Search Results for author: Rebecca Roelofs

Found 21 papers, 11 papers with code

Mitigating Bias in Calibration Error Estimation

1 code implementation15 Dec 2020 Rebecca Roelofs, Nicholas Cain, Jonathon Shlens, Michael C. Mozer

We find that binning-based estimators with bins of equal mass (number of instances) have lower bias than estimators with bins of equal width.

Robust fine-tuning of zero-shot models

3 code implementations CVPR 2022 Mitchell Wortsman, Gabriel Ilharco, Jong Wook Kim, Mike Li, Simon Kornblith, Rebecca Roelofs, Raphael Gontijo-Lopes, Hannaneh Hajishirzi, Ali Farhadi, Hongseok Namkoong, Ludwig Schmidt

Compared to standard fine-tuning, WiSE-FT provides large accuracy improvements under distribution shift, while preserving high accuracy on the target distribution.

Ranked #12 on Image Classification on ObjectNet (using extra training data)

Image Classification Transfer Learning

Model soups: averaging weights of multiple fine-tuned models improves accuracy without increasing inference time

5 code implementations10 Mar 2022 Mitchell Wortsman, Gabriel Ilharco, Samir Yitzhak Gadre, Rebecca Roelofs, Raphael Gontijo-Lopes, Ari S. Morcos, Hongseok Namkoong, Ali Farhadi, Yair Carmon, Simon Kornblith, Ludwig Schmidt

The conventional recipe for maximizing model accuracy is to (1) train multiple models with various hyperparameters and (2) pick the individual model which performs best on a held-out validation set, discarding the remainder.

 Ranked #1 on Image Classification on ImageNet V2 (using extra training data)

Domain Generalization Image Classification +2

Do CIFAR-10 Classifiers Generalize to CIFAR-10?

3 code implementations1 Jun 2018 Benjamin Recht, Rebecca Roelofs, Ludwig Schmidt, Vaishaal Shankar

Although we ensure that the new test set is as close to the original data distribution as possible, we find a large drop in accuracy (4% to 10%) for a broad range of deep learning models.

The Marginal Value of Adaptive Gradient Methods in Machine Learning

3 code implementations NeurIPS 2017 Ashia C. Wilson, Rebecca Roelofs, Mitchell Stern, Nathan Srebro, Benjamin Recht

Adaptive optimization methods, which perform local optimization with a metric constructed from the history of iterates, are becoming increasingly popular for training deep neural networks.

BIG-bench Machine Learning Binary Classification

Do Image Classifiers Generalize Across Time?

1 code implementation ICCV 2021 Vaishaal Shankar, Achal Dave, Rebecca Roelofs, Deva Ramanan, Benjamin Recht, Ludwig Schmidt

Additionally, we evaluate three detection models and show that natural perturbations induce both classification as well as localization errors, leading to a median drop in detection mAP of 14 points.

General Classification Video Object Detection

AdaMatch: A Unified Approach to Semi-Supervised Learning and Domain Adaptation

5 code implementations ICLR 2022 David Berthelot, Rebecca Roelofs, Kihyuk Sohn, Nicholas Carlini, Alex Kurakin

We extend semi-supervised learning to the problem of domain adaptation to learn significantly higher-accuracy models that train on one data distribution and test on a different one.

Semi-supervised Domain Adaptation Unsupervised Domain Adaptation

CausalAgents: A Robustness Benchmark for Motion Forecasting using Causal Relationships

1 code implementation7 Jul 2022 Rebecca Roelofs, Liting Sun, Ben Caine, Khaled S. Refaat, Ben Sapp, Scott Ettinger, Wei Chai

Finally, we release the causal agent labels (at https://github. com/google-research/causal-agents) as an additional attribute to WOMD and the robustness benchmarks to aid the community in building more reliable and safe deep-learning models for motion forecasting.

Attribute Autonomous Vehicles +1

When does dough become a bagel? Analyzing the remaining mistakes on ImageNet

1 code implementation9 May 2022 Vijay Vasudevan, Benjamin Caine, Raphael Gontijo-Lopes, Sara Fridovich-Keil, Rebecca Roelofs

To help contextualize progress on ImageNet and provide a more meaningful evaluation for today's state-of-the-art models, we manually review and categorize every remaining mistake that a few top models make in order to provide insight into the long-tail of errors on one of the most benchmarked datasets in computer vision.

Image Classification

Large Scale Kernel Learning using Block Coordinate Descent

no code implementations17 Feb 2016 Stephen Tu, Rebecca Roelofs, Shivaram Venkataraman, Benjamin Recht

We demonstrate that distributed block coordinate descent can quickly solve kernel regression and classification problems with millions of data points.

Classification General Classification +1

A Meta-Analysis of Overfitting in Machine Learning

no code implementations NeurIPS 2019 Rebecca Roelofs, Vaishaal Shankar, Benjamin Recht, Sara Fridovich-Keil, Moritz Hardt, John Miller, Ludwig Schmidt

By systematically comparing the public ranking with the final ranking, we assess how much participants adapted to the holdout set over the course of a competition.

BIG-bench Machine Learning Holdout Set

Pseudo-labeling for Scalable 3D Object Detection

no code implementations2 Mar 2021 Benjamin Caine, Rebecca Roelofs, Vijay Vasudevan, Jiquan Ngiam, Yuning Chai, Zhifeng Chen, Jonathon Shlens

To safely deploy autonomous vehicles, onboard perception systems must work reliably at high accuracy across a diverse set of environments and geographies.

3D Object Detection Autonomous Vehicles +5

The Evolution of Out-of-Distribution Robustness Throughout Fine-Tuning

no code implementations30 Jun 2021 Anders Andreassen, Yasaman Bahri, Behnam Neyshabur, Rebecca Roelofs

Although machine learning models typically experience a drop in performance on out-of-distribution data, accuracies on in- versus out-of-distribution data are widely observed to follow a single linear trend when evaluated across a testbed of models.

Spectral Bias in Practice: The Role of Function Frequency in Generalization

no code implementations6 Oct 2021 Sara Fridovich-Keil, Raphael Gontijo-Lopes, Rebecca Roelofs

We also explore the connections between function frequency and image frequency and find that spectral bias is sensitive to the low frequencies prevalent in natural images.

Data Augmentation Image Classification

Imitation Is Not Enough: Robustifying Imitation with Reinforcement Learning for Challenging Driving Scenarios

no code implementations21 Dec 2022 Yiren Lu, Justin Fu, George Tucker, Xinlei Pan, Eli Bronstein, Rebecca Roelofs, Benjamin Sapp, Brandyn White, Aleksandra Faust, Shimon Whiteson, Dragomir Anguelov, Sergey Levine

To our knowledge, this is the first application of a combined imitation and reinforcement learning approach in autonomous driving that utilizes large amounts of real-world human driving data.

Autonomous Driving Imitation Learning +2

Multi-Agent Reachability Calibration with Conformal Prediction

no code implementations2 Apr 2023 Anish Muthali, Haotian Shen, Sampada Deglurkar, Michael H. Lim, Rebecca Roelofs, Aleksandra Faust, Claire Tomlin

We investigate methods to provide safety assurances for autonomous agents that incorporate predictions of other, uncontrolled agents' behavior into their own trajectory planning.

Autonomous Driving Conformal Prediction +2

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