Improved Glowworm Swarm Optimization Algorithm for Multilevel Color Image Thresholding Problem

Table 9

Comparison of optimal PSNR (dB) and SSIM values obtained by IGSO, GSO, APSO, and SaDE algorithms using MCE.

Image		IGSO		GSO		APSO		SaDE
		PSNR	SSIM	PSNR	SSIM	PSNR	SSIM	PSNR	SSIM
Airplane	2	10.0178	0.7896	10.0178	0.7896	10.0178	0.7896	10.0178	0.7896
	4	10.0216	0.8394	10.0216	0.8394	10.0216	0.8394	10.0216	0.8394
	6	10.0381	0.8794	10.0311	0.8708	10.0232	0.8617	10.0258	0.8659
	8	10.0641	0.9308	10.0592	0.9248	10.0516	0.9101	10.0548	0.9159
Couple	2	27.0372	0.8270	27.0372	0.8270	27.0372	0.8270	27.0372	0.8270
	4	27.0478	0.8860	27.0478	0.8860	27.0478	0.8860	27.0478	0.8860
	6	27.0568	0.9128	25.0526	0.9032	27.0499	0.8929	27.0512	0.8973
	8	27.0613	0.9460	25.0588	0.9343	27.0523	0.9290	27.0562	0.9311
Flower	2	19.3352	0.8696	19.3352	0.8696	19.3352	0.8696	19.3352	0.8696
	4	19.3369	0.9037	19.3369	0.9037	19.3369	0.9037	19.3369	0.9037
	6	19.3385	0.9385	19.3376	0.9243	19.3370	0.9159	19.3373	0.9213
	8	19.3439	0.9679	19. 3417	0.9538	19.3389	0.9337	19.3402	0.9446
Girl	2	24.0684	0.7274	24.0684	0.7274	24.0684	0.7274	24.0684	0.7274
	4	24.0725	0.8369	24.0725	0.8369	24.0725	0.8369	24.0725	0.8369
	6	24.0761	0.8740	24.0749	0.8649	27.0732	0.8568	24.0740	0.8614
	8	24.0844	0.9192	24.0824	0.9069	24.0771	0.8903	24.0792	0.8971
Monarch	2	19.4791	0.7605	19.4791	0.7605	19.4791	0.7605	19.4791	0.7605
	4	19.4851	0.8648	19.4851	0.8648	19.4851	0.8648	19.4851	0.8648
	6	19.4867	0.9208	19.4862	0.9121	19.4850	0.9032	19.4855	0.9085
	8	19.4939	0.9524	19.4902	0.9408	19,4879	0.9264	19.4893	0.9336
Pen	2	19.8970	0.8281	19.8970	0.8281	19.8970	0.8281	19.8970	0.8281
	4	19.8992	0.8878	19.8992	0.8878	19.8992	0.8878	19.8992	0.8878
	6	19.8996	0.9317	19.8993	0.9244	19.8987	0.9117	19.8991	0.9184
	8	19.9052	0.9637	19.9021	0.9546	19.8994	0.9396	19.9010	0.9441
Pepper	2	18.1823	0.8189	18.1823	0.8189	18.1823	0.8189	18.1823	0.8189
	4	18.1849	0.8460	18.1849	0.8460	18.1849	0.8460	18.1849	0.8460
	6	18.1867	0.9021	18.1860	0.8967	18.1848	0.8815	18.1853	0.8913
	8	18.1897	0.9483	18.1883	0.9377	18.1860	0.9239	18.1875	0.9314
Soccer	2	20.3415	0.8016	20.3415	0.8016	20.3415	0.8016	20.3415	0.8016
	4	20.3378	0.8512	20.3378	0.8512	20.3378	0.8512	20.3378	0.8512
	6	20.3471	0.9071	20.3442	0.8992	20.3496	0.8869	20.3411	0.8983
	8	20.3499	0.9560	20.3475	0.9477	20.3420	0.9298	20.3448	0.9329
Test	2	18.5027	0.7658	18.5027	0.7658	18.5027	0.7658	18.5027	0.7658
	4	18.5155	0.8560	18.5155	0.8560	18.5155	0.8560	18.5155	0.8560
	6	18.5157	0.9021	18.5154	0.8938	18.5153	0.8802	18.5154	0.8859
	8	18.5168	0.9533	18.5161	0.9486	18.5156	0.9372	18.5158	0.9400
Yacht	2	18.5135	0.8195	18.5135	0.8195	18.5135	0.8195	18.5135	0.8195
	4	18.5172	0.8611	18.5172	0.8611	18.5172	0.8611	18.5172	0.8611
	6	18.5188	0.9150	18.5179	0.9021	18.5174	0.8851	18.5177	0.8960
	8	18.5203	0.9608	18.5186	0.9454	18.5178	0.9287	18.5182	0.9342