火星快车HRSC线阵影像投影轨迹法近似核线重采样

发布时间：2018-01-15 00:16

本文关键词：火星快车HRSC线阵影像投影轨迹法近似核线重采样　出处：《武汉大学学报(信息科学版)》2015年01期 　论文类型：期刊论文

【摘要】：火星快车高分辨率立体相机(high resolution stereo camera,HRSC)线阵推扫式影像具有分辨率高、全球覆盖性好等特点,对火星快车HRSC影像进行摄影测量处理可获取火星全球高分辨率地形数据,而影像匹配是自动获取地形数据的关键。利用核线几何约束可以将影像匹配搜索范围由二维降至一维。本文在构建火星快车HRSC线阵影像严格几何模型的基础上,提出了一种近似核线重采样方法。首先,利用投影轨迹法分析HRSC线阵影像核线的直线性与平行性;然后,将原始HRSC影像进行微分纠正生成水平影像,分析投影轨迹法得出的核线在水平影像上的几何关系并确定近似核线方向,再沿核线方向进行核线重排生成近似核线影像。实验结果表明,本文算法生成的近似核线影像同名点上下视差优于1个像素,且在水平影像上进行近似核线重采样减少了由外方位元素变化引起的几何畸变,更有利于影像匹配。
[Abstract]:Mars Express High Resolution Stereo camera high resolution stereo camera-scan linear push-scan images have high resolution. Because of its good global coverage, high resolution global terrain data can be obtained by photogrammetric processing of HRSC images of Mars Express. Image matching is the key to automatic acquisition of terrain data. The search range of image matching can be reduced from two to one dimension by using kernel geometric constraints. In this paper, the basis of strict geometric model of HRSC linear array image of Mars Express is constructed. On the basis. In this paper, an approximate kernel line resampling method is proposed. Firstly, the linearity and parallelism of the core lines of HRSC linear array images are analyzed by projection trajectory method. Then, the original HRSC image is differential corrected to generate the horizontal image, and the geometric relationship of the kernel line obtained by the projection trajectory method on the horizontal image is analyzed and the direction of the approximate kernel line is determined. The experimental results show that the parallax of the same name points generated by the proposed algorithm is better than that of one pixel. The approximate kernel line resampling on the horizontal image reduces the geometric distortion caused by the change of the external azimuth element, which is more favorable for image matching.
【作者单位】：信息工程大学地理空间信息学院;61363部队;地理信息工程国家重点实验室;
【基金】：国家973计划资助项目(2012CB720000) 国家自然科学基金资助项目(41371436) 地理信息工程国家重点实验室开放研究基金资助项目(SKLGIE2013-M-3-5)~~
【分类号】：P185.3;P23
【正文快照】： 火星是太阳系内最有可能发现生命痕迹的行星,科学家甚至梦想人类有一天能够移居火星。通过火星全球勘测者(MGS)、火星快车(MEX)、火星侦察轨道器(MRO)等轨道探测器以及勇气号、机遇号、凤凰号、好奇号等火星着陆探测器任务的成功执行,人类对火星已经有了全新的认识。火星地形

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