Title :
3D Estimation and Visualization of Motion in a Multicamera Network for Sports
Author :
Kumar, Ajit ; Chavan, P. Shashidhar ; Sharatchandra, V.K. ; David, Stoppa ; Kelly, Patrick ; O´Connor, Noel E.
Author_Institution :
Nat. Inst. of Technol. Karnataka, Mangalore, India
Abstract :
In this work, we develop image processing and computer vision techniques for visually tracking a tennis ball, in 3D, on a court instrumented with multiple low-cost IP cameras. The technique first obtains 2D ball tracking data from each camera view using 2D object tracking methods. Next, an automatic feature-based video synchronization method is applied. This technique uses the extracted 2D ball information from two or more camera views, plus camera calibration information. In order to find 3D trajectory, the temporal 3D locations of the ball is estimated using triangulation of correspondent 2D locations obtained from automatically synchronized videos. Furthermore, in order to improve the continuity of the tracked 3D ball during times when no two cameras have overlapping views of the ball location, we incorporate a physics-based trajectory model into the system. The resultant 3D ball tracks are then visualized in a virtual 3D graphical environment. Finally, we quantify the accuracy of our system in terms of reprojection error.
Keywords :
calibration; cameras; computer graphics; image processing; motion estimation; object tracking; sport; synchronisation; 2D ball information; 2D object tracking; 2D tennis ball tracking; 3D motion estimation; IP cameras; camera calibration information; computer vision; image processing; motion visualization; multicamera network; physics based trajectory model; reprojection error; video synchronization; virtual 3D graphical environment; Calibration; Cameras; Sports equipment; Streaming media; Synchronization; Three dimensional displays; Trajectory;
Conference_Titel :
Machine Vision and Image Processing Conference (IMVIP), 2011 Irish
Conference_Location :
Dublin
Print_ISBN :
978-1-4673-0230-2
DOI :
10.1109/IMVIP.2011.12