BMVC 2004, Kingston, 7th-9th Sept, 2004
Efficient Video Retrieval by Motion Trajectory
Y. Jin and F. Mokhtarian (University of Surrey)
This paper presents an automatic motion trajectory based surveillance
video retrieval system with an efficient and flexible trajectory matching technique
based on turning function. Raw trajectories of moving objects are extracted
by automatic tracking and described by MPEG-7 motion trajectory
descriptor with first order interpolating function. Efficient matching is performed
for translation invariant and translation-rotation invariant video retrieval
in spatial model and spatio-temporal model. In spatial model, turning
function is introduced to represent the trail of motion. In spatio-temporal
model, velocity function is used to represent the motion of object. Results of
experiment on a prototype video database indicate a promising performance
of the system.
(pdf article)