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Wei Liu, Jun Wang, Yadong Mu, Sanjiv and Chang, Shih-Fu Kumar. Compact Hyperplane Hashing with Bilinear Functions. In International Conference on Machine Learning (ICML), Edinburgh, Scotland, 2012.

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Hyperplane hashing aims at rapidly searching nearest points to a hyperplane, and has shown practical impact in scaling up active learning with SVMs. Unfortunately, the existing randomized methods need long hash codes to achieve reasonable search accuracy and thus suffer from reduced search speed and large memory overhead. To this end, this paper proposes a novel hyperplane hashing technique which yields compact hash codes. The key idea is the bilinear form of the proposed hash functions, which leads to higher collision probability than the existing hyperplane hash functions when using random projections. To further increase the performance, we propose a learning based framework in which the bilinear functions are directly learned from the data. This results in short yet discriminative codes, and also boosts the search performance over the random projection based solutions. Large-scale active learning experiments carried out on two datasets with up to one million samples demonstrate the overall superiority of the proposed approach


Wei Liu
Jun Wang
Yadong Mu

BibTex Reference

   Author = {Liu, Wei and Wang, Jun and Mu, Yadong and Kumar, Sanjiv       and Chang, Shih-Fu},
   Title = {Compact Hyperplane Hashing with Bilinear Functions},
   BookTitle = {International Conference on Machine Learning (ICML)},
   Address = {Edinburgh, Scotland},
   Year = {2012}

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