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Article
VAE-GAN based zero-shot outlier detection
ACM International Conference Proceeding Series
  • Bekkouch Imad Ibrahim, Institute of Data Science and AI
  • Dragos Constantin Nicolae, Institutul de Cercetari Pentru
  • Adil Khan, Institute of Data Science and AI
  • Syed Imran Ali, Kyung Hee University
  • Asad Khattak, Zayed University
Document Type
Conference Proceeding
Publication Date
11-17-2020
Abstract

© 2020 ACM. Outlier detection is one of the main fields in machine learning and it has been growing rapidly due to its wide range of applications. In the last few years, deep learning-based methods have outperformed machine learning and handcrafted outlier detection techniques, and our method is no different. We present a new twist to generative models which leverages variational autoencoders as a source for uniform distributions which can be used to separate the inliers from the outliers. Both the generative and adversarial parts of the model are used to obtain three main losses (Reconstruction loss, KL-divergence, Discriminative loss) which in return are wrapped with a one-class SVM which is used to make the predictions. We evaluated our method against several datasets both for images and tabular data and it has shown great results for the zero-shot outlier detection problem and was able to easily generalize it for supervised outlier detection tasks on which the performance has increased. For comparison, we evaluated our method against several of the common outlier detection techniques such as DBSCAN-based outlier detection, GMM, K-means and one class SVM directly, and we have outperformed all of them on all datasets.

ISBN
9781450388894
Publisher
ACM
Disciplines
Keywords
  • Deep Learning,
  • Generative Models,
  • Machine Learning,
  • Outlier Detection
Scopus ID
85101692127
Indexed in Scopus
Yes
Open Access
No
https://doi.org/10.1145/3440084.3441180
Citation Information
Bekkouch Imad Ibrahim, Dragos Constantin Nicolae, Adil Khan, Syed Imran Ali, et al.. "VAE-GAN based zero-shot outlier detection" ACM International Conference Proceeding Series (2020)
Available at: http://works.bepress.com/asad-khattak/89/