segmentation. The output, about whether the ball is in play, reveals high-level structure of
the content. The first step is to classify each sample frame into 3 kinds of view using a unique
domain-specific feature, grass-area-ratio. Here the grass value and classification rules are
learned and automatically adjusted to each new clip. Then heuristic rules are used in
processing the view label sequence, and obtain play/break status of the game. The results …