Table 19.

SSIM results of 3D medical image segmentation using Kapur's method for all algorithms.

Image	K	Algorithms
		SOA [41]	HHOA [35]	FPA [18]	CS [19]	HS [15]	SCA [22]	BA [23]	COVID-HHOA
Medical1	6	0.9649	0.9632	0.9552	0.9680	0.9601	0.9624	0.9635	0.9650
	8	0.9621	0.9738	0.9621	0.9701	0.9668	0.9700	0.9734	0.9755
	10	0.9743	0.9765	0.9673	0.9732	0.9723	0.9733	0.9767	0.9788
	12	0.9792	0.9800	0.9720	0.9768	0.9756	0.9775	0.9785	0.9809
	14	0.9807	0.9813	0.9750	0.9807	0.9779	0.9795	0.9810	0.9818
Medical2	6	0.9588	0.9578	0.9244	0.9529	0.9500	0.9448	0.9513	0.9600
	8	0.9635	0.9631	0.9477	0.9638	0.9549	0.9588	0.9650	0.9664
	10	0.9697	0.9688	0.9545	0.9686	0.9600	0.9671	0.9694	0.9701
	12	0.9713	0.9729	0.9622	0.9721	0.9640	0.9702	0.9710	0.9735
	14	0.9725	0.9742	0.9648	0.9734	0.9681	0.9688	0.9735	0.9745
Medical3	6	0.9044	0.9012	0.8415	0.8968	0.8648	0.9026	0.8894	0.9055
	8	0.9123	0.9187	0.8829	0.9106	0.8835	0.9107	0.9059	0.9240
	10	0.9298	0.9276	0.9074	0.9220	0.9038	0.9168	0.9266	0.9323
	12	0.9321	0.9332	0.9100	0.9324	0.9235	0.9215	0.9322	0.9424
	14	0.9386	0.9373	0.9166	0.9421	0.9326	0.9335	0.9404	0.9453
Medical4	6	0.8301	0.8327	0.8008	0.8314	0.8109	0.8420	0.8450	0.8470
	8	0.8470	0.8378	0.8165	0.8373	0.8149	0.8433	0.8480	0.8535
	10	0.8531	0.8409	0.8268	0.8463	0.8227	0.8485	0.8499	0.8557
	12	0.8540	0.8421	0.8342	0.8525	0.8402	0.8531	0.8541	0.8566
	14	0.8558	0.8456	0.8452	0.8565	0.8416	0.8552	0.8599	0.8644
Medical5	6	0.9583	0.9610	0.9504	0.9371	0.9485	0.9542	0.9543	0.9620
	8	0.9675	0.9653	0.9598	0.9441	0.9592	0.9624	0.9661	0.9688
	10	0.9719	0.9743	0.9637	0.9648	0.9652	0.9659	0.9734	0.9750
	12	0.9732	0.9751	0.9688	0.9682	0.9695	0.9702	0.9747	0.9758
	14	0.9750	0.9769	0.9664	0.9707	0.9719	0.9720	0.9760	0.9772
Medical6	6	0.9213	0.9204	0.8700	0.9160	0.9131	0.9191	0.9211	0.9244
	8	0.9420	0.9412	0.9145	0.9415	0.9327	0.9265	0.9419	0.9430
	10	0.9569	0.9565	0.9277	0.9589	0.9476	0.9519	0.9554	0.9579
	12	0.9590	0.9604	0.9412	0.9591	0.9516	0.9645	0.9608	0.9612
	14	0.9618	0.9648	0.9479	0.9632	0.9576	0.9577	0.9665	0.9652
Average		0.9380	0.9374	0.9192	0.9350	0.9268	0.9348	0.9381	0.9421