id: 05797811
dt: j
an: 05797811
au: Chu, Wei-Ta; Tsai, Wen-Ho
ti: Modeling spatiotemporal relationships between moving objects for event
    tactics analysis in tennis videos.
so: Multimedia Tools Appl. 50, No. 1, 149-171 (2010).
py: 2010
pu: Springer, Norwell, MA
la: EN
cc: 
ut: event detection; tactics analysis; spatiotemporal modeling; tennis video
    analysis
ci: 
li: doi:10.1007/s11042-009-0363-z
ab: Summary: Evolution of spatial relationships between objects often provides
    important clues for semantic video analysis. We present a symbolic
    representation that describes spatiotemporal characteristics and
    facilitates tactics detection based on string matching. To find typical
    spatiotemporal patterns of a targeted tactic, we organize training
    sequences as a tree, and effectively discover frequent patterns from
    the structure. Tactics detection is conducted by comparing a given test
    sequence with these frequent patterns. To realize the proposed idea, we
    develop elaborate audio/video processes to transform broadcasting
    tennis videos into symbolic sequences, and comprehensively tackle event
    detection and tactics analysis. We experiment on ten most important
    tennis championships in the year 2008, and report promising detection
    results on seven events/tactics. We demonstrate not only the
    effectiveness of the proposed methods, but also study the impacts
    brought by the results of tactics analysis.
rv: