The flexibility of friction ridge skin means that no two finger or palm prints are ever exactly alike in every detail even two impressions recorded immediately after each other from the same hand may be slightly different. A fingerprint created by the friction ridge structure.Fingerprint identification, known as dactyloscopy, or hand print identification, is the process of comparing two instances of friction ridge skin impressions (see ), from human fingers or toes, or even the palm of the hand or sole of the foot, to determine whether these impressions could have come from the same individual. Lastly, the numbers in the numerator and denominator are added up, using the scheme:(Ri + Rr + Lt + Lm + Lp)/(Rt + Rm + Rp + Li + Lr)A 1 is added to both top and bottom, to exclude any possibility of division by zero.įor example, if the right ring finger and the left index finger have whorls, the fraction used is:0/0 + 8/0 + 0/0 + 0/2 + 0/0 + 1/1The resulting is:(0 + 8 + 0 + 0 + 0 + 1)/(0 + 0 + 0 + 2 + 0 + 1) = 9/3 = 3 Dactyloscopy. Arches and loops are assigned values of 0. A whorl in the first fraction is given a 16, the second an 8, the third a 4, the fourth a 2, and 0 to the last fraction. The fractions are as follows:Ri/Rt + Rr/Rm + Lt/Rp + Lm/Li + Lp/LrThe numbers assigned to each print are based on whether or not they are whorls. It consists of five, in which R stands for right, L for left, i for index finger, m for middle finger, t for thumb, r for ring finger and p(pinky) for little finger. Whorls may also have sub-group classifications including plain whorls, accidental whorls, double loop whorls, peacock's eye, composite, and central pocket loop whorls.The system used by most experts, although complex, is similar to the Henry Classification System. Radial loops start on the thumb-side of the finger, the side closer to the.
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