A Novel Plant Root Foraging Algorithm for Image Segmentation Problems

Table 4

Objective values and thresholds by the Otsu method.

Image	𝑀−1=2		𝑀−1=3		𝑀−1=4
	Objective values	Optimal thresholds	Objective values	Optimal thresholds	Objective values	Optimal thresholds
Avion	4.11𝐸+04	114, 175	4.35𝐸+04	95, 151, 192	3.91𝐸+04	85, 131, 172, 208
House	3.04𝐸+04	109, 175	3.15𝐸+04	87, 136, 183	2.69𝐸+04	76, 121, 155, 191
Lena	1.77𝐸+04	95, 156	2.11𝐸+04	84, 123, 175	1.96𝐸+04	76, 121, 155, 191
Hunter	1.12𝐸+04	53, 118	1.13𝐸+04	37, 88, 144	1.07𝐸+04	33, 76, 121, 156
Mean CPU time	3.99𝐸+00		8.69𝐸+01		2.42𝐸+03