Multilevel Image Segmentation Based on an Improved Firefly Algorithm

Table 4

Objective function values obtained by the four methods.

Test images		Objective function values
		DPSO	HDE	FA	IFA
Lena	2	1993.294	1993.294	1993.294	1993.294
	3	2162.980	2162.980	2162.980	2162.980
	4	2229.253	2229.253	2229.253	2229.253
	5	2253.910	2253.905	2253.910	2253.910
Cameraman	2	3650.335	3650.335	3650.335	3650.335
	3	3725.715	3725.715	3725.715	3725.715
	4	3780.663	3780.687	3780.687	3780.687
	5	3811.995	3811.969	3812.009	3812.009
Baboon	2	1712.177	1712.177	1712.177	1712.177
	3	1805.536	1805.536	1805.536	1805.536
	4	1858.560	1858.496	1858.560	1858.560
	5	1888.173	1887.624	1888.204	1888.204
Peppers	2	2532.321	2532.321	2532.321	2532.321
	3	2703.572	2703.572	2703.572	2703.572
	4	2766.459	2766.459	2766.459	2766.459
	5	2810.842	2810.830	2810.842	2810.842
QFN1	2	8639.842	8639.842	8639.842	8639.842
	3	8712.686	8712.686	8712.686	8712.686
	4	8744.161	8744.161	8744.161	8744.161
	5	8759.376	8759.372	8759.375	8759.376
QFN2	2	9863.972	9863.972	9863.972	9863.972
	3	9925.391	9925.391	9925.391	9925.391
	4	9953.834	9953.834	9953.834	9953.834
	5	9967.853	9967.858	9967.862	9967.862
QFN3	2	9303.764	9303.764	9303.764	9303.764
	3	9376.492	9376.492	9376.492	9376.492
	4	9408.903	9408.896	9408.903	9408.903
	5	9425.306	9425.307	9425.307	9425.307