Introduction Existing Methods Data-Dependent Methods Hash functions are learned from a given training dataset (learning to hash) Relatively short codes Seminal papers:(Salakhutdinov and Hinton,2007,2009;Torralba et al., 2008;Weiss et al.,2008) Two categories: 。Unimodal 。Supervised methods given the labels yi or triplet (xi,xj,x) Unsupervised methods Multimodal 。Supervised methods Unsupervised methods 日卡三4元，互Q0 Li (http://cs.nju.edu.cn/lwj) Learning to Hash LAMDA,CS.NJU 11 /43Introduction Existing Methods Data-Dependent Methods Hash functions are learned from a given training dataset (learning to hash). Relatively short codes Seminal papers: (Salakhutdinov and Hinton, 2007, 2009; Torralba et al., 2008; Weiss et al., 2008) Two categories: Unimodal Supervised methods given the labels yi or triplet (xi , xj , xk) Unsupervised methods Multimodal Supervised methods Unsupervised methods Li (http://cs.nju.edu.cn/lwj) Learning to Hash LAMDA, CS, NJU 11 / 43