Table 1: Experimental results of nine methods on the five databases with  $50\%$  missing-view rate,  $50\%$  missing-label rate, and  $70\%$  training samples. 'Ave.R' denotes the average ranking of the corresponding method on all six metrics.
Data	Metric Sources	C2AE[37] AAAI '17	GLOCAL[38]CDMM[18] TKDE '17	DM2L[39] KBS '20	LVSL[23] PR '21	iMVWL[26] TMM '22	NAIM3L[25] IJCAI '18	DICNet[20] TPAMI '22	AAAI '23	MTD -
Corel5k	AP	0.2270.008	0.2850.004	0.3540.004	0.2620.005	0.3420.004	0.2830.008	0.3090.004	0.3810.004	0.4150.008
1-HL	0.9800.002	0.9870.000	0.9870.000	0.9870.000	0.9870.000	0.9870.000	0.9870.000	0.9880.000	0.9880.000
1-RL	0.8040.010	0.8400.003	0.8840.003	0.8430.002	0.8810.003	0.8650.005	0.8780.002	0.8820.004	0.8930.004
AUC	0.8060.010	0.8430.003	0.8880.003	0.8450.002	0.8840.003	0.8680.005	0.8810.002	0.8840.004	0.8960.004
1-OE	0.2460.016	0.3270.010	0.4100.007	0.2950.014	0.3910.009	0.3110.015	0.3500.009	0.4680.007	0.4910.012
1-Cov	0.5960.016	0.6480.006	0.7230.007	0.6470.005	0.7180.006	0.7020.008	0.7250.005	0.7270.011	0.7490.009
Ave.R	8.83	6.33	2.83	6.83	3.83	6.83	4.33	2.17	1.00
Pascal07	AP	0.4850.008	0.4960.004	0.5080.005	0.4710.008	0.5040.005	0.4370.018	0.4880.003	0.5050.012	0.5510.004
1-HL	0.9080.002	0.9270.000	0.9310.001	0.9280.001	0.9300.000	0.8820.004	0.9280.001	0.9290.001	0.9320.001
1-RL	0.7450.009	0.7670.004	0.8120.004	0.7610.005	0.8060.003	0.7360.015	0.7830.001	0.7830.008	0.8310.003
AUC	0.7650.010	0.7860.003	0.8380.003	0.7790.004	0.8320.002	0.7670.015	0.8110.001	0.8090.006	0.8510.003
1-OE	0.4380.008	0.4430.005	0.4190.008	0.4200.011	0.4190.008	0.3620.023	0.4210.006	0.4270.015	0.4590.007
1-Cov	0.6800.010	0.7030.004	0.7590.003	0.6920.004	0.7510.003	0.6770.015	0.7270.002	0.7310.006	0.7840.003
Ave.R	7.17	5.33	2.83	6.67	3.83	8.83	4.83	4.00	1.00
ESPGame	AP	0.2020.006	0.2210.002	0.2890.003	0.2120.002	0.2850.003	0.2440.005	0.2460.002	0.2970.002	0.3060.003
1-HL	0.9710.002	0.9820.000	0.9830.000	0.9820.000	0.9830.000	0.9720.000	0.9830.000	0.9830.000	0.9830.000
1-RL	0.7720.006	0.7800.004	0.8320.001	0.7810.001	0.8290.001	0.8080.002	0.8180.002	0.8320.001	0.8370.002
AUC	0.7770.006	0.7840.004	0.8360.001	0.7850.001	0.8330.002	0.8130.002	0.8240.002	0.8360.001	0.8420.002
1-OE	0.2620.018	0.3170.005	0.3960.005	0.2940.006	0.3890.004	0.3430.013	0.3390.003	0.4390.007	0.4470.009
1-Cov	0.4970.011	0.4960.006	0.5740.004	0.4880.003	0.5670.005	0.5480.004	0.5710.003	0.5930.003	0.6020.004
Ave.R	8.67	7.33	2.33	7.50	3.67	6.17	4.33	1.83	1.00
IAPRTC12	AP	0.2240.007	0.2560.002	0.3050.004	0.2340.003	0.3040.004	0.2370.003	0.2610.001	0.3230.001	0.3320.003
1-HL	0.9650.002	0.9800.000	0.9810.000	0.9800.000	0.9810.000	0.9690.000	0.9800.000	0.9810.000	0.9810.000
1-RL	0.8060.005	0.8250.002	0.8620.002	0.8230.002	0.8610.002	0.8330.002	0.8480.001	0.8730.001	0.8750.002
AUC	0.8070.005	0.8300.001	0.8640.002	0.8250.001	0.8630.001	0.8350.001	0.8500.001	0.8740.000	0.8760.001
1-OE	0.3000.031	0.3780.007	0.4320.008	0.3400.006	0.4290.009	0.3520.008	0.3900.005	0.4680.002	0.4670.005
1-Cov	0.5230.009	0.5340.003	0.5970.004	0.5290.004	0.5970.004	0.5640.005	0.5920.004	0.6490.001	0.6490.004
Ave.R	9.00	6.33	2.67	7.50	3.33	6.67	5.00	1.50	1.17
MIRFLICKR	AP	0.5050.008	0.5370.002	0.5700.002	0.5140.006	0.5530.002	0.4900.012	0.5510.002	0.5890.005	0.6070.004
1-HL	0.8530.004	0.8740.001	0.8860.001	0.8780.001	0.8850.001	0.8390.002	0.8820.001	0.8880.002	0.8910.001
1-RL	0.8210.003	0.8320.001	0.8560.001	0.8310.003	0.8560.001	0.8030.008	0.8440.001	0.8630.004	0.8750.002
AUC	0.8100.004	0.8280.001	0.8460.001	0.8280.003	0.8440.001	0.7870.012	0.8370.001	0.8490.004	0.8620.002
1-OE	0.5050.020	0.5520.005	0.6310.004	0.5100.008	0.6070.004	0.5110.022	0.5850.003	0.6370.007	0.6550.004
1-Cov	0.5900.005	0.6050.003	0.6400.001	0.6040.005	0.6360.001	0.5720.013	0.6310.002	0.6520.007	0.6760.004
Ave.R	8.17	6.17	3.00	6.83	3.83	8.67	5.00	2.00	1.00