This book offers the first comprehensive analysis of touchless fingerprint-recognition technologies. It gives an overview of the state of the art, describes relevant industrial applications, and presents new techniques to efficiently and effectively implement advanced solutions based on touchless fingerprint biometrics. It considers current problems in developing high-accuracy touchless recognition technology and recommends future work that can be done to address them. A state-of-the-art presentation of the field, it demonstrates that applying touchless technologies to biometric recognition systems shows particular promise.