1. Analysis and Retargeting of Ball Sports Video
Stephan Kopf, Benjamin Guthier,
Dirk Farin*, Jungong Han*
Computer Science IV, Mannheim University, Germany
*University of Technology Eindhoven, The Netherlands

2. Motivation
Goal
Improved visualization of sports video on handheld mobile devices
source: en.wikipedia.org
Novel video retargeting techniques like seam carving or warping  low quality due to distortion of court lines

3. Overview Sports Video Analysis Video Retargeting
Playing frame detection
Court line detection
Player detection
Ball detection
Video Retargeting

4. Court Line Detection

5. Court Line Detection
source: en.wikipedia.org

6. Player Detection Compensate camera motion
Merge compensated frames into a background image: apply median filter to remove foreground objects
Calculate difference image for each frame
Cluster difference pixels into regions

7. Ball detection Challenges:
Size and motion speed of the ball, blurring, interlacing artifacts, disconnected ball pixels
slow motion
fast motion

8. Video Retargeting cropping scaling sports video
(zoom on player) retargeting

9. Thank you for your attention!
Contact:
Stephan Kopf, Mannheim University, Germany
Link to paper: