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Abstract:
Typically, k-means clustering or sparse coding is used for codebook generation in the bag-of-visual words (BOW) model. Local features are then encoded by calculating their similarities with visual words. However, some useful information is lost during this process. To make use of this information, in this paper, we propose a novel image representation method by going one step beyond visual word ambiguity and consider the governing regions of visual words. For each visual application, the weights of local features are determined by the corresponding visual application classifiers. Each weighted local feature is then encoded not only by considering its similarities with visual words, but also by visual words' governing regions. Besides, locality constraint is also imposed for efficient encoding. A weighted feature sign search algorithm is proposed to solve the problem. We conduct image classification experiments on several public datasets to demonstrate the effectiveness of the proposed method. (C) 2014 Elsevier Inc. All rights reserved.
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JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION
ISSN: 1047-3203
Year: 2014
Issue: 6
Volume: 25
Page: 1387-1398
2 . 6 0 0
JCR@2022
ESI Discipline: COMPUTER SCIENCE;
ESI HC Threshold:188
JCR Journal Grade:2
CAS Journal Grade:3
Cited Count:
WoS CC Cited Count: 3
SCOPUS Cited Count: 3
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 2