Various technologies pertaining to assigning metadata to images in a personal image collection of a user based upon images and associated metadata assigned thereto that are accessible to the user by way of a social network application are described. An account of the user in a social network application is accessed to retrieve images and metadata that is accessible to the user. A face recognition algorithm is trained based upon the retrieved images and metadata, and the trained face recognition algorithm is executed over the personal image collection of the user, where the personal image collection of the user is external to the social network application.