Table 3: Finger posture and the respective distance criteria.
Symbol fpost(n)=0 (not raised) fpost(n)=1 (fully raised) fpost(n)=2 (half-raised)
n=0 (thumb) dtc ≤ kth-raised dtc > kth-raised -
n=1 (index) dtc ≤ kbent dtc > kraised kbent < dtc≤ kraised
n=2 (middle) dtc ≤ kbent dtc > kraised kbent < dtc≤ kraised
n=3 (ring) dtc ≤ kbent dtc > kraised kbent < dtc≤ kraised
n=4 (pinky) dtc ≤ kpi-raised dtc > kpi-raised -