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單幅SAR遙感影像定位的幾何分析
摘要:在數(shù)字高程模型(DEM)支持下的單幅影像迭代定位方法(IPM)是利用單幅遙感影像進(jìn)行目標(biāo)定位或修測(cè)地圖的主要方法.一直以來(lái),SAR影像IPM的'幾何意義都不甚明了.依據(jù)SAR影像距離投影的原理,對(duì)SAR影像IPM的計(jì)算過(guò)程進(jìn)行了幾何分析,提出以地面傾角和起始高程點(diǎn)入射角作為已知量,推導(dǎo)了其近似的收斂條件以及收斂速度計(jì)算公式,并分析得到地面傾角和起始高程值是影響SAR影像IPM收斂性和收斂速度的主要因素.最后,分別利用模擬數(shù)據(jù)和真實(shí)數(shù)據(jù)對(duì)幾何分析的結(jié)論進(jìn)行了實(shí)驗(yàn)驗(yàn)證.實(shí)驗(yàn)結(jié)果表明,理論分析結(jié)論正確合理,有助于深入分析SAR影像上像點(diǎn)與地面點(diǎn)的幾何關(guān)系.Abstract:The iterative positioning method (IPM) based on digital elevation model (DEM) is an important way in object positioning or map revision with single remote sensing image. The geometry principle of synthetic aperture radar (SAR)-IPM has not been clear so far. In this study, the iterative calculation process of SAR-IPM was analyzed by using geometry theory based on distant projection of SAR image. Two known variables, slope obliquity and incidence angle of initial position, were chosen to derive the approximate convergence criterion and the convergence speed function. It is found that slope obliquity and incidence angle are leading factors for the convergence and convergence speed of SAR-IPM. Experiment results with simulated data and real data have proved that the approximate convergence criterion is accurate and reasonable, and the convergence speed function is correct. The result will help to analyze the geometry relation between the SAR image point and the corresponding ground point. 作者: 邢帥 徐青 何鈺 藍(lán)朝楨 Author: XING Shuai XU Qing HE Yu LAN Chao-Zhen 作者單位: 信息工程大學(xué),測(cè)繪學(xué)院,河南,鄭州,450052 期 刊: 紅外與毫米波學(xué)報(bào) ISTICEISCIPKU Journal: JOURNAL OF INFRARED AND MILLIMETER WAVES 年,卷(期): 2009, 28(6) 分類號(hào): P237 關(guān)鍵詞: 單幅影像迭代定位方法 SAR影像 數(shù)字高程模型 Keywords: iterative positioning method with single image SAR image digital elevation model(DEM) 機(jī)標(biāo)分類號(hào): TP7 P2 機(jī)標(biāo)關(guān)鍵詞: 單幅遙感影像 SAR遙感 影像定位 幾何分析 REMOTE SENSING IMAGE incidence angle speed function synthetic aperture radar IPM digital elevation model SAR image 收斂速度 leading factors SAR影像 remote sensing 數(shù)字高程模型 地面 Experiment based 主要因素 基金項(xiàng)目: 國(guó)家自然科學(xué)基金,國(guó)家西部1:50000地形圖空白區(qū)測(cè)圖工程項(xiàng)目,上海市博士后科研計(jì)劃項(xiàng)目,北京大學(xué)為新基金,信息工程大學(xué)測(cè)繪學(xué)院課題 單幅SAR遙感影像定位的幾何分析[期刊論文] 紅外與毫米波學(xué)報(bào) --2009, 28(6)邢帥 徐青 何鈺 藍(lán)朝楨在數(shù)字高程模型(DEM)支持下的單幅影像迭代定位方法(IPM)是利用單幅遙感影像進(jìn)行目標(biāo)定位或修測(cè)地圖的主要方法.一直以來(lái),SAR影像IPM的幾何意義都不甚明了.依據(jù)SAR影像距離投影的原理,對(duì)SAR影像IPM的計(jì)算過(guò)程進(jìn)行了幾何...【單幅SAR遙感影像定位的幾何分析】相關(guān)文章:
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