Search Results for author: Sergul Aydore

Found 16 papers, 7 papers with code

Membership Inference Attacks on Diffusion Models via Quantile Regression

no code implementations8 Dec 2023 Shuai Tang, Zhiwei Steven Wu, Sergul Aydore, Michael Kearns, Aaron Roth

Our proposed MI attack learns quantile regression models that predict (a quantile of) the distribution of reconstruction loss on examples not used in training.

Image Generation regression

Beta quantile regression for robust estimation of uncertainty in the presence of outliers

no code implementations14 Sep 2023 Haleh Akrami, Omar Zamzam, Anand Joshi, Sergul Aydore, Richard Leahy

Outlier features can compromise the performance of deep learning regression problems such as style translation, image reconstruction, and deep anomaly detection, potentially leading to misleading conclusions.

Anomaly Detection Image Reconstruction +3

Private Synthetic Data for Multitask Learning and Marginal Queries

no code implementations15 Sep 2022 Giuseppe Vietri, Cedric Archambeau, Sergul Aydore, William Brown, Michael Kearns, Aaron Roth, Ankit Siva, Shuai Tang, Zhiwei Steven Wu

A key innovation in our algorithm is the ability to directly handle numerical features, in contrast to a number of related prior approaches which require numerical features to be first converted into {high cardinality} categorical features via {a binning strategy}.

Deep Quantile Regression for Uncertainty Estimation in Unsupervised and Supervised Lesion Detection

1 code implementation20 Sep 2021 Haleh Akrami, Anand Joshi, Sergul Aydore, Richard Leahy

Here we address the problem of quantifying uncertainty in the images that are reconstructed by the VAE as the basis for principled outlier or lesion detection.

Anomaly Detection Lesion Detection +2

Differentially Private Query Release Through Adaptive Projection

1 code implementation11 Mar 2021 Sergul Aydore, William Brown, Michael Kearns, Krishnaram Kenthapadi, Luca Melis, Aaron Roth, Ankit Siva

We propose, implement, and evaluate a new algorithm for releasing answers to very large numbers of statistical queries like $k$-way marginals, subject to differential privacy.

Adversarial Robustness with Non-uniform Perturbations

1 code implementation NeurIPS 2021 Ecenaz Erdemir, Jeffrey Bickford, Luca Melis, Sergul Aydore

Robustness of machine learning models is critical for security related applications, where real-world adversaries are uniquely focused on evading neural network based detectors.

Adversarial Robustness Malware Classification +1

Addressing Variance Shrinkage in Variational Autoencoders using Quantile Regression

no code implementations18 Oct 2020 Haleh Akrami, Anand A. Joshi, Sergul Aydore, Richard M. Leahy

Using estimated quantiles to compute mean and variance under the Gaussian assumption, we compute reconstruction probability as a principled approach to outlier or anomaly detection.

Anomaly Detection Lesion Detection +1

Robust Variational Autoencoder for Tabular Data with Beta Divergence

no code implementations15 Jun 2020 Haleh Akrami, Sergul Aydore, Richard M. Leahy, Anand A. Joshi

The source of outliers in training data include the data collection process itself (random noise) or a malicious attacker (data poisoning) who may target to degrade the performance of the machine learning model.

Anomaly Detection Data Poisoning

DropCluster: A structured dropout for convolutional networks

1 code implementation7 Feb 2020 Liyan Chen, Philip Gautier, Sergul Aydore

Dropout as a regularizer in deep neural networks has been less effective in convolutional layers than in fully connected layers.

ROMark: A Robust Watermarking System Using Adversarial Training

no code implementations2 Oct 2019 Bingyang Wen, Sergul Aydore

It protects the copyright of digital content by embedding imperceptible information into the data in the presence of an adversary.

BIG-bench Machine Learning

Robust Variational Autoencoder

no code implementations23 May 2019 Haleh Akrami, Anand A. Joshi, Jian Li, Sergul Aydore, Richard M. Leahy

Machine learning methods often need a large amount of labeled training data.

Outlier Detection

Time-Smoothed Gradients for Online Forecasting

no code implementations21 May 2019 Tianhao Zhu, Sergul Aydore

Here, we study different update rules in stochastic gradient descent (SGD) for online forecasting problems.

A Local Regret in Nonconvex Online Learning

no code implementations13 Nov 2018 Sergul Aydore, Lee Dicker, Dean Foster

We consider an online learning process to forecast a sequence of outcomes for nonconvex models.

Feature Grouping as a Stochastic Regularizer for High-Dimensional Structured Data

1 code implementation31 Jul 2018 Sergul Aydore, Bertrand Thirion, Gael Varoquaux

In many applications where collecting data is expensive, for example neuroscience or medical imaging, the sample size is typically small compared to the feature dimension.

Clustering Denoising +2

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