Summary of Current Work on Active Learning

In this draft, we summarize the approaches that have been proposed and studied for active learning in the past. It was proposed in the late 1980s [2, 4]. The main idea to selectively choose examples for soliciting labels such that the number of examples required labeling can be reduced dramatically. In the following, we will first review the list of theories and algorithms that have been proposed and studied for active learning, followed by the discussion of applications of active learning.