How does hand geometry work?
When an employee is first enrolled in a hand-geometry-based biometric time and attendance system, the hand reader records a 3-D image of the hand. The image is stored as a templateassociated with that employee’s ID number. Each time the employee attempts to clock in or out, the hand reader verifies that the newly scanned hand image matches the template originally stored for that employee ID number. Ifthere is a match, the punch is recorded. The scanners used by Acroprint’s ATRx Biometric 1000 system are highly accurate, taking 90 different measurements of the hand. The scanners also update the template every time the employee’s hand is successfully scanned. This means that the system can accommodate changes such as natural aging, weight gain, weight loss and other normal variations in the hand geometry. Artificial fingernails and small adhesive bandages are not usually a problem. If worn consistently, jewelry such as wedding bands will likewise normally not affect the accuracy of the s
