What is the fingerprint reader?
Fingerprint reader is a biometric tool used to verify human identity. These devices generally work by scanning the user's fingerprint, creating a digital image and comparing the live printing functions with the stored copies. Fingerprint readers are used to enforce the right, access and secure the computer. Different technologies used in fingerprint readings offer different strengths and weaknesses for identity verification.
Human fingerprints have a number of identifiable functions that can be used for comparison. Ridges on fingerprints usually form one of three different patterns. The arches are combs that enter the finger from one side, rise in the middle and climb the finger on the other side. The loops include the ridges entering the finger, the loops around and protruding on the same side. Whorls are sets of ridges that form concentric circles.
The individual combs can also display identifiable functions called Minimumiae. The end of the ridge is a ceEbeny, which sudden endless without touching adjacent ridges. Bifurcation is when the ridge is divided into two. A short ridge because the dot is a comb with a very short length. The number of possible combinations of fingerprint elements is very large and no two fingerprints have been proven.
Fingerprint reader uses to measure the fingerprint in question. Optical sensors record visible light as well as a digital camera. This type of fingerprint reader usually has a specialized touch surface that equals the curved shape of the finger. Optical sensors require that the touch surface and finger of the user be clean to create a useful image. This type of fingerprint reader can also sometimes be deceived by a picture of the fingerprint instead of the actual user printing.
ultrasonic sensors are another type of sensor used in fingerprint readers. Reflects the high -frequency sound of the dermal layer of the finger, andwould create a picture. The dermal leather layer shows the same pattern of fingerprints as the surface of the outer leather, so that ultrasonic sensors do not require clean touch or finger surfaces.
Once the fingerprint data is collected by a sensor, they are stored on a computer in the image file. The algorithm is generally used with a fingerprint reader to automatically recognize the patterns of the ridge and the details. To do this, the algorithm must first align the candidate and the stored picture in the same orientation. It can then measure the relationships between features in fingerprints, such as the number of ridges between the selected minutes. In addition to algorithmic comparison techniques, the staff may be invited to visually check ambiguous images of fingerprints for a different level of verification.