Large-scale image retrieval benchmarks invariably consist of images from the
Web. Many of these benchmarks are derived from online photo sharing networks,
like Flickr, which in addition to hosting images also provide a highly
interactive social community. Such communities generate rich metadata that can
naturally be harnessed for image classification and retrieval. Here we study
four popular benchmark datasets, extending them with social-network metadata,
such as the groups to which each image belongs, the comment thread associated
with the image, who uploaded it, their location, and their network of friends.
Since these types of data are inherently relational, we propose a model that
explicitly accounts for the interdependencies between images sharing common
properties. We model the task as a binary labeling problem on a network, and
use structured learning techniques to learn model parameters. We find that
social-network metadata are useful in a variety of classification tasks, in
many cases outperforming methods based on image content.

研究了四个流行的基准数据集，扩展了它们的社交网络元数据，如每张图片所属的组，与该图片相关的评论线程，上传者，其位置和朋友的网络，探讨了社交网络元数据在图像分类中的应用，通过构建一个二元标签网络模型，使用结构化学习技术来学习模型参数，发现社交网络元数据在各种分类任务中很有用，并在许多情况下胜过基于图像内容的方法。