Wednesday, December 18, 2013
Palm Vein Technology
Definition
An individual first rests his
wrist, and on some devices, the middle of his fingers, on the sensor's supports
such that the palm is held centimeters above the device's scanner, which
flashes a near-infrared ray on the palm. Unlike the skin, through which
near-infrared light passes, deoxygenated hemoglobin in the blood flowing
through the veins absorbs near-infrared rays, illuminating the hemoglobin,
causing it to be visible to the scanner. Arteries and capillaries, whose blood
contains oxygenated hemoglobin, which does not absorb near-infrared light, are
invisible to the sensor. The still image captured by the camera, which
photographs in the near-infrared range, appears as a black network, reflecting
the palm's vein pattern against the lighter background of the palm.
An individual's palm vein
image is converted by algorithms into data points, which is then compressed,
encrypted, and stored by the software and registered along with the other
details in his profile as a reference for future comparison. Then, each time a
person logs in attempting to gain access by a palm scan to a particular bank
account or secured entryway, etc., the newly captured image is likewise
processed and compared to the registered one or to the bank of stored files for
verification, all in a period of seconds. Numbers and positions of veins and
their crossing points are all compared and, depending on verification, the
person is either granted or denied access.
Contact less Palm Vein
Authentication Device:
The completely contactless
feature of this Device makes it suitable for use where high levels of hygiene
are required It also eliminates any hesitation people might have about coming
into contact with something that other people have already touched.
In addition to being
contactless and thereby hygienic and user-friendly in that the user does not
need to physically touch a surface and is free of such hygiene concerns, palm
vein authentication is highly secure in that the veins are internal to the body
and carry a wealth of information, thereby being extremely difficult to forge.
What happens if the
registered palm gets damaged?
There may be a chance that
the palm we had registered may get damaged then we cannot use this technology,
so during the time of registration we take the veins of both the hands so that
if one gets damaged we can access through the second hand. When hand get
damaged up to large extent we can get veins because deeper into the hand veins
are obtained. When we apply this method we can maintain complete privacy .
