关键词: 体育科研, 运动生物力学, 三维立体框架, 摄像机标定, 平面标定

Abstract: This paper puts forward a new 3D space calibration method by using planar checkerboard
lattice calibration in based on the existing problems for using three-dimensional frame camera
calibration in the calibration range, error, portable and aging aspects. This study selected five meters,
ten meters and 30 meters of the shooting distance. Calibration reference object used traditional 3D
radiation type stereo frame and homemade two-dimensional planar checkerboard calibration plate, the
standard meter length scale for 3D reconstruction. The accuracy comparison of two kinds of
measurement results is carried out. In addition, the error distribution of the different position of the
standard one meter in the measurement space (the middle and the edge of the measuring frame) is
carried out. Experimental results showed that implemented in this paper based on planar checkerboard
calibration plate camera calibration method had significant advantages, regardless of convenience and
measurement accuracy this new method was better than three-dimensional framework and met the
needs of scientific research of physical education.

Key words: sports scientific research, sport biomechanics, three-dimensional framework, camera
calibration, plane calibration