Similar to biometric recognition techniques such as fingerprint, IRIS and face recognition, everyone's tongue print can be used for biometric recognition! http://www.springerlink.com/content/v13364721x643137/
While reading the above papers, I thought, How about lips? Then, I came across this paper. Though, I am not sure it is proved that every lip print is unique. http://www.springerlink.com/content/a0404h0860806285/
And then I thought, how about nose? Then I came across this paper which uses nose pores as biometric recognition system.
Check this for more details.
After reading about the above biometric recognition system, I was wondering… what has stopped researchers from exploring the biometric possibilities for other parts of human body. Just then, I came across this Wikipedia article which says…
“It is possible to understand if a human characteristic can be used for biometrics in terms of the following parameters:
- Universality – each person should have the characteristic.
- Uniqueness – is how well the biometric separates individuals from another.
- Permanence – measures how well a biometric resists aging and other variance over time.
- Collectability – ease of acquisition for measurement.
- Performance – accuracy, speed, and robustness of technology used.
- Acceptability – degree of approval of a technology.
- Circumvention – ease of use of a substitute”
Acceptability – Well, that might be the reason stopping researchers from some out-of-box ideas. My only regret is that, wish I knew pattern recognition algorithms…