1. The document proposes a facial recognition system using OpenCV for biometric authentication in a library management system.
2. The system has two phases: a data generation phase that enrolls user images in a database, and a recognition phase that identifies users by comparing input images to the database.
3. In the recognition phase, preprocessing such as grayscale conversion and histogram equalization is performed before feature extraction using algorithms like LBPH, SIFT, LDA, and PCA to generate faceprints for comparison and verification against the database.