Back Identificación biométrica da retina Galician 網膜スキャン Japanese Сканирование сетчатки глаза Russian آنکھ کا اسکین Urdu
A retinal scan is a biometric technique that uses unique patterns on a person's retina blood vessels. It is not to be confused with other ocular-based technologies: iris recognition, commonly called an "iris scan", and eye vein verification that uses scleral veins.
The human retina is a thin tissue made up of neural cells that is located in the posterior portion of the eye. Because of the complex structure of the capillaries that supply the retina with blood, each person's retina is unique, making retinal scans an emerging authentication method.[1] The network of blood vessels in the retina is not entirely genetically determined and thus even identical twins do not share a similar pattern.
Although retinal patterns may be altered in cases of diabetes, glaucoma or retinal degenerative disorders, the retina typically remains unchanged from birth until death. Due to its unique and unchanging nature, the retina appears to be the most precise and reliable biometric, aside from DNA.[2] The National Center for State Courts estimate that retinal scanning has an error rate of one in ten million.[3]
A retinal scan is performed by casting an unperceived beam of low-energy infrared light into a person’s eye as they look through the scanner's eyepiece. This beam of light traces a standardized path on the retina. Because retinal blood vessels absorb light more readily than the surrounding tissue, the amount of reflection varies during the scan. The pattern of variations is digitized and stored in a database.[4]
- ^ Vora, Rita A.; Bharadi, V A; Kekre, H B (Oct 2012). "Retinal scan recognition using wavelet energy entropy". 2012 International Conference on Communication, Information & Computing Technology (ICCICT). IEEE. pp. 1–6. doi:10.1109/iccict.2012.6398120. ISBN 978-1-4577-2078-9. S2CID 17203983.
- ^ Retina and Iris Scans. Encyclopedia of Espionage, Intelligence, and Security. Copyright © 2004 by The Gale Group, Inc.
- ^ Cofta, Piotr; Furnell, Steven (2008). "Use of Biometric Data". Understanding Public Perceptions: Trust and Engagement in ICT-mediated Services. International Engineering Consortium. p. 153. ISBN 9781931695954. Retrieved 29 September 2014.
The error rate for fingerprint identification can be as high as 1 in 500, whereas a retinal scan boasts an error rate of 1 in 10,000,000.
- ^ Retinography: How Retinal Scanning Works. Retrieved on 2007-04-02.