Facedetection, Eigenvectors, Eigenvalue, Artificial Intelligence, Computer Vision.
When we get a new ball( a new face), make it smaller ( get the eigenvector i.e. Eigen face) and then project it onto the face space. Like the board did earlier it will find the Euclidean distance, if the ball is closest to or in the region of the “green Eigen face” we say, the new image is probably