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Joint Augmented and Compressed Dictionaries for Robust Image Classification
Shaoning Zeng1; Yunbo Rao1; Bob Zhang2; Yong Xu3
2023-02-24
Source PublicationACM Transactions on Multimedia Computing Communications and Applications
ISSN1551-6857
Volume19Issue:3Pages:1–24
Abstract

Dictionary-based Classification (DC) has been a promising learning theory in multimedia computing. Previous studies focused on learning a discriminative dictionary as well as the sparsest representation based on the dictionary, to cope with the complex conditions in real-world applications. However, robustness by learning only one single dictionary is far from the optimal level. What is worse, it cannot take advantage of the available techniques proven in modern machine learning, like data augmentation, to mitigate the same problem. In this work, we propose a novel method that utilizes joint Augmented and Compressed Dictionaries for Robust Dictionary-based Classification (ACD-RDC). For optimization under the noise model introduced by real-world conditions, the objective function of ACD-RDC incorporates only two simple, but well-designed constraints, including one enhanced sparsity constraint by the general data augmentation, which requires less case-by-case and sophisticated tuning, and another discriminative constraint solved by a jointly learned dictionary. The optimization of the objective function is then deduced theoretically to an approximate linear problem. The sparsity and discrimination enhanced by data augmentation guarantees the robustness for image classification under various conditions, which constructs the first positive case using data augmentation to obtain robust dictionary-based classification. Numerous experiments have been conducted on popular facial and object image datasets. The results demonstrate that ACD-RDC obtains more promising classification on diversely collected images than the current dictionary-based classification methods. ACD-RDC is also confirmed to be a state-of-the-art classification method when using deep features as inputs.

KeywordClassification And Regression Inference Algorithms Supervised Learning Machine Learning
DOI10.1145/3572910
Indexed BySCIE
Language英語English
WOS Research AreaComputer Science
WOS SubjectComputer Science, Information Systems ; Computer Science, Software Engineering ; Computer Science, Theory & Methods
WOS IDWOS:001011934700011
Scopus ID2-s2.0-85168548638
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Document TypeJournal article
CollectionFaculty of Science and Technology
DEPARTMENT OF COMPUTER AND INFORMATION SCIENCE
Corresponding AuthorYunbo Rao; Bob Zhang
Affiliation1.University of Electronic Science and Technology of China, Huzhou, China
2.University of Macau, Macao, China
3.Harbin Institute of Technology, Shenzhen, China
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Shaoning Zeng,Yunbo Rao,Bob Zhang,et al. Joint Augmented and Compressed Dictionaries for Robust Image Classification[J]. ACM Transactions on Multimedia Computing Communications and Applications, 2023, 19(3), 1–24.
APA Shaoning Zeng., Yunbo Rao., Bob Zhang., & Yong Xu (2023). Joint Augmented and Compressed Dictionaries for Robust Image Classification. ACM Transactions on Multimedia Computing Communications and Applications, 19(3), 1–24.
MLA Shaoning Zeng,et al."Joint Augmented and Compressed Dictionaries for Robust Image Classification".ACM Transactions on Multimedia Computing Communications and Applications 19.3(2023):1–24.
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