A brief study on evolution of iris recognition system

Biometrics are beneficial to keep the information of a person secured in our daily life. The various biometrics like face recognition, iris recognition, vein recognition, lips patterns and finger prints have become robust features in research world. Among all difference types of biometrics, Iris Recognition is one of the great importance because it has extraordinary variation in texture. A hypersensitive layer that regulates the size of pupil controls the extent of light that enters the eye. It is different for unrelated persons, even identical twins and left and right irises of some person are different to each other. In this paper we have studied various methods used in iris recognition.