基于运动场地中心圆和中间线的摄像机标定及运动目标位置估计

IF 1.1 4区 物理与天体物理 Q4 OPTICS
Xuemei Yang, Xiaomei Kou, Yue Zhao
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引用次数: 0

摘要

在各种体育运动中,经常需要测量运动员的运动信息进行监测和评价,而直接利用常见的光学设备根据场景中的几何信息来确定运动物体的位置和方向已经成为图像理解中的一个重要研究课题。由于许多运动场都有圆心圆和中线,我们提出了一种算法,首先根据圆的周长和相应的周向角的几何性质,利用单应性获得对圆心图像的约束。然后,根据相机内部参数的极极关系,从圆心图像和完整的圆图像中得到消失线;通过对圆图像进行分解,得到相机外部参数,确定空间点到图像点的单应性矩阵。根据二次矩阵和单应性矩阵的对偶性对运动场边缘的摄像机进行标定。利用运动地平面上的点与相应图像点之间的单应性矩阵,可以恢复测点的坐标,以估计运动目标的位姿(即位置和方向)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Camera calibration based on center circle and halfway line of sports ground and position estimation of moving target

In various sports, the motion information of athletes is often measured for monitoring and evaluation, and the direct use of common optical equipment to determine the position and orientation of moving objects according to geometric information in a scene has become an important research topic in image understanding. As many sports grounds have a center circle and halfway line, we propose an algorithm that first obtains constraints on the image of the circle center by using homography based on the geometric properties of the circle perimeter and corresponding circumferential angle. Then, the vanishing line is obtained from the image of the circle center and the complete circle image based on the pole-polar relation with respect to the camera internal parameters. By decomposing the circle image, the camera external parameters are obtained to determine the homography matrix from a spatial point to an image point. The camera at the edge of the moving field is calibrated according to the duality of the conic and homography matrices. Using the homography matrix between a point on the moving ground plane and the corresponding image point, the coordinates of the measured point can be recovered to estimate the pose (i.e., position and orientation) of a moving target.

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来源期刊
Optical Review
Optical Review 物理-光学
CiteScore
2.30
自引率
0.00%
发文量
62
审稿时长
2 months
期刊介绍: Optical Review is an international journal published by the Optical Society of Japan. The scope of the journal is: General and physical optics; Quantum optics and spectroscopy; Information optics; Photonics and optoelectronics; Biomedical photonics and biological optics; Lasers; Nonlinear optics; Optical systems and technologies; Optical materials and manufacturing technologies; Vision; Infrared and short wavelength optics; Cross-disciplinary areas such as environmental, energy, food, agriculture and space technologies; Other optical methods and applications.
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