A tutorial on active learning Sanjoy Dasgupta1 John Langford2 UC San Diego1 Yahoo Labs2 Exploiting unlabeled data A lot of unlabeled data is plentiful and cheap, eg. documents off the web speech samples images and video But labeling can be expensive. Exploiting unlabeled data A lot of unlabeled data is plentiful and cheap, eg. documents off the web speech samples images and video But labeling can