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Unsupervised anomaly detection is a challenging task. Autoencoders (AEs) or generative models are often employed to model the data distribution of normal inputs and subsequently identify anomalous, out-of-distribution inputs by high…

机器学习 · 计算机科学 2025-06-12 Yalin Liao , Austin J. Brockmeier

Regularized autoencoders learn the latent codes, a structure with the regularization under the distribution, which enables them the capability to infer the latent codes given observations and generate new samples given the codes. However,…

机器学习 · 计算机科学 2019-02-18 Wenju Xu , Shawn Keshmiri , Guanghui Wang

Denoising autoencoders (DAE) are trained to reconstruct their clean inputs with noise injected at the input level, while variational autoencoders (VAE) are trained with noise injected in their stochastic hidden layer, with a regularizer…

机器学习 · 计算机科学 2016-01-05 Daniel Jiwoong Im , Sungjin Ahn , Roland Memisevic , Yoshua Bengio

Semi-supervised and unsupervised Generative Adversarial Networks (GAN)-based methods have been gaining popularity in anomaly detection task recently. However, GAN training is somewhat challenging and unstable. Inspired from previous work in…

计算机视觉与模式识别 · 计算机科学 2019-02-20 Ha Son Vu , Daisuke Ueta , Kiyoshi Hashimoto , Kazuki Maeno , Sugiri Pranata , Sheng Mei Shen

Anomaly detection is the task of recognising novel samples which deviate significantly from pre-establishednormality. Abnormal classes are not present during training meaning that models must learn effective rep-resentations solely across…

机器学习 · 计算机科学 2023-03-08 Jack W Barker , Neelanjan Bhowmik , Yona Falinie A Gaus , Toby P Breckon

We propose a flipped-Adversarial AutoEncoder (FAAE) that simultaneously trains a generative model G that maps an arbitrary latent code distribution to a data distribution and an encoder E that embodies an "inverse mapping" that encodes a…

机器学习 · 计算机科学 2018-04-05 Jiyi Zhang , Hung Dang , Hwee Kuan Lee , Ee-Chien Chang

Generative autoencoders offer a promising approach for controllable text generation by leveraging their latent sentence representations. However, current models struggle to maintain coherent latent spaces required to perform meaningful text…

机器学习 · 计算机科学 2020-07-08 Tianxiao Shen , Jonas Mueller , Regina Barzilay , Tommi Jaakkola

Text normalization is a ubiquitous process that appears as the first step of many Natural Language Processing problems. However, previous Deep Learning approaches have suffered from so-called silly errors, which are undetectable on…

计算与语言 · 计算机科学 2019-03-08 Adrián Javaloy Bornás , Ginés García Mateos

Given the three dimensional complexity of a video signal, training a robust and diverse GAN based video generative model is onerous due to large stochasticity involved in data space. Learning disentangled representations of the data help to…

计算机视觉与模式识别 · 计算机科学 2022-01-19 Sai Hemanth Kasaraneni

The field of neural generative models is dominated by the highly successful Generative Adversarial Networks (GANs) despite their challenges, such as training instability and mode collapse. Auto-Encoders (AE) with regularized latent space…

计算机视觉与模式识别 · 计算机科学 2020-05-19 Arnab Kumar Mondal , Sankalan Pal Chowdhury , Aravind Jayendran , Parag Singla , Himanshu Asnani , Prathosh AP

Today text classification models have been widely used. However, these classifiers are found to be easily fooled by adversarial examples. Fortunately, standard attacking methods generate adversarial texts in a pair-wise way, that is, an…

计算与语言 · 计算机科学 2020-03-24 Yankun Ren , Jianbin Lin , Siliang Tang , Jun Zhou , Shuang Yang , Yuan Qi , Xiang Ren

Text generation with generative adversarial networks (GANs) can be divided into the text-based and code-based categories according to the type of signals used for discrimination. In this work, we introduce a novel text-based approach called…

计算与语言 · 计算机科学 2019-04-24 Md. Akmal Haidar , Mehdi Rezagholizadeh , Alan Do-Omri , Ahmad Rashid

In this paper, we propose a model using generative adversarial net (GAN) to generate realistic text. Instead of using standard GAN, we combine variational autoencoder (VAE) with generative adversarial net. The use of high-level latent…

计算与语言 · 计算机科学 2018-11-08 Heng Wang , Zengchang Qin , Tao Wan

The Deep Neural Networks are vulnerable toadversarial exam-ples(Figure 1), making the DNNs-based systems collapsed byadding the inconspicuous perturbations to the images. Most of the existing works for adversarial attack are gradient-based…

计算机视觉与模式识别 · 计算机科学 2021-07-21 Shaohao Lu , Yuqiao Xian , Ke Yan , Yi Hu , Xing Sun , Xiaowei Guo , Feiyue Huang , Wei-Shi Zheng

In this paper, we propose the "adversarial autoencoder" (AAE), which is a probabilistic autoencoder that uses the recently proposed generative adversarial networks (GAN) to perform variational inference by matching the aggregated posterior…

机器学习 · 计算机科学 2016-05-26 Alireza Makhzani , Jonathon Shlens , Navdeep Jaitly , Ian Goodfellow , Brendan Frey

Recently, a generative variational autoencoder (VAE) has been proposed for speech enhancement to model speech statistics. However, this approach only uses clean speech in the training phase, making the estimation particularly sensitive to…

音频与语音处理 · 电气工程与系统科学 2021-05-18 Huajian Fang , Guillaume Carbajal , Stefan Wermter , Timo Gerkmann

We combine conditional variational autoencoders (VAE) with adversarial censoring in order to learn invariant representations that are disentangled from nuisance/sensitive variations. In this method, an adversarial network attempts to…

机器学习 · 计算机科学 2018-05-22 Ye Wang , Toshiaki Koike-Akino , Deniz Erdogmus

Generative models have thrived in computer vision, enabling unprecedented image processes. Yet the results in audio remain less advanced. Our project targets real-time sound synthesis from a reduced set of high-level parameters, including…

声音 · 计算机科学 2019-06-25 Adrien Bitton , Philippe Esling , Antoine Caillon , Martin Fouilleul

Recent work on generative modeling of text has found that variational auto-encoders (VAE) incorporating LSTM decoders perform worse than simpler LSTM language models (Bowman et al., 2015). This negative result is so far poorly understood,…

神经与进化计算 · 计算机科学 2017-06-20 Zichao Yang , Zhiting Hu , Ruslan Salakhutdinov , Taylor Berg-Kirkpatrick

Automatic detection of machine anomaly remains challenging for machine learning. We believe the capability of generative adversarial network (GAN) suits the need of machine audio anomaly detection, yet rarely has this been investigated by…

声音 · 计算机科学 2023-04-03 Anbai Jiang , Wei-Qiang Zhang , Yufeng Deng , Pingyi Fan , Jia Liu
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