| 建筑场景三维重建中影像方位元素的获取方法 |
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| 引用本文： | 张祖勋,吴军,张剑清.建筑场景三维重建中影像方位元素的获取方法[J].武汉大学学报(信息科学版),2003,28(3):265-271,300. |
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| 作者姓名： | 张祖勋 吴军 张剑清 |
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| 作者单位： | 1. 武汉大学遥感信息工程学院,武汉市珞喻路129号,430079
2. 武汉大学测绘遥感信息工程国家重点实验室,武汉市珞喻路129号,430079 |
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| 基金项目： | 教育部高等学校博士点专项科研基金资助项目 ( 2 0 0 10 4860 11) |
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| 摘 要： | 基于影像的三维重建需要确定影像的内、外方位元素，影像中的灭点为其提供了重要的线索，但灭点位置的不确定性，影响了方位元素计算的结果。通过分析灭点几何，建立了影像直线段与方位元素的直接联系，根据最小二乘平差的有关理论，给出了迭代计算影像的内、外方位元素的方法，并在三维重建的实践中进行了验证。
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| 关 键 词： | 灭点 相机校检 最小二乘法 小孔成像 |
| 文章编号： | 1671-8860(2003)03-0265-07 |
A Method for Determining Orientation Parameters in Image-based Reconstruction of Architectural Scenes |
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| ZHANG Zuxun,WU Jun,ZHENG Jianqing.A Method for Determining Orientation Parameters in Image-based Reconstruction of Architectural Scenes[J].Geomatics and Information Science of Wuhan University,2003,28(3):265-271,300. |
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| Authors: | ZHANG Zuxun WU Jun ZHENG Jianqing |
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| Institution: | ZHANG Zuxun 1 WU Jun 2 ZHENG Jianqing 1 |
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| Abstract: | This paper describes a method for the determination of orientation parameters of the un-calibrated images involved in the image-based reconstruction of architectural scenes. This approach is implemented in a collection of the geometrically intuitive vanishing point method and conditional least squares adjustment with unknown parameters algorithm. We exploit the abundant parallel and orthogonal object lines to find out the vanishing point forthe main direction and sequentially lead to the initial orientation parameters values. Then, more precise and stable values are found by an optimizing algorithm, based on conditional least squares adjustment with unknown parameters. During the iterative process in this algorithm, orientation parameters of the image are recalculated. Last, these orientation parameters are used to reconstruct textures landscape of the buildings by combining the vector and texture data in image. |
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| Keywords: | vanishing point camera calibration least squares |
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