Showing posts with label fingerprints. Show all posts
Showing posts with label fingerprints. Show all posts

Police to Identify People by Nose Shape

Police are upgrading detective work from fingerprints to "nose prints". It seems we all have different noses, so we can be identified by surveillance cameras. While fingerprints and iris scans are being used for "signing in" and entry to premises, work on identification by nose shape is being ramped up. A lot has been done on ear shape, which also differs quite markedly from person to person.

People tend to cover everything but their noses when they are up to no good. Another thing is, if a suspect does not cooperate he/she can be identified by the shape of their nose.

Plastic surgeon Dr Peter Callan says some noses are easy in determining a person's identity. For example, there is the classic Roman nose, Greek nose, turned-up, snub and hawk nose. Cameras that film in 3D give a very accurate picture of nose shape. However, to take a picture this way a person has to be moving quite slowly. It would be okay for prisoners. For general camera surveillance, when a person walks briskly at airports and train stations, only a basic shot can be taken.

It seems pinning a person down by nose shape will remain a backup system. It certainly does have its uses. Iris, face recognition and finger printing will still be the main ways of identifying a possible felon.  There is a problem with fingerprints.  A US citizen was recently arrested for a crime in the Middle East when a computer made a positive match.  However, the real perpetrator was caught and had a fingerprint virtually identical to the American man.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Society by Ty Buchanan
     Australian Blog                         
ALL BLOG ARTICLES· ──► (BLOG HOME PAGE)

No Scales on a Crocodile's Head

Contrary to popular belief crocodiles don't have scales on their heads. They are just cracks in the thick skin on their skulls. The rest of the body does have scales. How the animal develops biologically is interesting. Each scale forms from a discrete scale primordium. For example, scales at similar points each side of the body are identical.

The deep lines on the head are unique to each crocodile, like a fingerprint. Indeed, the lines are not symmetrical. Now it is possible to identify young crocodiles without tagging, to follow their growth.

Having no primordia on a crocodile's head is functional. Mounds of skin build up and form an active memrocobrane. Receptors detect fine vibrations in water. This helps in hunting.

It has been hypothesised that fingerprints form in the same way as the "cracks" on the heads of crocodiles. This unregulated gene formation building on earlier skin development is probably the reason why identical twins have different fingerprints. The final shape of all creatures was believed to be totally preprogrammed by genes.
. . . . . . . . . . . . . . . . . . . .
Genetics
TwitThis