He Bingwei, Chen Zhipeng, Li Youfu
School of Mechanical Engineering, Fuzhou University, Fuzhou 350108, China.
J Opt Soc Am A Opt Image Sci Vis. 2012 Nov 1;29(11):2514-24. doi: 10.1364/JOSAA.29.002514.
A central catadioptric-perspective camera system is widely used nowadays. A critical problem is that current calibration methods cannot determine the extrinsic parameters between the central catadioptric camera and a perspective camera effectively. We present a novel calibration method for a central catadioptric-perspective camera system, in which the central catadioptric camera has a hyperbolic mirror. Two cameras are used to capture images of one calibration pattern at different spatial positions. A virtual camera is constructed at the origin of the central catadioptric camera and faced toward the calibration pattern. The transformation between the virtual camera and the calibration pattern could be computed first and the extrinsic parameters between the central catadioptric camera and the calibration pattern could be obtained. Three-dimensional reconstruction results of the calibration pattern show a high accuracy and validate the feasibility of our method.
如今，一种中心折反射-透视相机系统被广泛使用。一个关键问题是，当前的校准方法无法有效地确定中心折反射相机和透视相机之间的外部参数。我们提出了一种针对中心折反射-透视相机系统的新型校准方法，其中中心折反射相机具有一个双曲线镜。使用两个相机在不同空间位置捕捉一个校准图案的图像。在中心折反射相机的原点处构建一个虚拟相机，并使其朝向校准图案。可以首先计算虚拟相机和校准图案之间的变换，从而获得中心折反射相机和校准图案之间的外部参数。校准图案的三维重建结果显示出高精度，并验证了我们方法的可行性。
