the fused DEM, especially in water areas and areas with geometric distortion. Five ascending and four descending TerraSAR-X/TanDEM-X pairs covering Zhuhai, China, were selected to validate the proposed method. Visual interpretation and quantitative analyses were applied to evaluate the accuracy of the detected water bodies and the fused DEM. The results show that: 1) more complete water body information is obtained compared with the single-geometry empirical threshold-based method; 2) the fused DEM refined by the detected water bodies displays good performance in separating water bodies from linear objects, e.g., bridges, and calculating the elevations of water areas; 3) the proposed method yields a high reliability and accuracy in surface water body detection, with a correctness of 90.2% and an overall accuracy of 92.0%; and 4) the accuracy of the fused DEM is about 3.4 m in a mountainous area and 10.2 m in an urban area with a high density of tall buildings.
機(jī)譯：本文提出了一種使用多幾何TanDEM-X對同時(shí)進(jìn)行地表水體檢測和數(shù)字高程模型（DEM）生成的新方法。多幾何數(shù)據(jù)的振幅圖，相干圖和斜率圖用于檢測水體。通過考慮垂直基線和相位誤差的迭代策略來生成融合DEM。所提出的方法可以克服基于經(jīng)驗(yàn)閾值的方法以及單幾何合成孔徑雷達(dá)（SAR）水體檢測中幾何失真的缺點(diǎn)。它還可以提高熔融DEM的質(zhì)量和準(zhǔn)確性，尤其是在水域和幾何變形的區(qū)域。選擇覆蓋中國珠海的5對上升和4對下降的TerraSAR-X / TanDEM-X對來驗(yàn)證該方法。視覺解釋和定量分析應(yīng)用于評估檢測到的水體和熔融DEM的準(zhǔn)確性。結(jié)果表明：1）與基于單幾何經(jīng)驗(yàn)閾值的方法相比，可以獲得更完整的水體信息； 2）由檢測到的水體精制的融合DEM在將水體與線性物體（例如橋梁）分離以及計(jì)算水域高程方面表現(xiàn)出良好的性能； 3）提出的方法在地表水體檢測中具有很高的可靠性和準(zhǔn)確性，其準(zhǔn)確度為90.2％，總體準(zhǔn)確度為92.0％； 4）在高密度高層建筑的山區(qū)，DEM的精度約為3.4 m，在市區(qū)約為10.2 m。

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