sormenjälkitunnuksen

Sormenjälkitunnus, often referred to as fingerprint identification or fingerprint scanning, is a biometric method of identification that relies on the unique patterns of ridges and furrows found on human fingertips. These patterns, formed during fetal development, are believed to be unique to each individual and remain unchanged throughout a person's life.

The process of sormenjälkitunnus typically involves capturing an image of a person's fingerprint. This can be done using various technologies, including optical scanners that use light to create a digital image, capacitive scanners that measure electrical capacitance between the ridges and valleys, or ultrasonic scanners that use sound waves. Once captured, the fingerprint image is analyzed to extract specific features, such as minutiae points (bifurcations and ridge endings). These features are then converted into a digital template.

For identification, a live fingerprint scan is compared against a stored database of fingerprint templates. If a match is found, the individual is identified. For verification, a live scan is compared against a single stored template to confirm the individual's claimed identity. Sormenjälkitunnus is widely used in various applications, including law enforcement, border control, access control systems, and mobile device security, due to its perceived accuracy and convenience. However, factors like dirt, moisture, or wear on the fingers can sometimes affect the performance of fingerprint scanners.