Eye recognition three brothers eye pattern, iris, eye tracking
The eyes are the windows of the soul, but today, with the advancement of science and technology, the eyes are not only the "windows" but also the "identity cards" and "keys" of each of us. The accuracy of the information contained in both eyes is even stronger than the fingerprint recognition recognized by the public. Fingerprints will disappear or change with wear, but the chances of eye damage and wear are much smaller. At present, the eye recognition technology can be divided into three types: eye pattern, iris and eyeball. Although it is the eye recognition, what is the difference? How big is the difference? Today, Xiaobian will take you to identify the relationship and get to know this "three brothers of eye recognition."
Eye pattern recognition small blood vessel recognition true body
Eye pattern recognition relies on the unique distribution of white blood vessels in the human body to achieve accurate recognition. In the eye pattern recognition, the user's eye pattern needs to be collected and compared in two parts. The acquisition part uses a living body detection algorithm and an image enhancement algorithm, wherein the living body detection technique needs to ensure that the collected eye pattern comes from a living body, rather than a fake eye pattern such as a photo, a video or a mask.
Although the eye mark recognition is extremely accurate, it is not as widely used as face recognition technology because of its high technical difficulty. How to extract the fine blood vessel distribution details from the image taken by a common camera; how to extract the specific biological characteristics of each person from the white blood vessel arrangement; how to deal with the interference factors such as eyeball reflection, blinking, eyelashes, etc. Still able to identify stably, these are the current research and development challenges.
Iris recognition security level high application wide
Before introducing iris recognition, we should first know that the iris is the ring around our pupil. Asian irises are more common in brown, black, etc., Europeans and Americans can see different shades of blue, green and so on. Iris recognition differs from eye pattern recognition and eye tracking in the study of white eyes, while focusing on the identification of the outer ring portion of the pupil. It uses an input instrument to scan our eyes to obtain iris information from the human eye and to create an iris database dedicated to the iris. The iris information generated by our eyes is unique and has grown to a sufficient size eight months after birth and no longer changes during the stationary phase. It means that as people get older, people's fatness, sound, etc. will change, and the iris will not change. Not only that, wearing glasses, contact lenses, and enamel have little effect on iris recognition. Therefore, due to the high degree of uniqueness, stability and unchangeable characteristics of the iris, the iris can be used as a material basis for identification. Iris recognition is thus considered to be one of the safest biometric technologies in the world.
Some people may ask: Who is safer for these two eye recognition systems? From a safety level perspective, the iris is safer because it is more accurate than the eye pattern. However, the information authentication of iris and eye pattern recognition is safe enough in ordinary security applications. It can distinguish the difference between human eyes and human eyes in photos and videos. The eyes and eyes in photos and videos cannot be unlocked by both. .
Eye tracking AR / VR is a good helper
In addition to eye mark recognition and iris recognition, eye tracking is also one of the eye recognition technologies. This technology uses a device such as a camera to track eye movements and record the user's viewing position. Eye tracking technology is not an emerging technology, but the earliest technology was widely used in scientific research and market data collection, including early childhood autism detection, psychology, sports training and other specific applications. The fine muscles of the eye movement are immune to fatigue, and the eye gaze (the so-called "saccades") is one of the fastest movements in the human body. The eye can move 0.9 degrees / millisecond, so the response speed of the eye tracking technology Soon, tracking is accurate and will not cause fatigue. Such an interaction can promote technological breakthroughs in the field of human-computer interaction, and the degree of adaptation with AR/VR products is relatively high, providing extraordinary for AR / VR developers. opportunity.
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