A collaborative face annotation method and a collaborative face annotation system adapted for a current owner to annotate contacts in online social networks (OSNs) are provided. The face annotation method includes: providing a Hierarchical Database Access (HDA) architecture for each member according to various social network contexts; providing a Fused Face Recognition (FFR) unit which uses an Adaboost algorithm to fuse a plurality types of base classifiers; and constructing a Face Recognizer by integrating the HDA architecture and the corresponding FFR unit for the owner and each member via respective types of the social network contexts; and selecting suitable personalized Face Recognizers and merging multiple personalized Face Recognizer results by using at least two collaborative FR strategies.
COLLABORATIVE FACE ANNOTATION METHOD AND COLLABORATIVE FACE ANNOTATION SYSTEM