1. Enhancing Latent Fingerprints
Gesler, R.J.

2. Road Map Past Present Future How have we worked with fingerprints?
How are we working with fingerprints?
Future
How will we work with fingerprints?

3. Anatomy of a Fingerprint
There are five main types of patterns
Minutia or the plural minutiae
Reoccurring features that can be sorted, yet so unique that even identical twins with the same DNA possess individually identifiable fingerprints

4. Recorded Fingerprints
Inked or Scanned
IAFIS database
Latent fingerprints
Crime scene evidence

5. Manually Marked Fingerprints
Latent is rolled and photographed
Manually marked minutiae
Some current systems are flawed

6. Proposed Algorithm Build a dictionary using reference fingerprints
A fingerprint is like a sentence with words and letters
Correct the spelling of the sentence to enhance the latent fingerprint

7. Proposed Algorithm Square patches are created The patches overlap
The patches have variable resolution
3x3 pixel
5x5 pixel
7x7 pixel
9x9 pixel
11x11 pixel

8. Impossible Patterns

9. Proposed System Flow Chart

10. One Set of Patches

11. Dictionary Lookup
Original patches ranked on similarity and one is chosen
Neighboring patches compared at 80% tolerance and repeated
92%
69%

12. Current Results

13. Current Results

14. Narrowing the Gap Manual versus proposed algorithm
Regional overlap Complete overlap

15. Refining Searches
Type specific dictionary

16. References
FBI. Fingerprints & Other Biometrics. Feng, J., Zhou, J., & Jain, A. K. (2013). Orientation Field Estimation for Latent Fingerprint Enhancement. IEEE Transactions On Pattern Analysis & Machine Intelligence, 35(4), doi: /TPAMI I heart Dr. Smith