Touchless Fingerprint Biometrics

Preface

Biometric systems recognize individuals by analyzing biological or behavioral

characteristics, called biometric traits. These systems are widely used in security

scenarios, and their diffusion is constantly increasing in governmental, industrial,

and consumer applications. The most accurate biometric technologies (e.g., touch-

based fingerprint recognition systems and iris-based systems) require a high level of

user cooperation to acquire samples of the considered biometric trait.

Touchless fingerprint recognition is a recent set of techniques designed to reduce

the acquisition constraints of those biometric technologies, while featuring high