Search Results for author: Andrew Ilyas

Found 32 papers, 26 papers with code

Statistical Bias in Dataset Replication

no code implementations ICML 2020 Logan Engstrom, Andrew Ilyas, Shibani Santurkar, Dimitris Tsipras, Jacob Steinhardt, Aleksander Madry

Dataset replication is a useful tool for assessing whether models have overfit to a specific validation set or the exact circumstances under which it was generated.

Decomposing and Editing Predictions by Modeling Model Computation

1 code implementation17 Apr 2024 Harshay Shah, Andrew Ilyas, Aleksander Madry

The goal of component modeling is to decompose an ML model's prediction in terms of its components -- simple functions (e. g., convolution filters, attention heads) that are the "building blocks" of model computation.

counterfactual Model Editing

User Strategization and Trustworthy Algorithms

no code implementations29 Dec 2023 Sarah H. Cen, Andrew Ilyas, Aleksander Madry

The developers of these algorithms commonly adopt the assumption that the data generating process is exogenous: that is, how a user reacts to a given prompt (e. g., a recommendation or hiring suggestion) depends on the prompt and not on the algorithm that generated it.

counterfactual Recommendation Systems

Rethinking Backdoor Attacks

no code implementations19 Jul 2023 Alaa Khaddaj, Guillaume Leclerc, Aleksandar Makelov, Kristian Georgiev, Hadi Salman, Andrew Ilyas, Aleksander Madry

In a backdoor attack, an adversary inserts maliciously constructed backdoor examples into a training set to make the resulting model vulnerable to manipulation.

Backdoor Attack

FFCV: Accelerating Training by Removing Data Bottlenecks

2 code implementations CVPR 2023 Guillaume Leclerc, Andrew Ilyas, Logan Engstrom, Sung Min Park, Hadi Salman, Aleksander Madry

For example, we are able to train an ImageNet ResNet-50 model to 75\% in only 20 mins on a single machine.

TRAK: Attributing Model Behavior at Scale

2 code implementations24 Mar 2023 Sung Min Park, Kristian Georgiev, Andrew Ilyas, Guillaume Leclerc, Aleksander Madry

That is, computationally tractable methods can struggle with accurately attributing model predictions in non-convex settings (e. g., in the context of deep neural networks), while methods that are effective in such regimes require training thousands of models, which makes them impractical for large models or datasets.

Raising the Cost of Malicious AI-Powered Image Editing

1 code implementation13 Feb 2023 Hadi Salman, Alaa Khaddaj, Guillaume Leclerc, Andrew Ilyas, Aleksander Madry

We present an approach to mitigating the risks of malicious image editing posed by large diffusion models.

ModelDiff: A Framework for Comparing Learning Algorithms

1 code implementation22 Nov 2022 Harshay Shah, Sung Min Park, Andrew Ilyas, Aleksander Madry

We study the problem of (learning) algorithm comparison, where the goal is to find differences between models trained with two different learning algorithms.

Data Augmentation

When does Bias Transfer in Transfer Learning?

1 code implementation6 Jul 2022 Hadi Salman, Saachi Jain, Andrew Ilyas, Logan Engstrom, Eric Wong, Aleksander Madry

Using transfer learning to adapt a pre-trained "source model" to a downstream "target task" can dramatically increase performance with seemingly no downside.

Transfer Learning

What Makes A Good Fisherman? Linear Regression under Self-Selection Bias

no code implementations6 May 2022 Yeshwanth Cherapanamjeri, Constantinos Daskalakis, Andrew Ilyas, Manolis Zampetakis

In known-index self-selection, the identity of the observed model output is observable; in unknown-index self-selection, it is not.

Econometrics Imitation Learning +2

Estimation of Standard Auction Models

no code implementations4 May 2022 Yeshwanth Cherapanamjeri, Constantinos Daskalakis, Andrew Ilyas, Manolis Zampetakis

We provide efficient estimation methods for first- and second-price auctions under independent (asymmetric) private values and partial observability.

Econometrics

Datamodels: Predicting Predictions from Training Data

1 code implementation1 Feb 2022 Andrew Ilyas, Sung Min Park, Logan Engstrom, Guillaume Leclerc, Aleksander Madry

We present a conceptual framework, datamodeling, for analyzing the behavior of a model class in terms of the training data.

3DB: A Framework for Debugging Computer Vision Models

1 code implementation7 Jun 2021 Guillaume Leclerc, Hadi Salman, Andrew Ilyas, Sai Vemprala, Logan Engstrom, Vibhav Vineet, Kai Xiao, Pengchuan Zhang, Shibani Santurkar, Greg Yang, Ashish Kapoor, Aleksander Madry

We introduce 3DB: an extendable, unified framework for testing and debugging vision models using photorealistic simulation.

Unadversarial Examples: Designing Objects for Robust Vision

2 code implementations NeurIPS 2021 Hadi Salman, Andrew Ilyas, Logan Engstrom, Sai Vemprala, Aleksander Madry, Ashish Kapoor

We study a class of realistic computer vision settings wherein one can influence the design of the objects being recognized.

BIG-bench Machine Learning

Do Adversarially Robust ImageNet Models Transfer Better?

2 code implementations NeurIPS 2020 Hadi Salman, Andrew Ilyas, Logan Engstrom, Ashish Kapoor, Aleksander Madry

Typically, better pre-trained models yield better transfer results, suggesting that initial accuracy is a key aspect of transfer learning performance.

Transfer Learning

Implementation Matters in Deep Policy Gradients: A Case Study on PPO and TRPO

2 code implementations25 May 2020 Logan Engstrom, Andrew Ilyas, Shibani Santurkar, Dimitris Tsipras, Firdaus Janoos, Larry Rudolph, Aleksander Madry

We study the roots of algorithmic progress in deep policy gradient algorithms through a case study on two popular algorithms: Proximal Policy Optimization (PPO) and Trust Region Policy Optimization (TRPO).

reinforcement-learning Reinforcement Learning (RL)

Identifying Statistical Bias in Dataset Replication

1 code implementation19 May 2020 Logan Engstrom, Andrew Ilyas, Shibani Santurkar, Dimitris Tsipras, Jacob Steinhardt, Aleksander Madry

We study ImageNet-v2, a replication of the ImageNet dataset on which models exhibit a significant (11-14%) drop in accuracy, even after controlling for a standard human-in-the-loop measure of data quality.

Implementation Matters in Deep RL: A Case Study on PPO and TRPO

2 code implementations ICLR 2020 Logan Engstrom, Andrew Ilyas, Shibani Santurkar, Dimitris Tsipras, Firdaus Janoos, Larry Rudolph, Aleksander Madry

We study the roots of algorithmic progress in deep policy gradient algorithms through a case study on two popular algorithms, Proximal Policy Optimization and Trust Region Policy Optimization.

reinforcement-learning Reinforcement Learning (RL)

Image Synthesis with a Single (Robust) Classifier

1 code implementation NeurIPS 2019 Shibani Santurkar, Dimitris Tsipras, Brandon Tran, Andrew Ilyas, Logan Engstrom, Aleksander Madry

We show that the basic classification framework alone can be used to tackle some of the most challenging tasks in image synthesis.

Ranked #60 on Image Generation on CIFAR-10 (Inception score metric)

Adversarial Robustness Image Generation

Adversarial Robustness as a Prior for Learned Representations

5 code implementations3 Jun 2019 Logan Engstrom, Andrew Ilyas, Shibani Santurkar, Dimitris Tsipras, Brandon Tran, Aleksander Madry

In this work, we show that robust optimization can be re-cast as a tool for enforcing priors on the features learned by deep neural networks.

Adversarial Robustness

Adversarial Examples Are Not Bugs, They Are Features

4 code implementations NeurIPS 2019 Andrew Ilyas, Shibani Santurkar, Dimitris Tsipras, Logan Engstrom, Brandon Tran, Aleksander Madry

Adversarial examples have attracted significant attention in machine learning, but the reasons for their existence and pervasiveness remain unclear.

BIG-bench Machine Learning

A Closer Look at Deep Policy Gradients

no code implementations ICLR 2020 Andrew Ilyas, Logan Engstrom, Shibani Santurkar, Dimitris Tsipras, Firdaus Janoos, Larry Rudolph, Aleksander Madry

We study how the behavior of deep policy gradient algorithms reflects the conceptual framework motivating their development.

Value prediction

Evaluating and Understanding the Robustness of Adversarial Logit Pairing

1 code implementation26 Jul 2018 Logan Engstrom, Andrew Ilyas, Anish Athalye

We evaluate the robustness of Adversarial Logit Pairing, a recently proposed defense against adversarial examples.

Adversarial Attack

Prior Convictions: Black-Box Adversarial Attacks with Bandits and Priors

3 code implementations ICLR 2019 Andrew Ilyas, Logan Engstrom, Aleksander Madry

We study the problem of generating adversarial examples in a black-box setting in which only loss-oracle access to a model is available.

How Does Batch Normalization Help Optimization?

11 code implementations NeurIPS 2018 Shibani Santurkar, Dimitris Tsipras, Andrew Ilyas, Aleksander Madry

Batch Normalization (BatchNorm) is a widely adopted technique that enables faster and more stable training of deep neural networks (DNNs).

Black-box Adversarial Attacks with Limited Queries and Information

2 code implementations ICML 2018 Andrew Ilyas, Logan Engstrom, Anish Athalye, Jessy Lin

Current neural network-based classifiers are susceptible to adversarial examples even in the black-box setting, where the attacker only has query access to the model.

The Robust Manifold Defense: Adversarial Training using Generative Models

1 code implementation26 Dec 2017 Ajil Jalal, Andrew Ilyas, Constantinos Daskalakis, Alexandros G. Dimakis

Our formulation involves solving a min-max problem, where the min player sets the parameters of the classifier and the max player is running our attack, and is thus searching for adversarial examples in the {\em low-dimensional} input space of the spanner.

Query-Efficient Black-box Adversarial Examples (superceded)

1 code implementation19 Dec 2017 Andrew Ilyas, Logan Engstrom, Anish Athalye, Jessy Lin

Second, we introduce a new algorithm to perform targeted adversarial attacks in the partial-information setting, where the attacker only has access to a limited number of target classes.

Adversarial Attack

Training GANs with Optimism

1 code implementation ICLR 2018 Constantinos Daskalakis, Andrew Ilyas, Vasilis Syrgkanis, Haoyang Zeng

Moreover, we show that optimistic mirror decent addresses the limit cycling problem in training WGANs.

Synthesizing Robust Adversarial Examples

3 code implementations24 Jul 2017 Anish Athalye, Logan Engstrom, Andrew Ilyas, Kevin Kwok

We demonstrate the existence of robust 3D adversarial objects, and we present the first algorithm for synthesizing examples that are adversarial over a chosen distribution of transformations.

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