A Novel Histogram Region Merging Based Multithreshold Segmentation Algorithm for MR Brain Images

Table 2

Runtime.

Images	Otsu	Fast Otsu	PSO Otsu	This paper
a	17.674 s	3.625 s	0.965 s	0.018 s
b	14.264 s	2.996 s	1.967 s	0.022 s
c	17.093 s	3.965 s	2.823 s	0.038 s
d	16.318 s	4.112 s	1.842 s	0.047 s