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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…

Machine Learning · Computer Science 2018-04-05 Jiyi Zhang , Hung Dang , Hwee Kuan Lee , Ee-Chien Chang

Representation learning seeks to expose certain aspects of observed data in a learned representation that's amenable to downstream tasks like classification. For instance, a good representation for 2D images might be one that describes only…

Machine Learning · Computer Science 2017-03-07 Xi Chen , Diederik P. Kingma , Tim Salimans , Yan Duan , Prafulla Dhariwal , John Schulman , Ilya Sutskever , Pieter Abbeel

Deep neural networks (DNNs) are well known to be vulnerable to adversarial examples (AEs). In addition, AEs have adversarial transferability, namely, AEs generated for a source model fool other (target) models. In this paper, we investigate…

Computer Vision and Pattern Recognition · Computer Science 2022-09-08 Miki Tanaka , Isao Echizen , Hitoshi Kiya

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…

Computer Vision and Pattern Recognition · Computer Science 2019-02-20 Ha Son Vu , Daisuke Ueta , Kiyoshi Hashimoto , Kazuki Maeno , Sugiri Pranata , Sheng Mei Shen

Neural networks are prone to adversarial attacks. In general, such attacks deteriorate the quality of the input by either slightly modifying most of its pixels, or by occluding it with a patch. In this paper, we propose a method that keeps…

Computer Vision and Pattern Recognition · Computer Science 2019-10-18 Konrad Zolna , Michal Zajac , Negar Rostamzadeh , Pedro O. Pinheiro

Deep Neural Networks (DNNs) are highly sensitive to imperceptible malicious perturbations, known as adversarial attacks. Following the discovery of this vulnerability in real-world imaging and vision applications, the associated safety…

Computer Vision and Pattern Recognition · Computer Science 2022-07-19 Tsachi Blau , Roy Ganz , Bahjat Kawar , Alex Bronstein , Michael Elad

Recent studies have shown that deep convolutional neural networks (DCNN) are vulnerable to adversarial examples and sensitive to perceptual quality as well as the acquisition condition of images. These findings raise a big concern for the…

Machine Learning · Computer Science 2020-04-15 Yeli Feng , Yiyu Cai

Given a dataset of images containing different objects with different features such as shape, size, rotation, and x-y position; and a Variational Autoencoder (VAE); creating a disentangled encoding of these features in the hidden space…

Computer Vision and Pattern Recognition · Computer Science 2022-08-10 Mohammad Haghir Ebrahimabadi

The surrogate loss of variational autoencoders (VAEs) poses various challenges to their training, inducing the imbalance between task fitting and representation inference. To avert this, the existing strategies for VAEs focus on adjusting…

Neural and Evolutionary Computing · Computer Science 2024-04-02 Zhangkai Wu , Longbing Cao , Lei Qi

Conditional Variational Auto Encoders (VAE) are gathering significant attention as an Explainable Artificial Intelligence (XAI) tool. The codes in the latent space provide a theoretically sound way to produce counterfactuals, i.e.…

Machine Learning · Computer Science 2021-02-02 Nicolas Vercheval , Aleksandra Pizurica

Machine learning methods often need a large amount of labeled training data. Since the training data is assumed to be the ground truth, outliers can severely degrade learned representations and performance of trained models. Here we apply…

Machine Learning · Statistics 2019-12-24 Haleh Akrami , Anand A. Joshi , Jian Li , Sergul Aydore , Richard M. Leahy

In recent years, research on image generation methods has been developing fast. The auto-encoding variational Bayes method (VAEs) was proposed in 2013, which uses variational inference to learn a latent space from the image database and…

Computer Vision and Pattern Recognition · Computer Science 2018-07-12 Guoqiang Zhong , Wei Gao , Yongbin Liu , Youzhao Yang

Deep neural networks are vulnerable to adversarial attacks, which can fool them by adding minuscule perturbations to the input images. The robustness of existing defenses suffers greatly under white-box attack settings, where an adversary…

Computer Vision and Pattern Recognition · Computer Science 2019-07-30 Aamir Mustafa , Salman Khan , Munawar Hayat , Roland Goecke , Jianbing Shen , Ling Shao

The growing incorporation of artificial neural networks (NNs) into many fields, and especially into life-critical systems, is restrained by their vulnerability to adversarial examples (AEs). Some existing defense methods can increase NNs'…

Computer Vision and Pattern Recognition · Computer Science 2020-03-18 Haya Brama , Tal Grinshpoun

Adversarial patch attacks pose a significant threat to the practical deployment of deep learning systems. However, existing research primarily focuses on image pre-processing defenses, which often result in reduced classification accuracy…

Computer Vision and Pattern Recognition · Computer Science 2024-02-12 Nandish Chattopadhyay , Amira Guesmi , Muhammad Shafique

We apply variational autoencoders (VAE) to X-ray diffraction (XRD) data analysis on both simulated and experimental thin-film data. We show that crystal structure representations learned by a VAE reveal latent information, such as the…

Materials Science · Physics 2021-04-12 Lars Banko , Phillip M. Maffettone , Dennis Naujoks , Daniel Olds , Alfred Ludwig

Variational Autoencoders (VAEs) are well-established as a principled approach to probabilistic unsupervised learning with neural networks. Typically, an encoder network defines the parameters of a Gaussian distributed latent space from…

Machine Learning · Computer Science 2025-05-16 Alan Jeffares , Liyuan Liu

Deep neural networks (DNNs) have achieved great success in solving a variety of machine learning (ML) problems, especially in the domain of image recognition. However, recent research showed that DNNs can be highly vulnerable to…

Computer Vision and Pattern Recognition · Computer Science 2017-05-09 Nilaksh Das , Madhuri Shanbhogue , Shang-Tse Chen , Fred Hohman , Li Chen , Michael E. Kounavis , Duen Horng Chau

Adversarial attacks on image classification systems have always been an important problem in the field of machine learning, and generative adversarial networks (GANs), as popular models in the field of image generation, have been widely…

Computer Vision and Pattern Recognition · Computer Science 2024-12-25 Yahe Yang

The existence of adversarial images has seriously affected the task of image recognition and practical application of deep learning, it is also a key scientific problem that deep learning urgently needs to solve. By far the most effective…

Computer Vision and Pattern Recognition · Computer Science 2023-10-11 Yunuo Xiong , Shujuan Liu , Hongwei Xiong