The Palm based systems take the image of the palm from various angles and compare the same. The other biometric systems are based on ‘Retina of the eye’, Palm, photograph or voice pattern recognition. Most systems allow for dry, greasy, chaffed and minor cuts on the fingers. When a Finger print is to be matched, it’s ‘template’ number is computed and compared with that stored in the database. Such an approach is desirable so that unauthorized persons may not sneak in unauthorized images of finger print in the database. A template is basically a number that is calculated based on various characteristics of the fingerprint. Most of the Biometric Systems do not keep an image of the fingerprint but a template. The system then compares the finger print that is read with that in the central database for authentication. Users are supposed to put their thumb/index finger (or any specified finger) in the finger reader. The most common, reliable and successful system is the one based on Finger Prints. Because every person’s fingerprint, iris, voice, retina face, hand, vein and signature are unique, a biometric time clock provides a quick, accurate, and reliable way to record “In” and “Out” punches for each employee. Biometric Time Attendance Reader ensures that no employee can punch in for another, which eliminates time fraud and reduces payroll costs.
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