Table 2. Performance of automatic figure ranking using frequency-based centrality.

System	MER	MWER	MWER-RK	ER-HR	WER-HR
FreqFullText	0.387	0.331	0.249	0.682	0.277
FreqRD	0.39	0.337	0.252	0.682	0.280
WFreqRDParaTitle	0.417†	0.369†	0.264	0.671	0.251
WFreqRDParaAbs	0.425‡	0.365‡	0.262†	0.693	0.298
WFreqRDTitle	0.389	0.340	0.245	0.638	0.246 †
WFreqRDAbs	0.379	0.319	0.228 †	0.649	0.249‡

Significance level of T test compared to the first row is noted by

^†(),

^‡() and

^§() respectively.