Iris+Scanner

=Iris recognition=

Iris recognition is the process of recognizing a person by analyzing the random patter of their iris. the iris is a muscle within the eye that regulates the size of the pupil, controlling the amount of light that enters the eye. it is the colored portion of the eye with coloring based on the amount of melatonin pigment within the muscle.


 * altough the colouration and structure of the iris is genetically linked, the details of the patterns are not.
 * the iris develops during prenatal growth through a process of tight forming and folding of the tissue membrane. prior to birth, degeneration accurs, resulting in the pupil opening and the random, unique patterns of the iris.
 * altough genenetically identical, an individual's irides are unique and structurally distinct, which allows for it to be used for recognition purposes.

Approach:
before recognition of the iris takes place, the iris is located using landmark features. these landmark features and the district shape of the iris allow for imaging, features isolation and extraction. Locatization of the iris is an important step in iris recognition because, if done improperly, resultant noise (e.g., eyelashes, reflections, pupils, and eyelids) in the image may lead to poor performance.


 * iris imaging requires use of a high quality digital camera. today's commercial iris cameras typically use infrared light to illuminate the iris without causing harm or doscomfort to the subject.
 * upon imaging an iris, a 2D Gabor wabelet filters and maps the segments of the iris into phasors (vertors). these phasors include information on the orientation and spatial frequency ('what' of the image) and the position of thse areas ('where' of the image) the information is used to map the irisCodes.