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Graph Regularised Hashing

S. Moran, V. Lavrenko. ECIR 2015

[PDF] [Code] [Talk] [Poster]    
Image Retrieval ECIR Has Code Supervised

In this paper we propose a two-step iterative scheme, Graph Regularised Hashing (GRH), for incrementally adjusting the positioning of the hashing hypersurfaces to better conform to the supervisory signal: in the first step the binary bits are regularised using a data similarity graph so that similar data points receive similar bits. In the second step the regularised hashcodes form targets for a set of binary classifiers which shift the position of each hypersurface so as to separate opposite bits with maximum margin. GRH exhibits superior retrieval accuracy to competing hashing methods.

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