CCAH: A CLIP-Based Cycle Alignment Hashing Method for Unsupervised Vision-Text Retrieval

Table 2

Comparison results on mean accuracy (MAP@5000) for different code lengths under the Flickr-25K, NUS-WIDE, and MSCOCO dataset.

Task		MIRFLickr-25K				NUS-WIDE				MSCOCO
Method		16	32	64	128	16	32	64	128	16	32	64	128
I->T	IMH	0.681	0.659	0.643	0.633	0.607	0.623	0.619	0.591	0.737	0.687	0.681	0.659
	LSSH	0.675	0.677	0.682	0.684	0.678	0.706	0.703	0.694	0.813	0.832	0.838	0.848
	STMH	0.566	0.585	0.619	0.659	0.409	0.429	0.468	0.482	0.646	0.687	0.653	0.738
	CMFH	0.686	0.692	0.701	0.718	0.635	0.664	0.699	0.731	0.725	0.757	0.777	0.816
	FSH	0.659	0.678	0.684	0.706	0.578	0.596	0.631	0.634	0.748	0.770	0.794	0.810
	RFDH	0.636	0.648	0.658	0.681	0.551	0.572	0.608	0.649	0.690	0.710	0.749	0.782
	DJSRH	0.673	0.701	0.730	0.744	0.587	0.671	0.717	0.743	0.754	0.815	0.861	0.870
	MGAH	0.631	0.649	0.658	0.692	0.601	0.677	0.715	0.586	0.780	0.807	0.814	0.752
	JIMRH	0.611	0.622	0.633	0.632	0.493	0.516	0.551	0.588	0.660	0.706	0.732	0.756
	JDSH	0.725	0.731	0.752	0.761	0.678	0.724	0.743	0.756	0.690	0.758	0.888	0.890
	DSAH	0.639	0.766	0.779	0.789	0.724	0.753	0.772	0.778	0.850	0.881	0.900	0.900
	HNH	0.730	0.745	0.738	0.721	0.684	0.721	0.740	0.737	0.830	0.855	0.868	0.850
	DUCH	0.667	0.688	0.706	0.723	0.686	0.714	0.728	0.747	0.847	0.866	0.876	0.883
	CCAH	0.783	0.801	0.815	0.815	0.715	0.733	0.753	0.764	0.874	0.898	0.907	0.907
T->I	IMH	0.681	0.667	0.654	0.640	0.626	0.644	0.638	0.617	0.768	0.717	0.715	0.694
	LSSH	0.648	0.653	0.662	0.660	0.567	0.587	0.624	0.628	0.708	0.745	0.779	0.800
	STMH	0.643	0.674	0.690	0.694	0.581	0.611	0.645	0.675	0.686	0.769	0.811	0.833
	CMFH	0.661	0.669	0.679	0.695	0.609	0.641	0.672	0.696	0.757	0.789	0.809	0.838
	FSH	0.682	0.697	0.702	0.725	0.609	0.649	0.665	0.668	0.769	0.791	0.809	0.826
	RFDH	0.625	0.646	0.654	0.663	0.551	0.568	0.592	0.630	0.701	0.717	0.741	0.777
	DJSRH	0.675	0.691	0.698	0.712	0.601	0.656	0.707	0.719	0.759	0.832	0.862	0.869
	MGAH	0.627	0.648	0.625	0.632	0.590	0.613	0.645	0.688	0.747	0.772	0.768	0.845
	JIMRH	0.647	0.647	0.657	0.659	0.584	0.586	0.610	0.626	0.728	0.767	0.779	0.802
	JDSH	0.699	0.719	0.724	0.735	0.674	0.715	0.711	0.718	0.758	0.829	0.895	0.895
	DSAH	0.646	0.754	0.759	0.758	0.668	0.716	0.748	0.745	0.854	0.886	0.890	0.891
	HNH	0.723	0.720	0.706	0.700	0.671	0.699	0.696	0.693	0.839	0.863	0.867	0.851
	DUCH	0.652	0.668	0.681	0.697	0.662	0.694	0.709	0.713	0.860	0.885	0.898	0.903
	CCAH	0.803	0.826	0.835	0.848	0.764	0.798	0.806	0.826	0.870	0.886	0.890	0.897