AbstractThe traditional calibration paradigms fail to give reliable and accurate results in case of low-quality 2D planar calibration plates. In this paper, an active method is proposed by employing an LCD panel for camera calibration. This method automatically generates a sequence of virtual patterns in different views by pre-defined transforms without manually manipulation or other equipment’s help to move the patterns. Then, the projections of virtual patterns are captured by a camera. The homography between projective patterns in virtual world coordinate and their images is calculated directly to obtain the camera parameters. Experimental results show that the calibration error is 0.018 pixel in terms of mean re-projection error by using 18 virtual patterns, which is significantly less than the state-of-the-art methods. The proposed scheme makes camera calibration flexible and easy to use.

中文翻译：

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一种准确灵活的相机标定技术

摘要 对于低质量的二维平面标定板，传统标定范式无法给出可靠和准确的结果。在本文中，提出了一种采用 LCD 面板进行相机校准的主动方法。该方法通过预定义的变换自动在不同视图中生成一系列虚拟图案，无需手动操作或其他设备帮助移动图案。然后，虚拟图案的投影被相机捕获。直接计算虚拟世界坐标中的投影模式与其图像之间的单应性以获得相机参数。实验结果表明，使用18个虚拟图案的平均重投影误差为0.018像素，明显小于最先进的方法。