Image Multithreshold Segmentation Method Based on Improved Harris Hawk Optimization

Table 6

Experimental results based on Renyi entropy.

Image	Threshold number	IMHHO			HHO-DE			SFO			EO			PFA
		PSNR	MEAN	STD	PSNR	MEAN	STD	PSNR	MEAN	STD	PSNR	MEAN	STD	PSNR	MEAN	STD
Cameraman	2	16.8288	4.9899	0.0013	16.4819	4.9876	0.0021	16.5259	4.9545	0.0016	16.6501	4.9834	0.0034	16.7458	4.9833	0.0053
	3	21.8257	6.3598	0.0197	21.7609	6.3315	0.0377	21.7684	6.2832	0.0722	21.7538	6.3430	0.0262	21.5186	6.2957	0.0500
	4	26.2161	7.7124	0.0457	25.4953	7.6726	0.0484	25.9843	7.6155	0.0793	26.1177	7.7007	0.0625	25.5857	7.6985	0.0768
	5	27.5574	8.8832	0.0440	26.7661	8.7951	0.0465	25.8616	8.8755	0.0541	26.0527	8.8388	0.0497	26.5031	8.7673	0.0705
Cameraman-transformed	2	22.9726	3.8943	0.0012	22.6337	3.8617	0.0020	22.4895	3.8557	0.0144	22.4726	3.8640	0.0017	22.3911	3.8537	0.0104
	3	25.0708	5.3491	0.0190	24.6892	5.3488	0.0204	24.9521	5.3406	0.0510	24.2488	5.3584	0.0066	23.9675	5.3318	0.0306
	4	27.3064	6.8045	0.0118	26.6975	6.7620	0.0642	26.4832	6.7785	0.0176	26.3852	6.7976	0.0102	24.6354	6.5601	0.0895
	5	28.8269	7.9766	0.0397	27.7662	7.8670	0.0765	27.5691	7.9483	0.0534	27.2407	7.9500	0.0444	26.9240	7.8433	0.1145
Lena	2	21.2228	5.29438	0.0013	21.2221	5.2919	0.0008	21.1228	5.2933	0.0014	21.1782	5.2920	0.0022	21.2025	5.2893	0.0037
	3	23.9928	6.5685	0.0060	23.8824	6.5586	0.0041	23.6558	6.5510	0.0110	23.7421	6.5511	0.0069	23.8157	6.5540	0.0076
	4	25.2483	7.6783	0.0133	24.8414	7.6681	0.0260	25.0006	7.6557	0.0235	24.7115	7.6613	0.0132	25.1864	7.6653	0.0089
	5	26.9077	8.7609	0.0565	26.1303	8.7196	0.0820	25.6008	8.7193	0.0943	25.6374	8.7303	0.0126	25.6206	8.6916	0.0605
Lena-transformed	2	17.5262	4.2467	0.0024	15.5887	4.0465	0.0030	17.3988	4.0441	0.0013	15.5887	4.0476	0.0032	15.7589	4.0445	0.0010
	3	21.8272	5.4451	0.0054	21.1423	5.3433	0.0075	21.2042	5.3331	0.0083	21.1481	5.3487	0.0032	21.3214	5.3346	0.0151
	4	23.2937	6.6175	0.0075	22.5267	6.5603	0.0393	22.8686	6.5087	0.0104	23.0741	6.5729	0.0157	23.0468	6.5501	0.0288
	5	26.0862	7.7781	0.0702	24.3911	7.7465	0.0712	22.9114	7.6751	0.0366	25.7832	7.7152	0.1250	23.5166	7.6905	0.0740
Baboon	2	20.3327	5.2185	0.0002	20.2251	5.2107	0.0009	20.2251	5.2107	0.0009	20.2251	5.2109	0.0005	20.2142	5.2088	0.0021
	3	21.5933	6.5082	0.0019	21.5191	6.4938	0.0083	21.3096	6.4826	0.0160	21.2203	6.5037	0.0020	21.5635	6.4908	0.0119
	4	22.7100	7.7122	0.0051	22.4336	7.6634	0.0185	22.1701	7.6826	0.0212	22.5418	7.7059	0.0148	23.1717	7.6806	0.0116
	5	24.2430	8.8268	0.0223	24.0304	8.7755	0.0462	23.5508	8.8193	0.0389	23.9204	8.8137	0.0256	23.1716	8.7362	0.0249
Baboon-transformed	2	18.5812	3.8094	0.0000	18.3812	3.8092	0.0002	18.4499	3.8067	0.0029	18.3812	3.8094	5.5774	18.3812	3.8092	0.0002
	3	22.9745	5.2104	0.0094	22.1814	5.1893	0.0005	22.3336	5.1772	0.0135	22.2628	5.1881	0.0016	22.4023	5.1855	0.0040
	4	23.9176	6.4604	0.0062	23.3477	6.4401	0.0164	23.6015	6.3724	0.0735	23.7348	6.4643	0.0051	23.7946	6.4463	0.0115
	5	25.1203	7.6123	0.0211	24.2451	7.6027	0.0280	24.3522	7.5928	0.0329	24.4263	7.6031	0.0016	23.8654	7.5864	0.0305
Peppers	2	20.6598	5.3482	0.0021	20.5531	5.3443	0.0029	20.6385	5.3472	0.0040	20.5432	5.3485	7.0250	20.6389	5.3453	0.0056
	3	22.4991	6.7450	0.0287	22.4136	6.6982	0.0378	22.1454	6.7257	0.0640	22.2312	6.7555	0.0197	22.4176	6.7585	0.0112
	4	25.5525	7.9801	0.0305	25.0010	7.9405	0.0445	23.2766	7.9030	0.0450	25.2300	7.9707	0.0458	24.8265	7.9185	0.0675
	5	26.7335	9.1153	0.0077	26.2390	9.0426	0.0146	26.6468	9.0438	0.0581	26.3325	9.0575	0.0185	26.5189	9.0019	0.0486
Peppers-transformed	2	18.6160	4.0967	0.0040	18.5168	4.0677	0.0058	18.4561	4.0671	0.0075	18.4411	4.0590	0.0064	18.4411	4.0622	0.0069
	3	20.0216	5.4939	0.0173	19.8231	5.4687	0.0292	19.5747	5.4234	0.0226	19.3507	5.4210	0.0475	19.8458	5.4225	0.0771
	4	25.5211	6.7514	0.0116	25.2559	6.6949	0.0133	24.9096	6.6041	0.0296	24.8699	6.6807	0.0181	24.8613	6.6397	0.0389
	5	28.3026	7.9600	0.0822	27.9741	7.9179	0.0997	27.8286	7.8786	0.1338	27.2598	7.9405	0.0154	27.7513	7.8286	0.1122