Timezone: »
We propose probabilistic latent variable models for multi-view anomaly detection, which is the task of finding instances that have inconsistent views given multi-view data. With the proposed model, all views of a non-anomalous instance are assumed to be generated from a single latent vector. On the other hand, an anomalous instance is assumed to have multiple latent vectors, and its different views are generated from different latent vectors. By inferring the number of latent vectors used for each instance with Dirichlet process priors, we obtain multi-view anomaly scores. The proposed model can be seen as a robust extension of probabilistic canonical correlation analysis for noisy multi-view data. We present Bayesian inference procedures for the proposed model based on a stochastic EM algorithm. The effectiveness of the proposed model is demonstrated in terms of performance when detecting multi-view anomalies.
Author Information
Tomoharu Iwata (NTT)
Makoto Yamada (Kyoto University)
More from the Same Authors
-
2022 Poster: Symplectic Spectrum Gaussian Processes: Learning Hamiltonians from Noisy and Sparse Data »
Yusuke Tanaka · Tomoharu Iwata · naonori ueda -
2022 Poster: Few-shot Learning for Feature Selection with Hilbert-Schmidt Independence Criterion »
Atsutoshi Kumagai · Tomoharu Iwata · Yasutoshi Ida · Yasuhiro Fujiwara -
2022 Poster: Sharing Knowledge for Meta-learning with Feature Descriptions »
Tomoharu Iwata · Atsutoshi Kumagai -
2021 Poster: Meta-Learning for Relative Density-Ratio Estimation »
Atsutoshi Kumagai · Tomoharu Iwata · Yasuhiro Fujiwara -
2021 Poster: Loss function based second-order Jensen inequality and its application to particle variational inference »
Futoshi Futami · Tomoharu Iwata · naonori ueda · Issei Sato · Masashi Sugiyama -
2019 Poster: Transfer Anomaly Detection by Inferring Latent Domain Representations »
Atsutoshi Kumagai · Tomoharu Iwata · Yasuhiro Fujiwara -
2019 Poster: Spatially Aggregated Gaussian Processes with Multivariate Areal Outputs »
Yusuke Tanaka · Toshiyuki Tanaka · Tomoharu Iwata · Takeshi Kurashima · Maya Okawa · Yasunori Akagi · Hiroyuki Toda -
2015 Poster: Cross-Domain Matching for Bag-of-Words Data via Kernel Embeddings of Latent Distributions »
Yuya Yoshikawa · Tomoharu Iwata · Hiroshi Sawada · Takeshi Yamada -
2014 Poster: Latent Support Measure Machines for Bag-of-Words Data Classification »
Yuya Yoshikawa · Tomoharu Iwata · Hiroshi Sawada -
2011 Poster: Relative Density-Ratio Estimation for Robust Distribution Comparison »
Makoto Yamada · Taiji Suzuki · Takafumi Kanamori · Hirotaka Hachiya · Masashi Sugiyama