Zodiac Link
Page 28 of 32
Operator Guide
June 2012 • Rev. 1.2
The Zodiac Link fingerprint matching algorithm is capable of extracting the
correct minutiae even without benefit of a perfect print. However, the
positioning of the finger and the relative wetness or dryness of the fingerprint
when it is placed on the optic window for scanning are both important
factors in getting a match.
CORRECTING WET/DRY FINGERPRINT IMAGES
When the temperature is low, or just after handwashing, the fingerprint is
often dry. In this case, the user may moisturize their fingerprint simply by
breathing on it before applying it to the optic window. If the fingerprint is
too wet, the ridges and valleys are rendered indistinguishable. The lack of
minutiae data causes wet fingerprints to be rejected. This can be remedied
simply by swiping the fingerprint on a clean towel or cloth.