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• W3042978870 abstract "Semantic hashing is a technique to represent high-dimensional data using similarity-preserving binary codes for efficient indexing and search. Recently, variational autoencoders with Bernoulli latent representations achieved remarkable success in learning such codes in supervised and unsupervised scenarios, outperforming traditional methods thanks to their ability to handle the binary constraints architecturally.In this paper, we propose a novel method for supervision (self-supervised) of variational autoencoders where the model uses its own predictions of the label distribution to implement the pairwise objective function. Also, we investigate the robustness of hashing methods based on variational autoencoders to the lack of supervision, focusing on two semi-supervised approaches currently in use. Our experiments on text and image retrieval tasks show that, as expected, both methods can significantly increase the quality of the hash codes as the number of labelled observations increases, but deteriorates when the amount of labelled samples decreases. In this scenario, the proposed self-supervised approach outperforms the classical approaches and yields similar performance in fully-supervised settings." @default.
• W3042978870 created "2020-07-23" @default.
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• W3042978870 date "2021-01-01" @default.
• W3042978870 modified "2023-10-18" @default.
• W3042978870 title "Self-supervised Bernoulli Autoencoders for Semi-supervised Hashing" @default.
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• W3042978870 doi "https://doi.org/10.1007/978-3-030-93420-0_25" @default.
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