Robust Bundle Adjustment Revisited

Robust Bundle Adjustment Revisited
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DOI:
10.1007/978-3-319-10602-1_50
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发表时间:
2014-09
期刊:
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影响因子:
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通讯作者:
C. Zach
C. Zach
中科院分区:
其他
文献类型:
--
作者:
C. Zach

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在这项工作中,我们解决稳健估计的光束法平差过程。通常,光束法平差不是通过一般的优化算法来解决的,而是通常被转换为非线性最小二乘问题实例。为了处理光束法平差中的粗野值,必须对最小二乘公式进行抗差处理。我们研究了几种方法,使最小二乘目标的鲁棒性,同时保留最小二乘性质,使用现有的高效求解器。特别是,我们强调了一种方法的基础上liftinga强大的成本函数到一个更高的维度表示,并显示如何解除制定有效地实现了高斯-牛顿框架。在我们的实验中,所提出的基于提升的方法几乎总是产生最好的(即最低的)目标。
In this work we address robust estimation in the bundle adjustment procedure. Typically, bundle adjustment is not solved via a generic optimization algorithm, but usually cast as a nonlinear least-squares problem instance. In order to handle gross outliers in bundle adjustment the least-squares formulation must be robustified. We investigate several approaches to make least-squares objectives robust while retaining the least-squares nature to use existing efficient solvers. In particular, we highlight a method based onliftinga robust cost function into a higher dimensional representation, and show how the lifted formulation is efficiently implemented in a Gauss-Newton framework. In our experiments the proposed lifting-based approach almost always yields the best (i.e. lowest) objectives.