Kasvojäljennystä

Kasvojäljennystä, often translated as facial recognition, is a biometric technology capable of identifying or verifying a person from a digital image or a video frame. It works by comparing selected facial features from the image with faces within a database. These features can include distances between eyes, nose, mouth, and jawline.

The process typically involves several stages. First, a face is detected in an image. Then, facial landmarks are located. Next, the face is normalized to account for variations in lighting and pose. Finally, the extracted features are converted into a numerical representation, or template, which is then compared against a database of known faces.

Kasvojäljennystä has various applications. It is used in security systems for access control and surveillance, in law enforcement for identifying suspects, and in consumer electronics for unlocking devices. It can also be employed for tagging people in photos on social media or for personalized marketing.

However, the technology also raises significant privacy concerns. The widespread use of kasvojäljennystä can lead to mass surveillance, and the accuracy of the technology can vary, potentially leading to misidentification. There are ongoing debates and efforts to regulate its use and ensure ethical deployment. The development of this technology is continuous, with ongoing research focused on improving accuracy, speed, and robustness across different conditions.