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基于场景几何约束未标定两视图的三维模型重建

DOI: 10.11834/jig.200308328

Keywords: 计算机图象处理(520?6040),影灭点,相机标定,基本矩阵,本质矩阵,三角测量法,三维重构

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Abstract:

提出了一种从两幅未标定图象重建场景三维模型的方法.这种方法充分利用了人造结构场景中大量存在的平行性和正交性几何约束,即利用每幅视图中三组互相垂直的平行线,计算出3个影灭点,从而对每幅视图进行标定.对两幅未标定图象,从基本矩阵只能得到射影重构,如果每幅图象都已标定,则可将基本矩阵转化为本质矩阵.三维重构过程有两个步骤:先是恢复相机的位置和运动;后是用三角测量法计算出点的三维坐标.对多平面组成的场景进行三维重构实验,所得三维模型产生新的视点图象,与所观察的场景一致,重构的两个平面夹角与实际值相近,实验结果表明,该算法是行之有效的

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