A Digital Camera-Based Rotation-Invariant Fingerprint Verification Method

Figure 4

Stages of rotation alignment method applied to four images: (a–d) input intensity image, (e–h) segmented input image, (i–l) matched features including outliers, (m–p) matched inliers, and (q–t) derotated input image.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

(j)

(k)

(l)

(m)

(n)

(o)

(p)

(q)

(r)

(s)

(t)