Global similarity preserving hashing

Global similarity preserving hashing
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全局相似性保持散列

DOI:
10.1007/s00500-017-2683-7
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发表时间:
2017-07
期刊:
影响因子:
4.1
通讯作者:
Musin Sun
Musin Sun
中科院分区:
计算机科学3区
文献类型:
--
作者:
Yang Liu;Lin Feng;Shenglan Liu;Musin Sun

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近年来,随着数据量的爆炸性增长,哈希学习引起了越来越多的关注。大多数现有的哈希学习方法可以分为两个阶段。首先,获得原始数据的低维表示。其次,对每个样本的低维表示进行降维,并将其映射为二进制码。这种两阶段哈希框架将投影操作和量化操作分离,并且在这种两阶段操作之后不能很好地保留原始数据结构。考虑到这一点,提出了全局相似性保持哈希算法(GSPH),该算法利用联合哈希框架将原始数据直接投影到汉明空间,同时减小了投影误差和量化损失。此外,GSPH提出了一种基于全局相似性的数据样本重构方法,该方法更精确地描述了原始数据的内在流形结构。在Corel、CIFAR、LabelMe和NUS-WIDE数据集上的图像检索实验结果表明,该算法的性能优于其他几种最先进的方法。
Hashing learning has attracted increasing attention these years with the explosive increase in data volume. Most existing hashing learning methods can be divided into two stages. Firstly, obtain low-dimensional representation of the original data. Secondly, quantize the low-dimensional representation of each sample and map them to binary codes. This two-stage hashing framework separates projection operation and quantization operation apart, and the original data structure cannot be well preserved after this kind of two-stage operation. Considering this, global similarity preserving hashing (GSPH) is proposed, which utilizes a joint hashing framework to directly project the original data to hamming space, and reduces the projection error and the quantization loss simultaneously. Moreover, GSPH presents a global similarity-based data sample reconstruction method, which describes the intrinsic manifold structure of original data more precisely. The image retrieval experimental results on Corel, CIFAR, LabelMe and NUS-WIDE datasets illustrate that our algorithm outperforms several other state-of-the-art methods.
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