Category	Indicator	Experiment data	Empirical data
Football field	Precision	0.9076	0.9230
Football field	Recall	0.9833	0.9677
Basketball court	Precision	0.8767	0.8238
Basketball court	Recall	0.8533	0.8125
Tennis court	Precision	0.9275	0.8518
Tennis court	Recall	0.9411	0.8846
Baseball field	Precision	0.8593	0.7778
Baseball field	Recall	0.9649	1.0
Overall	mPrecision	0.8927	0.8441
Overall	mRecall	0.9356	0.9162