What is the principle of iris recognition?

Principle: The structure of human eye is composed of sclera, iris, pupil lens and retina. Iris is an annular part between the black pupil and the white sclera, which contains many detailed features, such as spots, filaments, crowns, stripes and depressions.

Moreover, after the iris is formed in the fetal development stage, it will remain unchanged throughout the life. These characteristics determine the uniqueness of iris features and identity recognition. Therefore, the iris feature of eyes can be used as the recognition object of everyone.

Extended data

Advantages:

1, humanized;

2. It may be the most reliable biometric technology;

3. No physical contact is required;

4. High reliability.

Fast and convenient: using this system, access control can be realized without carrying any certificates, which can be one-way or two-way; Can be authorized to control a door, but also can control the opening of multiple doors;

Flexible authorization: the system can adjust the user authority at will according to the management needs, and grasp the user dynamics at any time, including customer identity, operation location, function, time sequence, etc., so as to realize real-time intelligent management;

Disadvantages:

1, the size of image acquisition equipment is difficult to be miniaturized;

2. The equipment cost is high, so it cannot be widely popularized;

3. The lens may produce image distortion, reducing reliability;

4. Two modules: hardware and software;

5. The automatic iris recognition system includes two modules: hardware and software: iris image acquisition equipment and iris recognition algorithm. Corresponding to two basic problems: image acquisition and pattern matching.

Baidu encyclopedia-iris recognition technology