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3D estimation and visualization of motion in a multicamera network for sports

Kelly, Philip and O'Connor, Noel E. (2011) 3D estimation and visualization of motion in a multicamera network for sports. In: Irish Machine Vision and Image Processing Conference (IMVIP 2011), 7-9 Sept 2011, Dublin, ireland.

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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 extracts 2D ball track data from each camera view, using object tracking methods. Next, an automatic feature- based video synchronization method is applied. This technique uses both the extracted 2D ball information from two or more camera views, plus camera calibration information. Then, 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, we also incorporate a physics-based trajectory model into the system to improve the continuity of the tracked 3D ball during times when no two cameras have overlapping views of the ball location. 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.

Item Type:Conference or Workshop Item (Paper)
Event Type:Conference
Uncontrolled Keywords:computer vision techniques; object tracking
Subjects:Computer Science > Image processing
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Electronic Engineering
Research Initiatives and Centres > CLARITY: The Centre for Sensor Web Technologies
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:16575
Deposited On:10 Oct 2011 14:21 by Philip Kelly. Last Modified 10 Oct 2011 14:21

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