[Retracted] Efficient COVID-19 CT Scan Image Segmentation by Automatic Clustering Algorithm

Table 4

Best threshold values of various segmentation methods.

Image	IWOA	WOA	SSA	SCA
SImg 1	35,50,66	25,36,227	75,192,242	70,188,234
SImg 2	124,139,198	8,27,36	22,68,254	45,133,194
SImg 3	55,143,218	31,52,121	57,94,254	65,143,213
SImg 4	20,133,238	102,109,133	18,50,254	39,156,211
SImg 5	31,235,244	40,114,164	31,58,174	45,174,198
SImg 6	18,35,179	137,162,253	65,200,234	56,124,189
SImg 7	60,205,249	85,152,249	67,110,254	70,137,221
SImg 8	81,171,249	135,184,208	61,185,242	58,134,197
SImg 9	30,125,224	17,170,181	12,34,143	60,124,168
SImg 10	3,21,92	8,33,204	4,27,154	10,65,188
SImg 11	122,224,246	101,178,186	10,183,234	39,126,254
SImg 12	143,151,214	118,138,211	44,113,194	10,138,214
SImg 13	122,143,252	141,216,249	4,81,201	25,127,214
SImg 14	116,135,196	104,200,216	4,78,157	42,59,187
SImg 15	148,168,234	172,182,231	26,153,179	47,145,254