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Sparse Multi-Modal Hashing
IEEE TRANSACTIONS ON MULTIMEDIA, VOL. 16, NO. 2, FEBRUARY 2014 427
Sparse Multi-Modal Hashing
Fei Wu, Zhou Yu, Yi Yang, Siliang Tang, Yin Zhang, and Yueting Zhuang
Abstract—Learning hash functions across heterogenous high-di-
mensional features is very desirable for many applications in-
volving multi-modal data objects. In this paper, we propose an
approach to obtain the sparse codesets for the data objects across
different modalities via joint multi-modal dictionary learning,
which we call sparse multi-modal hashing (abbreviated as ).
In , both intra-modality similarity and inter-modality sim-
ilarity are first modeled by a hypergraph, then multi-modal
dictionaries are jointly learned by Hypergraph Laplacian sparse
coding. Based on the learned dictionaries, the sparse codeset
of each data object is acquired and conducted for multi-modal
approximate nearest neighbor retrieval using a sensitive Jaccard
metric. The experimental results show that outperforms
other methods in terms of mAP and Percentage on two real-world
data sets.
Index Terms—Dictionary learning, multi-modal hashing, sparse
coding.
I. INTRODUCTION
S IMILARITY search, a.k.a., nearest neighbor (NN) search,is a fundamental problem and has enjoyed great success
in many applications of data mining, database, and information
retrieval. With the explosive growth of high-dimensional data,
e.g., the images and videos on the web, there is an emerging
need of the NN search on high-dimensional feature space. The
problem of NN search can be described as follows: given a
query data object , finding the top- nearest neighbors to the
query from a target data set.
The simplest way to solve the NN search problem is the brute-
force linear search. However, this becomes prohibitively expen-
sive when the number of retrieved target data objects are very
large scale. To speed up the process of finding relevant data ob-
jects to a query, indexing techniques are necessarily conducted
to organize target data objects. However,
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