In 1987, two ophthalmologists (Aran Safir and Leonard Flom) and university (John Daugman) have developed a method for identification based on iris. Patented in 1994, this method therefore arrives after reading the retina. Unlike the retina, iris is visible from the outside. Colored membrane between the white of the eye and the pupil, the iris is composed of a multitude of very fine tubes that intersect, providing iris particular and unique shape that varies very little over of a lifetime.


How it works?

Capturing the iris is made using a camera that will initially position the iris relative to the entire eye. Then, the camera scans the image of the iris to analyze the characteristic points. The analysis device including the position, length and the relief of the tubes which compose the iris. Finally, by accepting over 200 distinctive points, the camera connected to computer will perform the comparison of the iris with the data bank of possible identifiers. The identification process takes only a few seconds, and to specify that the analyzed image is captured in black and white.

The color of the eye is thus not taken into account in the analysis, which cancels the bias caused by the changes in color of the iris in some people.  Also, while the method examines the visible part of the eye, some cases of fraudsters using iris photographs to foil the camera were identified. To curb the problem, it is now widespread in the market as the iris-scan devices are lined with a function to authenticate the validity of a human eye. Thus, in addition to the iris scanner, the camera outputs a light and analyzes the reaction of expansion and retraction of the pupil.


What are the strong points?

Just like fingerprint and retina, the iris biometric is a popular method for its uniqueness and high reliability. It is therefore not possible for identical twins have identical iris. Similarly, the same individual will have a different left iris of law. With a stable iris texture over time, the risk of detecting two identical irises is tiny (1/10).  The sophistication of the method is also an advantage to consider. Some techniques currently available on the market shall identify within 4 seconds. The iris scan is also favored by some because it is achievable despite wearing lenses or glasses.


What are the weak points?

Along with the retina-scan the iris recognition is a method that requires trained and cooperative subjects. It may in this sense be difficult for a user to remain still during the scan. Since the proportional decrease in the reliability depending on the distance, the subject must remain very close to the camera. Also, the light sent into the eye can be very unpleasant.

Like many of biometrics, capturing the iris is considered intrusive by some people. The dipositive is also a disadvantage. Compared to the identification by fingerprint, the eye image sensor is larger and therefore inadequate for the safety of small objects. It is also more expensive.


What are the uses or “Iris Scanner?”

  • Worldwide, the technical identification by the iris is mostly exploited in the border area.
  • Since 2003, Canada has adopted such a method in order to facilitate customs control for users who frequently make the trip from the United States.On a voluntary basis, this type of traveler must first save the image of the iris, which is then left on a card as a code. When passing through customs, the user must authenticate with the iris code.
  • Australia is also working to establish such a system of identification for its borders.
  • Also in 2003, the High Commissioner for Refugees has used the iris recognition for Afghans to distribute its food aid coupons.
  • In the US, we find a few banks and prisons that are equipped with such a system.
  • Interestingly, biometrics iris is very present in Asian countries, but virtually absent in Europe.This is explained by the US patent filed in 1994 by the creators of the process.

 Is “Iris Scanner” new to you? 

The Iris Scan is a technology that has existed for 90 years, although the idea of identifying people by the pattern of the iris back to the early twentieth century. Today we can see the technology in security checks of certain UK airports and even smartphones. The last to be included is the Samsung Galaxy Note 7.


How does an iris ‘scan’? 

The principle of this technology, summarizing maximum is basically converting the map of the iris in one or several numbers. The iris is the colored area around the pupil, the black part that lets light into the eye. With this card, it is possible to calculate the polar coordinates of each irregularity and convert them in concentric circles, whose center coordinates of the pupil. The coordinates of each irregularity are unique for each person.

  • The scanner creates a map of the iris of the eye

To convert this if colored part of the eye in a card, a specific tone is defined.

  • A scanner that has great potential

Recognition iris scan is about 10 times more secure than fingerprint scanner. As we have read recently, fingerprints are easily copied, but on the iris of the eye is more complicated, hence the greater security.

  • EyeVerify was not very effective.

Before the iris scanners, some devices using a release system based on EyeVerify. It is not a scanner. This technology is based on facial recognition, at the area where the eyes are located, and for measuring the distance between the eyes and eyebrow position. A good example is EyeVerify device using the Idol 3 , although this system was not very effective, and light years of the scanner Note 7.

Note 7 “Iris Scanner” worth offering?

We begin to learn a little about the future PHABLET Samsung Note 7. A logo presented as the official, also confirmed the presence of a scanner of the iris. This biometric system will provide an additional layer of protection for the user.

The Galaxy Note 7 should offer a Super AMOLED 5.8 inch qHD curved on the sides of the unit.  We also find there a 12-megapixel camera on the back and 5-megapixel front, 6GB of RAM, a microSD slot, a battery with a capacity of 4000 mAh, all in a waterproof case. In the Note 7, iris scanner seems to work pretty well and quickly. Just press the power button to put its eyes in the circles that appear on the screen, and the device is unlocked. In short, with the Note 7, you only have to look at your phone to unlock.