Kasvontunnistus

Kasvontunnistus, known in English as facial recognition, is a biometric technology capable of identifying or verifying a person from a digital image or a video frame from a video source. It compares selected facial features from a given image to faces within a database. The technology has various applications, including security, surveillance, and personal identification.

The process typically involves several steps. First, a face detection algorithm identifies and locates human faces within an image. Second, facial features such as the distance between eyes, the shape of cheekbones, and the contour of the jawline are analyzed and converted into a numerical code, often referred to as a facial signature or template. This signature is then compared against a database of known facial signatures. If a match is found above a certain confidence threshold, the system identifies the individual.

Kasvontunnistus technology has evolved significantly over the years, with advancements in algorithms and processing power leading to increased accuracy and speed. However, challenges remain, including variations in lighting, pose, facial expressions, and occlusions (like masks or glasses), which can affect performance. Ethical considerations and privacy concerns are also prominent discussions surrounding its deployment, particularly regarding mass surveillance and potential for misuse. Different jurisdictions have varying regulations regarding the use of this technology.