Improving Sensor Interoperability between Contactless and Contact-Based Fingerprints Using Pose Correction and Unwarping

Figure 5

Effect of the different unwarpings on a middle finger: (a) input; (b) elliptic; (c) bidirectional; (d) circular-adaptive; (e) circular-fixed.

(a)

(b)

(c)

(d)

(e)