Introduction of Iris Recognition
The iris of a human eye is the annular part between the black pupil and white sclera. It is located behind the cornea to control the size of the pupil and regulates the amount of light entering the eye. The iris is the only internal organ externally visible. The diameter of iris is only 12 mm but it has a highly complex structure.
Under infrared illumination, iris displays rich texture determined by many distinctive minutes (e.g. furrows, rings, scripts, etc., see Fig.2). Such iris texture is commonly thought to be highly discriminative between eyes and stable over individuals?lifetime, which makes iris particularly useful for personal identification.