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Assessment of Multi-Camera Calibration Algorithms for Two-Dimensional Camera Arrays Relative to Ground Truth Position and Direction

机译:相对于地面真相位置和方向的二维摄像机阵列多摄像机标定算法的评估

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摘要

Camera calibration methods are commonly evaluated on cumulative reprojection error metrics, on disparate one-dimensional da-tasets. To evaluate calibration of cameras in two-dimensional arrays, assessments need to be made on two-dimensional datasets with constraints on camera parameters. In this study, accuracy of several multi-camera calibration methods has been evaluated on camera parameters that are affecting view projection the most. As input data, we used a 15-viewpoint two-dimensional dataset with intrinsic and extrinsic parameter constraints and extrinsic ground truth. The assessment showed that self-calibration methods using structure-from-motion reach equal intrinsic and extrinsic parameter estimation accuracy with standard checkerboard calibration algorithm, and surpass a well-known self-calibration toolbox, BlueCCal. These results show that self-calibration is a viable approach to calibrating two-dimensional camera arrays, but improvements to state-of-art multi-camera feature matching are necessary to make BlueCCal as accurate as other self-calibration methods for two-dimensional camera arrays.
机译:通常在不同的一维数据集上根据累积重投影误差度量来评估相机校准方法。为了评估二维阵列中摄像机的校准,需要对受摄像机参数约束的二维数据集进行评估。在这项研究中,已对影响投影效果最大的相机参数评估了几种多相机校准方法的准确性。作为输入数据,我们使用了具有内部和外部参数约束以及外部地面真实性的15个观点的二维数据集。评估表明,使用运动结构的自校准方法与标准棋盘格校准算法相比,具有相同的内在和外在参数估计精度,并且超过了著名的自校准工具箱BlueCCal。这些结果表明,自校准是一种校准二维相机阵列的可行方法,但是必须使最新的多相机特征匹配得到改进,以使BlueCCal像其他适用于二维相机的自校准方法一样准确数组。

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