Fingerprint patterns


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This is a slideshow for basic fingerprint pattern recognition

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Fingerprint patterns

  1. 1. Fingerprint Patterns
  2. 2. Fingerprint types  While fingerprints are unique to each individual, there are three general categories that fingerprints can be placed into.  Loop: 60-65% of the population  Whorl: 30-35% of the population  Arch: up to 5% of the population  All categories are determined by the number of deltas found within the pattern.
  3. 3. About the patterns  Any fingerprint pattern which contains 2 or more delta's will be a whorl pattern.  If a print contains no delta's then it is an arch pattern.  If it contains one (and only one) delta it will be a loop pattern. Later you will learn that the names are not as strait forward as the rules suggest
  4. 4. General Loop Pattern Right Loop starts from the rightLeft Loop starts from the Left Just One Delta
  5. 5. General Whorl Pattern Whorls will always have at least 2 valid Deltas located within the print
  6. 6. General Arch Pattern Arch patterns will have no Deltas
  7. 7. Composite Patterns  Within the general categories, there are several different types of each print based on some major or minor differences
  8. 8. Tented Arch patterns are steeper than general arch patterns General Arch Tented Arch
  9. 9. Double Loop Patterns look very different from left or right loops and have 2 deltas Technically this is a double loop whorl
  10. 10. Central Loops/Pocket Loops look similar to whorl patterns but obviously have a loop from the left or right Right Pocket Loop Left Pocket Loop These are technically Left or Right Central Pocket Loop Whorls
  11. 11. Accidental patterns look like an Arch pattern and a loop pattern mixed together. It is also known as a mixed figure If a pattern does contain more than 2 delta's it will always be an accidental whorl pattern.
  12. 12. Assignment  Get a piece of white paper and put all the prints from each hand on the paper.  Above each print you need to label the type of print that each finger is.  For your right hand, find and label three points (fork, delta, etc.) within each fingerprint
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