Proximity Preserving Binary Code using Signed Graph-Cut

• URL: http://arxiv.org/abs/2002.01793v1
• Date: Wed, 5 Feb 2020 13:58:41 GMT
• Title: Proximity Preserving Binary Code using Signed Graph-Cut
• Authors: Inbal Lav, Shai Avidan, Yoram Singer, Yacov Hel-Or
• Abstract summary: We introduce a binary embedding framework, called Proximity Preserving Code (PPC), which learns similarity and dissimilarity between data points to create a compact and affinity-preserving binary code. We show that the proposed approximation is superior to the commonly used spectral methods with respect to both accuracy and complexity.
• Score: 27.098042566421963
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We introduce a binary embedding framework, called Proximity Preserving Code (PPC), which learns similarity and dissimilarity between data points to create a compact and affinity-preserving binary code. This code can be used to apply fast and memory-efficient approximation to nearest-neighbor searches. Our framework is flexible, enabling different proximity definitions between data points. In contrast to previous methods that extract binary codes based on unsigned graph partitioning, our system models the attractive and repulsive forces in the data by incorporating positive and negative graph weights. The proposed framework is shown to boil down to finding the minimal cut of a signed graph, a problem known to be NP-hard. We offer an efficient approximation and achieve superior results by constructing the code bit after bit. We show that the proposed approximation is superior to the commonly used spectral methods with respect to both accuracy and complexity. Thus, it is useful for many other problems that can be translated into signed graph cut.

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