Fingerprint attendance machine by machine fingerprint sensor fingerprint attendance personnel collected, is essentially the process of fingerprint fingerprint imaging process. Its principle is based on the geometry of the ridge and Valley characteristics, physical and biological characteristics of different to get different feedback signals, painted according to the amount of feedback signal values fingerprint images.
Fingerprint comparison is "fingerprinting" fingerprint sensor fingerprint later compare the fingerprints collected and stored, can be foolproof, because of early 19th century scientific research has discovered the uniqueness of each fingerprint;
3, record data
After determine the identity of persons, and record the time, date, formed by software processing attendance data reports;
4, print data
This last step is optional (because the machines can be found in the recorded results), if necessary through the printer printed already deal with the report data.