683045.fig.0010a
(a)
683045.fig.0010b
(b)
683045.fig.0010c
(c)
Figure 10: Angle calculation using three sequential points of the hand’s outline edge. (a) Obtaining angle in a normal case. (b) Obtaining the opposite angle in error case. (c) Compensating error case (: calculated angle of three points at the intervals of five adjacent edge points).