基于“天绘一号”卫星前、正、后视线阵立体影像,综合全局、局部匹配算法优劣特性,提出了半全局互信息匹配算法模型,以逐像素的互信息作为匹配基元,按照能量函数最小化原则进行整体匹配,采用金字塔和多基线的匹配策略,实现了DSM的快速获取。试验结果表明,该方法应用于天绘一号卫星影像地表模型三维重建,宏观地形表现完整,破碎地形表达准确,取得了较好的效果。
In this paper,for three-linear array stereo-imagery of Mapping Satellite-1,semi-global matching algorithm based on mutual information is researched and used in three-dimensional reconstruction.The pyramid and multiple-baseline matching strategy is adopted and mutual informationof per-pixel is regarded as matching unit and full matching is realized,according to the principle of energy function minimization.The experimental results show that the proposed method can accurately realize three-dimensional reconstruction for Mapping Satellite-1 imagery.
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