LEARNING TO GEOLOCATE VIDEOS

A classifier training system trains classifiers for inferring the geographic locations of videos. A number of classifiers are provided, where each classifier corresponds to a particular location and is trained from a training set of videos that have been labeled as representing the location. In one embodiment, the training set is further restricted to those videos in which a landmark matching the location label is detected. The classifier training system extracts, from each of these videos, features that characterize the video, such as audiovisual features, text features, address features, landmark features, and category features. Based on these features, the classifier training system trains a location classifier for the corresponding location.Each of the location classifiers can be applied to videos without associated location labels to predict whether, or how strongly, the video represents the corresponding location. The prediction can be used for a variety of purposes, such as automatic labeling of videos with locations, presentation of location-specific advertisements in association with videos, and display of video data on relevant portions of an electronic map.