A Comparison between Quaternion Euclidean Product Distance and Cauchy Schwartz Inequality Distance - Advances in Computational Science and Engineering - page 134

The distribution of inner−class and outer−class QEPD
inner−class QEPD
outer−class QEPD

0.12

0.1

0.08

0.06

0.04

0.02

0

0 0.2 0.4 0.6 0.8 1

(a)

The distribution of inner−class and outer−class QEPD
inner−class QEPD
outer−class QEPD

0.14

0.12

0.1

0.08

0.06

0.04

0.02

0

0 0.2 0.4 0.6 0.8 1

(b)

The distribution of inner−class and outer−class CSID
inner−class CSID
outer−class CSID

0.12

0.1

0.08

0.06

0.04

0.02

0

0 0.2 0.4 0.6 0.8 1

(c)

The distribution of inner−class and out−class CSID
inner−class CSID
outer−class CSID

0.07

0.06

0.05

0.04

0.03

0.02

0.01

0

0 0.2 0.4 0.6 0.8 1

(d)
Fig. 3. (a) The distribution of palmprint inner-class and outer-class QEPD (b) the dis-
tribution of middle finger texture inner-class and outer-class QEPD (c) the distribution
of palmprint inner-class and outer-class CSID and (d) the distribution of middle finger
texture inner-class and outer-class CSID