TABLE II.

Comparative performances of different methods in terms of seen recall $\left({\text{RE}}_{\mathcal{S}}\right)$, unseen recall $\left({\text{RE}}_{\mathcal{U}}\right)$ and harmonic mean of seen and unseen recall $\left({\text{RE}}_{\mathcal{H}}\right)$ for combination 1 of seen and unseen classes from TABLE I. Bold fonts indicate the best values in each column.

Methods	NIH				NIH-900				Open-i				PMC
	$\mathbf{\text{R}}{\mathbf{\text{e}}}_{\mathcal{S}}$	$\mathbf{\text{R}}{\mathbf{\text{e}}}_{\mathcal{U}}$	$\mathbf{\text{R}}{\mathbf{\text{e}}}_{\mathcal{H}}$		$\mathbf{\text{R}}{\mathbf{\text{e}}}_{\mathcal{S}}$	$\mathbf{\text{R}}{\mathbf{\text{e}}}_{\mathcal{U}}$	$\mathbf{\text{R}}{\mathbf{\text{e}}}_{\mathcal{H}}$		$\mathbf{\text{R}}{\mathbf{\text{e}}}_{\mathcal{S}}$	$\mathbf{\text{R}}{\mathbf{\text{e}}}_{\mathcal{U}}$	$\mathbf{\text{R}}{\mathbf{\text{e}}}_{\mathcal{H}}$		$\mathbf{\text{R}}{\mathbf{\text{e}}}_{\mathcal{S}}$	$\mathbf{\text{R}}{\mathbf{\text{e}}}_{\mathcal{U}}$	$\mathbf{\text{R}}{\mathbf{\text{e}}}_{\mathcal{H}}$
ESZSL(X)	38.14	0.00	0.00		38.63	0.00	0.00		29.34	0.00	0.00		25.71	0.00	0.00
ESZSL(CT)	24.23	1.42	2.68		32.67	0.00	0.00		45.10	0.00	0.00		30.00	0.00	0.00
DeVise(X)	0.00	34.79	0.00		0.00	14.90	0.00		0.00	22.07	0.00		0.00	21.21	0.00
DeVise(CT)	5.49	0.15	0.29		14.33	0.00	0.00		21.23	0.00	0.00		17.14	0.00	0.00
SAE(X)	29.57	8.00	12.59		30.67	9.13	14.08		34.25	10.39	15.94		11.43	9.09	10.13
SAE(CT)	29.17	8.63	13.32		29.67	9.62	14.52		29.45	11.43	16.47		11.43	12.12	11.76
GMN(X)	32.88	6.07	10.24		33.08	3.51	6.34		37.33	5.48	9.56		17.07	11.76	13.93
GMN(CT)	35.07	5.33	9.25		26.26	1.56	2.94		30.48	1.60	3.04		12.20	2.94	4.74
GDAN(X)	34.94	7.27	12.04		27.78	8.97	13.56		35.27	5.94	10.16		26.93	2.94	5.30
GDAN(CT)	32.14	8.95	14.00		29.80	6.24	10.32		31.51	4.57	7.98		31.71	5.88	9.92
Proposed	30.12	19.67	23.80		40.72	45.40	42.93		37.74	41.13	39.36		25.71	30.30	27.82