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What's the process of iris recognition? 2022-05-26 16:16:29

What's the process of iris recognition?


Iris recognition is to determine people's identity through the similarity between iris image features. Iris recognition technology is generally divided into the following four steps:


1. Capture of iris images

The entire eye of the human body is photographed with a special camera for the iris, and the photographed image is transmitted to the image preprocessing software of the iris recognition system, that is, the iris algorithm system.

2. Iris algorithm system

Process the captured iris image to meet the needs of extracting iris features
1) Iris localization: Determine the position of the inner circle, outer circle and quadratic curve in the image. The inner circle is the boundary between the iris and the pupil, and the outer circle is the boundary between the iris and the sclera. The quadratic curve refers to the boundary between the iris and the upper and lower eyelids.
2) Normalization of iris image: Adjust the size of the iris in the image to the appropriate size of the iris algorithm software

3) Image enhancement: For the normalized image, the brightness, contrast and smoothness are processed to improve the recognition rate of the iris in the image


Binocular iris recognition module

Dynamic binocular iris recognition scanner

Iris recognition philosophy
3. Eigenvalue capture
Use a specific algorithm to grab the feature points needed for iris recognition from the iris image and encode them

4. Feature matching

The feature codes obtained by feature extraction are matched with the iris image feature codes in the database one by one to determine whether it is the same iris, so as to achieve the purpose of identification.



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