| 基于GCP库的星载SAR图像自动精校正 |
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| 引用本文： | 许金萍,彭仲宇.基于GCP库的星载SAR图像自动精校正[J].测绘科学,2009,34(5). |
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| 作者姓名： | 许金萍 彭仲宇 |
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| 作者单位： | 1. 北京市遥感信息研究所,北京,100192
2. 北京市国土资源局海淀分局,北京,100037 |
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| 摘 要： | 近年来,合成孔径雷达(SAR)技术已取得巨大进步,人们也越来越重视其潜在的应用前景。但是,雷达侧视成像性质和地形起伏的影响导致SAR图像的几何畸变非常复杂,大大影响了SAR图像的应用。几何精校正是SAR图像广泛应用的前提,但是校正过程中需要大量地面控制点(GCPs),以往的人工选点方法费时费力。本文提出了一种基于控制点自动匹配的控制点选点方法,用以提高点位精度和工作效率。该方法包括纠正区域GCP库的建立和GCP图像片的自动匹配。试验结果表明,该方法具有较好的应用价值。
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| 关 键 词： | 合成孔径雷达(SAR)图像 几何精校正 自动匹配 控制点库 |
Automatic precise rectification for space-borne SAR image based on ground control point database |
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| XU Jin-ping,PENG Zhong-yu.Automatic precise rectification for space-borne SAR image based on ground control point database[J].Science of Surveying and Mapping,2009,34(5). |
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| Authors: | XU Jin-ping PENG Zhong-yu |
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| Abstract: | In recent years,great progress in synthetic aperture radar(SAR) technique has been made,and people have paid great attention to its potentia1 application.However,the very complicated geometric distortion of SAR image due to its side-looking imaging characteristic and the topographic relief effect seriously restricts its wide application.Precise geometric rectification is a precondition for the application of SAR image and a large quantity of ground control points(GCPs) are acquired before rectification.And the man-made GCP selection is very troublesome and time-consumed.In this paper,a new method to select GCP based on GCP automatic match technique is proposed to improve the accuracy of GCP position and the work efficiency.This method includes the establishment of the GCP database of rectified area and automatic match of GCP image.It is shown from the results that the method is of good application va1ue. |
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| Keywords: | synthetic aperture radar(SAR) image precise geometric rectification automatic match ground control point(GCP) database |
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