Introduction Problem Definition Nearest Neighbor Search(Retrieval) oGiven a query point g,return the points closest(similar)to g in the database(e.g.images). o Underlying many machine learning,data mining,information retrieval problems Challenge in Big Data Applications: o Curse of dimensionality Storage cost ●Query speed 日卡三4元，互Q0 Li (http://cs.nju.edu.cn/lwj) Learning to Hash CS.NJU 4/50Introduction Problem Definition Nearest Neighbor Search (Retrieval) Given a query point q, return the points closest (similar) to q in the database(e.g. images). Underlying many machine learning, data mining, information retrieval problems Challenge in Big Data Applications: Curse of dimensionality Storage cost Query speed Li (http://cs.nju.edu.cn/lwj) Learning to Hash CS, NJU 4 / 50