1. A method, comprising: storing a first image of a face in a memory; associating an identity with the first image of a face; subsequently collecting a plurality of additional images of faces; storing the additional images in the memory; constructing a data adjacency graph which provides a logical link between images of faces on the graph, wherein each image of a face is represented as a node on the graph and the graph comprises correlations between images; determining a correlation between features on the first image of a face and one or more of the plurality of additional images of faces; establishing a logical association between the first image of a face and one or more of the plurality of additional images of faces by computing a harmonic function solution 
 λ u =( L uu +γ g I ) −1 W ul λ l , where: λ is a vector of predictions; L is a Laplacian of the data adjacency graph (W), which is represented by a matrix (W) of pairwise similarities, and u and l are sets of labeled and unlabeled vertices in the data adjacency graph (W), respectively; and storing the correlation between the first image and the one or more of the plurality of additional images of faces.