time and attendance systems Disadvantages
time and attendance systems Disadvantages: the cost is higher, has not yet to enter chinese people market. 8. All move machine should be the necessary quality time accurate, attendance data not easily disturbed lost or chaos (occasional unavoidably), communication while using computer stability. Second, the actual attendance software it seems that everyone is able to write check on work attendance software, if it is right for you to talk to your request. Easy to use, stable and also practical.6. biometric time Advantages: no need to card, remedy problems and punch. Problems: requirements personnel quality is great, fingerprint for cleaning, against the damage of ability and steadiness need to further improve the (at the moment at the beginning stage). 7. Eyesight rainbow roll machine The ideal roll machine. fingerprint time Advantage: make use of the eyes from the one feature to identify different people, related to the non-contact method to identify the options, identification speed is under 1 second. Disadvantages: the cost is high, has not however to enter the Chinese market. 8. All roll machine needs to be the necessary quality Time accurate, work data not easily disturbed lost or chaos (infrequent unavoidably), communication with the computer balance.
Magnetic fingerprint time clock Advantages: offered computer statistical attendance data. Faults: magnetic card and also head vulnerable (may have more reliable magnetic card products). Scope: health environment is a useful one, the personnel quality are generally high places (used to gain access to, Banks, etc.). 3. IC card roll machine And also magnetic card is roughly same, IC card outlet is vulnerable place. Four. Bar code roll machine And magnetic card use the same method. Advantages: photoelectric read bar code card number, low failure rate. Faults: card easily forged (special mask hair strands of barcode except), bar code dirty after reduced sensitivity and a wrong size pointed out.
Since computer processing fingerprint, just involved fingerprint some restricted information, and comparison algorithm is not precise matching, as well as the result will not guarantee 100% exact. biometric time clock the specific use of the important measure of mark can be recognition rate. Mainly includes two parts, refuse trustworthy straightforwardness (FRR) and deterrent rate (Much). We can according to the different Makes use of to adjust the two value. FRR Much and is inversely proportional. Use 0-1.0 or percentage to express this number.
Recognition is the field purchase to fingerprint with fingerprint data library of fingerprint by contrast in the time and attendance systems, find out and the fingerprint time clock. This is also called "one to many people matching (one - to - several matching)". Validation is really to answer such a question: "who can be he?" Identification mainly used in crime fingerprint corresponding in the field of traditional. An unknown person's fingerprints and finger print storehouse have criminal record folks compare fingerprints, to determine whether he had criminal record.
