Here's a quick history of how iris scanning technology has developed.
- 1936: US opthamologist Frank Burch suggests the idea of recognizing people from their iris patterns long before technology for doing so is feasible.
- 1981: American opthamologists Leonard Flom and Aran Safir discuss the idea of using iris recognition as a form of biometric security, though technology is still not yet advanced enough.
- 1987: Flom and Safir gain US patent #4,641,349 for the basic concept of an iris recognition system.
- 1994: US-born mathematician John Daugman (currently a professor of computer science at Cambridge University, England) works with Flom and Safir to develop the algorithms (mathematical processes) that can turn photographs of irises into unique numeric codes. He is granted US patent #5,291,560 for a "biometric personal identification system based on iris analysis" the same year. Daugman is widely credited as the inventor of practical iris recognition since his algorithm is used in most iris-scanning systems.
- 1996: Lancaster County Prison, Pennsylvania begins testing iris recognition as a way of checking prisoner identities.
- 1999: Bank United Corporation of Houston, Texas converts supermarket ATMs to iris-recognition technology.
- 2000: Charlotte/Douglas International Airport in North Carolina and Flughafen Frankfurt Airport in Germany become two of the first airports to use iris scanning in routine passenger checks.
- 2006: Iris-scanning systems are installed at British airports, including Heathrow, Gatwick, Birmingham, and Stansted. Privacy concerns notwithstanding, hundreds of thousands of travelers voluntarily opt to use the machines to avoid lengthy passport-checking queues.
reference:
<http://www.explainthatstuff.com/how-iris-scans-work.html>
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