Sõrmejäljekanner

Sõrmejäljekanner is an Estonian term that translates to fingerprint scanner. A fingerprint scanner is a biometric device used to identify or authenticate a person by analyzing their unique fingerprint patterns. These scanners are commonly found in smartphones, laptops, and security systems.

The technology behind fingerprint scanners typically involves capturing an image of a person's fingerprint and then comparing it to a stored template. There are several types of fingerprint scanning technologies, including optical, capacitive, and ultrasonic sensors. Optical scanners capture a visual image of the fingerprint, often using light. Capacitive scanners use electrical charges to map the ridges and valleys of the fingerprint. Ultrasonic scanners employ high-frequency sound waves to create a detailed 3D map of the fingerprint.

When a user registers their fingerprint, the scanner creates a digital template of the pattern. During authentication, the scanner captures a new image of the fingerprint and compares it to the stored template. If the patterns match within a certain tolerance, the user is granted access or authenticated. The accuracy and reliability of fingerprint scanners have improved significantly over the years, making them a popular security feature. However, like any biometric system, they are not entirely infallible and can be affected by factors such as dirt, moisture, or damage to the fingerprint.