SEGMENTING GRASS REGIONS AND PLAYFIELD IN SPORTS VIDEOS

摘要

A method for segmenting grass and playfield regions in sports videos entails: generating likelihood grass and non-grass masks; generating a grass mask using the likelihood masks; performing a first clean-up of the grass mask to generate an intermediate grass mask; generating a playfield mask using the intermediate grass mask; refining the intermediate grass mask; performing a second clean-up of the refined intermediate grass mask; constraining the grass pixels of the grass mask to be with the playfield mask; and performing a third clean-up to generate a final grass mask. The final grass mask provides a robust and accurate representation of grass regions in the video frame. A soccer application is described.