what is fingerprint scanner? aryah.net

Fingerprint scanner is security systems of biometrics. They are now used in police stations, security industries and, most recently, on computers. Every person has marks on his or hers fingers. They cannot be removed or changed. These marks have a pattern and this pattern is called the fingerprint. Every fingerprint is special. A person’s genes create a fingerprint, which is different from anybody else. Fingerprints have become an ideal means of identification.Aryah.net

Types of scanner:

1. 1. Optical scanners

Optical scanners do not distinguish text from illustrations; they represent all images as bit maps. Therefore, you cannot directly edit text that has been scanned. Computer input device that uses a light beam to scan codes, text, or graphic images directly into a computer or computer system.

2. Capacitance scanner

Capacitance scanners make use of electrical current to form a fingerprint image. The sensor part of the capacitance scanner is made up of tiny plates that act as conductors. These conductors are then overlaid by an insulating film. These form the cells that make up the sensor’s semiconductor chip or chips. Capacitance scanners are better than optical scanners in detecting fake fingerprints since they depend on the resulting capacitance of the portions of the finger that are in contact with the sensor plus the air capacitance on the ridges of a finger instead of just relying on the amount of reflected light like what the optical scanners do