State-of-the-art information regarding the advances in biometrics has been elucidated in this all-inclusive book. Over the past few years, biometrics has evolved to acquire the position of an underlying technique in diverse applications. In order to achieve greater progress and development, it is vital to identify the ignored challenges of past and the potential problems of future. With latest advancements, newer trends and developments are being identified, so as to distinguish among various biometric traits. This book aims at acquainting the reader about the dynamically changing scenario in the field of biometrics. Various topics, such as recognition based on face thermo pattern, finger-vein, structure of the hand, and performance evaluation reflect both aspects and development in the field of biometrics. Diverse facets of biometrics have also been covered to provide a holistic view on the field of biometrics. The aim of this book is to serve as a helpful guide for students, experts and researchers.