A PSO-Powell Hybrid Method to Extract Fiber Orientations from ODF

Table 3

Convergence time of extracting fiber orientation from two-fiber ODF.

Two-fiber ODF	Ball-stick	Modified Powell; QBI/CSA-QBI/DOT	Diffusion decomposition; QBI/CSA-QBI/DOT	PSO-Powell; QBI/CSA-QBI/DOT
Noise-free	1.12 s	81.42 s/80.39 s/90.15 s	88.81 s/90.15 s/87.78 s	43.45 s/42.97 s/41.35 s
	1.17 s	87.15 s/81.76 s/92.80 s	93.90 s/93.43 s/90.27 s	45.96 s/44.77 s/45.28 s