I look into your eyes...
With biometric identification via the eyes, a distinction is made between iris recognition and recognition of the back of the eye (retina).
- In iris recognition, a high-resolution camera records the colour pattern of the iris and evaluates it according to certain features (dots, speckles, stripes, threads). For the detection, one only has to look into a camera, which ensures a high acceptance.
- In retina recognition, the background of a person's eye is detected with the help of infrared light. For this purpose, the head must be brought into a certain position in relation to the detection device.
Iris recognition is relatively easy to perform. The person is recorded with a high-resolution camera and the iris is evaluated by a system. The procedure is relatively simple and straightforward. The effort required for retina recognition is much higher. The correct distance to the camera, dirty lenses, light reflections from the surroundings or the pupil size have a significant influence on the recognition process. Although this method is extremely reliable, retina detection is currently only used in high-security facilities due to low user acceptance and high costs.