Unsupervised Discriminative Deep Hashing With Locality and Globality Preservation
- 24 February 2021
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Signal Processing Letters
- Vol. 28 (10709908), 518-522
- https://doi.org/10.1109/lsp.2021.3059526
Abstract
Deep hashing has greatly improved retrieval performance with the powerful learning capability of deep neural network. However, deep unsupervised hashing can hardly achieve impressive performance due to the lack of the semantic supervision. This letter proposes Unsupervised Discriminative Deep Hashing (UD 2 H) to fulfill this gap. UD 2 H is formulated to jointly perform hash code learning and clustering, and trained in an asymmetric manner to improve the efficiency. The cluster labels supervise the training of deep model to enable hash code discriminative. Based on the outputs of the deep model, UD 2 H adaptively constructs a similarity graph that considers the local and global structures. Experiments on three benchmark datasets show that the proposed UD$^2$H outperforms the state-of-the-art unsupervised deep hashing methods.Funding Information
- National Natural Science Foundation of China (61906091, 62072241, 61906210)
- Natural Science Foundation of Jiangsu Province (BK20190440)
- Fundamental Research Funds for the Central Universities (30919011229)
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