Fig. 1.

Illustrations of the optimization process of the proposed UFIBRE algorithm with a simple 2-D example. (a) Template fibers with known bundle classification. (b) Target fibers with unknown bundle classification. The target fibers (cyan), ${\mathit{\mu }}_{\mathit{b}/\mathit{y}}^n$ (blue), ${\mathit{\mu }}_{\mathit{r}/\mathit{y}}^n$ (red), and ${\mathit{\mu }}_{\mathit{y}}^n$ (green) at 0th (c), first (d), fifth (e), 12th (f), 15th (g), and 20th (h) iteration, respectively.