TY - CONF
T1 - Multi-scale video cropping
T2 - Proceedings of the 15th international conference on Multimedia
Y1 - 2007
A1 - El-Alfy,Hazem
A1 - Jacobs, David W.
A1 - Davis, Larry S.
KW - shortest path algorithm
KW - Surveillance
KW - video cropping
AB - We consider the problem of cropping surveillance videos. This process chooses a trajectory that a small sub-window can take through the video, selecting the most important parts of the video for display on a smaller monitor. We model the information content of the video simply, by whether the image changes at each pixel. Then we show that we can find the globally optimal trajectory for a cropping window by using a shortest path algorithm. In practice, we can speed up this process without affecting the results, by stitching together trajectories computed over short intervals. This also reduces system latency. We then show that we can use a second shortest path formulation to find good cuts from one trajectory to another, improving coverage of interesting events in the video. We describe additional techniques to improve the quality and efficiency of the algorithm, and show results on surveillance videos.
JA - Proceedings of the 15th international conference on Multimedia
T3 - MULTIMEDIA '07
PB - ACM
CY - New York, NY, USA
SN - 978-1-59593-702-5
UR - http://doi.acm.org/10.1145/1291233.1291255
M3 - 10.1145/1291233.1291255
ER -