Search Results for author: David Stutz

Found 21 papers, 15 papers with code

Conformalized Credal Set Predictors

1 code implementation16 Feb 2024 Alireza Javanmardi, David Stutz, Eyke Hüllermeier

Credal sets are sets of probability distributions that are considered as candidates for an imprecisely known ground-truth distribution.

Conformal Prediction Natural Language Inference +1

Certified Robust Models with Slack Control and Large Lipschitz Constants

1 code implementation12 Sep 2023 Max Losch, David Stutz, Bernt Schiele, Mario Fritz

In this paper, we propose a Calibrated Lipschitz-Margin Loss (CLL) that addresses this issue and improves certified robustness by tackling two problems: Firstly, commonly used margin losses do not adjust the penalties to the shrinking output distribution; caused by minimizing the Lipschitz constant $K$.

Unlocking Accuracy and Fairness in Differentially Private Image Classification

2 code implementations21 Aug 2023 Leonard Berrada, Soham De, Judy Hanwen Shen, Jamie Hayes, Robert Stanforth, David Stutz, Pushmeet Kohli, Samuel L. Smith, Borja Balle

The poor performance of classifiers trained with DP has prevented the widespread adoption of privacy preserving machine learning in industry.

Classification Fairness +2

Conformal prediction under ambiguous ground truth

1 code implementation18 Jul 2023 David Stutz, Abhijit Guha Roy, Tatiana Matejovicova, Patricia Strachan, Ali Taylan Cemgil, Arnaud Doucet

However, in many real-world scenarios, the labels $Y_1,..., Y_n$ are obtained by aggregating expert opinions using a voting procedure, resulting in a one-hot distribution $\mathbb{P}_{vote}^{Y|X}$.

Conformal Prediction Uncertainty Quantification

Robustifying Token Attention for Vision Transformers

1 code implementation ICCV 2023 Yong Guo, David Stutz, Bernt Schiele

Interestingly, we observe that the attention mechanism of ViTs tends to rely on few important tokens, a phenomenon we call token overfocusing.

Semantic Segmentation

Improving Robustness of Vision Transformers by Reducing Sensitivity To Patch Corruptions

1 code implementation CVPR 2023 Yong Guo, David Stutz, Bernt Schiele

Despite their success, vision transformers still remain vulnerable to image corruptions, such as noise or blur.

On Fragile Features and Batch Normalization in Adversarial Training

no code implementations26 Apr 2022 Nils Philipp Walter, David Stutz, Bernt Schiele

In order to shed light on the role of BN in adversarial training, we investigate to what extent the expressiveness of BN can be used to robustify fragile features in comparison to random features.

Adversarial Robustness

Improving Robustness by Enhancing Weak Subnets

1 code implementation30 Jan 2022 Yong Guo, David Stutz, Bernt Schiele

We show that EWS greatly improves both robustness against corrupted images as well as accuracy on clean data.

Adversarial Robustness Data Augmentation +1

Learning Optimal Conformal Classifiers

2 code implementations ICLR 2022 David Stutz, Krishnamurthy, Dvijotham, Ali Taylan Cemgil, Arnaud Doucet

However, using CP as a separate processing step after training prevents the underlying model from adapting to the prediction of confidence sets.

Conformal Prediction Medical Diagnosis

Random and Adversarial Bit Error Robustness: Energy-Efficient and Secure DNN Accelerators

no code implementations16 Apr 2021 David Stutz, Nandhini Chandramoorthy, Matthias Hein, Bernt Schiele

Moreover, we present a novel adversarial bit error attack and are able to obtain robustness against both targeted and untargeted bit-level attacks.

Quantization

Relating Adversarially Robust Generalization to Flat Minima

no code implementations ICCV 2021 David Stutz, Matthias Hein, Bernt Schiele

To this end, we propose average- and worst-case metrics to measure flatness in the robust loss landscape and show a correlation between good robust generalization and flatness.

Adversarial Robustness

Bit Error Robustness for Energy-Efficient DNN Accelerators

1 code implementation24 Jun 2020 David Stutz, Nandhini Chandramoorthy, Matthias Hein, Bernt Schiele

Low-voltage operation of DNN accelerators allows to further reduce energy consumption significantly, however, causes bit-level failures in the memory storing the quantized DNN weights.

Quantization

Adversarial Training against Location-Optimized Adversarial Patches

1 code implementation5 May 2020 Sukrut Rao, David Stutz, Bernt Schiele

Then, we apply adversarial training on these location-optimized adversarial patches and demonstrate significantly improved robustness on CIFAR10 and GTSRB.

Confidence-Calibrated Adversarial Training: Generalizing to Unseen Attacks

3 code implementations ICML 2020 David Stutz, Matthias Hein, Bernt Schiele

Our confidence-calibrated adversarial training (CCAT) tackles this problem by biasing the model towards low confidence predictions on adversarial examples.

Disentangling Adversarial Robustness and Generalization

2 code implementations CVPR 2019 David Stutz, Matthias Hein, Bernt Schiele

A recent hypothesis even states that both robust and accurate models are impossible, i. e., adversarial robustness and generalization are conflicting goals.

Adversarial Robustness

Learning 3D Shape Completion From Laser Scan Data With Weak Supervision

1 code implementation CVPR 2018 David Stutz, Andreas Geiger

Learning-based approaches, in contrast, avoid the expensive optimization step and instead directly predict the complete shape from the incomplete observations using deep neural networks.

Weakly-supervised Learning

Learning 3D Shape Completion under Weak Supervision

4 code implementations18 May 2018 David Stutz, Andreas Geiger

We address the problem of 3D shape completion from sparse and noisy point clouds, a fundamental problem in computer vision and robotics.

Weakly-supervised Learning

Superpixels: An Evaluation of the State-of-the-Art

2 code implementations6 Dec 2016 David Stutz, Alexander Hermans, Bastian Leibe

As such, and due to their quick adoption in a wide range of applications, appropriate benchmarks are crucial for algorithm selection and comparison.

Superpixels

Cannot find the paper you are looking for? You can Submit a new open access paper.