15. The face annotation system as recited in claim 14 , if the MKL-FR model is not able to identify query faces, the face annotation system further includes: a multiple-kernel learning face recognition fusion (FRF) module, performing a collaborative face recognition strategy by utilizing a user who features a highest priority rule within a collaborative face recognition framework based on characteristics of OSNs.
16. The face annotation system as recited in claim 15 , wherein the FRF module performs a selection of proper multiple MKL classifiers units and a fusion of multiple face identification results, wherein the proper multiple MKL classifier units are selected out of different personalized MKL classifier units belonging to all contacts of the current owner that are able to identify particular query face images within the collaborative face recognition framework.