A Novel Imperialist Competitive Algorithm for Multithreshold Image Segmentation

Table 7

The average values of Ostu’s objective values.

Example	ICA	PSO	GWO	TLBO	Example	ICA	PSO	GWO	TLBO
Test1_2	1961.817	1961.817	1938.178	1961.812	Test6_2	2976.191	2976.191	2953.020	2976.191
3	2128.308	2128.308	2090.090	2128.195	3	3145.463	3145.463	3095.006	3145.392
4	2191.870	2191.870	2154.799	2191.482	4	3216.403	3216.403	3163.828	3215.248
5	2217.231	2217.516	2178.598	2216.291	5	3255.995	3253.210	3209.790	3253.837
Test2_2	1948.719	1948.719	1943.368	1948.719	Test7_2	7209.906	7209.906	7181.118	7209.906
3	2024.831	2024.834	2015.234	2024.772	3	7531.419	7531.419	7414.411	7531.202
4	2070.077	2070.076	2045.085	2069.334	4	7617.718	7617.718	7556.210	7614.405
5	2096.139	2096.135	2062.247	2094.870	5	7665.778	7664.147	7621.531	7662.482
Test3_2	1549.083	1549.083	1518.499	1549.083	Test8_2	5068.434	5068.434	5033.695	5068.434
3	1639.532	1639.532	1620.771	1639.385	3	5232.919	5232.919	5209.283	5232.787
4	1693.195	1693.190	1647.427	1692.546	4	5310.356	5310.356	5273.633	5309.334
5	1719.041	1719.044	1694.932	1717.250	5	5349.222	5349.221	5317.495	5347.035
Test4_2	2532.321	2532.321	2519.423	2532.312	Test9_2	1665.411	1665.411	1657.895	1665.411
3	2703.572	2703.572	2667.182	2703.274	3	1746.197	1746.197	1739.602	1746.118
4	2766.459	2766.459	2704.149	2765.460	4	1797.117	1797.124	1778.585	1796.539
5	2810.842	2810.838	2767.802	2809.198	5	1823.590	1823.618	1796.961	1821.105
Test5_2	2947.502	2947.502	2905.698	2947.500	Test10_2	2551.975	2551.975	2512.428	2551.975
3	3126.855	3126.855	3093.664	3126.821	3	2784.227	2784.227	2749.713	2783.919
4	3208.810	3208.810	3177.217	3207.818	4	2869.428	2869.431	2827.326	2868.631
5	3254.775	3254.797	3223.476	3251.292	5	2916.271	2916.270	2870.529	2913.415