Multilevel Image Segmentation Based on an Improved Firefly Algorithm

Table 3

Threshold values obtained by the four methods.

Test images		DPSO	HDE	FA	IFA
Lena	2	87, 146	87, 146	87, 146	87, 146
	3	76, 122, 166	76, 122, 166	76, 122, 166	76, 122, 166
	4	72, 111, 142, 177	72, 111, 142, 177	72, 111, 142, 177	72, 111, 142, 177
	5	61, 88, 115, 142, 177	60, 87, 113, 143, 177	60, 88, 115, 142, 176	61, 88, 115, 142, 177
Cameraman	2	69, 143	69, 143	69, 143	69, 143
	3	58, 118, 155	58, 118, 155	58, 118, 155	58, 118, 155
	4	41, 93, 138, 168	41, 94, 139, 169	41, 94, 139, 169	41, 94, 139, 169
	5	34, 81, 121, 148, 172	33, 79, 119, 147, 171	35, 81, 121, 148, 172	35, 81, 121, 148, 172
Baboon	2	72, 126	72, 126	72, 126	72, 126
	3	55, 92, 133	55, 92, 133	55, 92, 134	55, 92, 133
	4	46, 80, 109, 142	45, 77, 108, 141	46, 79, 109, 142	46, 80, 109, 142
	5	45, 77, 105, 132, 156	44, 75, 102, 127, 155	46, 77, 105, 131, 157	46, 77, 105, 132, 157
Peppers	2	67, 134	67, 134	67, 134	67, 134
	3	62, 118, 165	61, 117, 165	62, 118, 165	62, 118, 165
	4	46, 85, 125, 168	46, 85, 125, 168	46, 85, 125, 168	46, 85, 125, 168
	5	42, 78, 112, 145, 176	42, 78, 112, 145, 177	42, 78, 112, 145, 176	42, 78, 112, 145, 176
QFN1	2	113, 209	113, 209	113, 209	113, 209
	3	80, 145, 220	80, 145, 220	80, 145, 220	80, 145, 220
	4	70, 114, 172, 227	70, 114, 172, 227	70, 114, 172, 227	70, 114, 172, 227
	5	62, 88, 132, 182, 230	63, 91, 136, 186, 231	62, 88, 132, 183, 230	62, 88, 132, 182, 230
QFN2	2	91, 193	91, 193	91, 193	91, 193
	3	68, 133, 215	68, 133, 215	68, 133, 215	68, 133, 215
	4	60, 103, 168, 229	60, 103, 168, 229	60, 103, 168, 229	60, 103, 168, 229
	5	53, 79, 123, 180, 222	54, 80, 124, 181, 232	54, 81, 125, 182, 233	54, 81, 125, 182, 233
QFN3	2	98, 198	98, 198	98, 198	98, 198
	3	72, 133, 212	72, 133, 212	72, 133, 212	72, 133, 212
	4	64, 107, 165, 225	64, 107, 165, 224	64, 107, 165, 225	64, 107, 165, 225
	5	57, 86, 128, 179, 229	58, 86, 129, 180, 230	58, 86, 129, 180, 230	58, 86, 129, 180, 230