Keuper Labs

Research

Highlights

ICPR 20206Best Paper Award for our work on document parsing... BMVC 262 paper accepted ECCV 2026full paper + 4 workshop paper accepted TPAMI 2026full paper accepted Neu Open Source Lib NCATorch TMLR 263 journal paper ICML 2026presenting 2 paper: a full paper and a TMLR J2C ICLR 262 full paper accepted TMLR 26with J2C Certification (top 10%) NeurIPs 25oral presentation and 2 workshop paper

Resources

Videoson YouTube

Find videos from our talks and online paper presentations in our YouTube Channel

Source CodeOn GitHub

We typically publish the code with our papers on our GitHub page.

Publications

Selected list of recent papers. A full list of all publications can be found at our Google Scholar page.

2026

Tejaswini Medi, Levan Mikeladze, Margret Keuper
BMVC 26  ·  01 Jun 2026

Robustness should extend across classes, rather than concentrating on the easiest ones. RL-FAT combines reinforcement-learning-inspired feedback with a fairness-focused loss to reduce class-wise disparities during adversarial training.

Pius Horn, Janis Keuper
BMVC 26  ·  01 Jun 2026

Table extraction should preserve meaning, not just matching strings. This benchmark combines controlled PDFs with an LLM-based semantic assessment that aligns more closely with human judgments than conventional structural metrics.

Achim von Stryk, Janis Keuper
AI for Multimedia Forensics & Disinformation Detection Workshop at ECCV 26  ·  01 Jun 2026

Ordinary smartphone photos are a demanding test for deepfake detectors. LAION-Mobile assembles roughly one million images with camera metadata and reveals serious generalization and threshold-calibration problems in existing detectors.

BioImage Computing Workshop at ECCV 26 logo
Linghui Liu, Henrike Stephani, Jördis Sieburg-Rockel, Stephanie Helmling, Andrea Olbrich, Janis Keuper
BioImage Computing Workshop at ECCV 26  ·  01 Jun 2026

Visual concepts can make biological image classification easier to interpret. This work investigates unsupervised concept bottlenecks as a way to connect bioimage predictions with intermediate visual evidence.

MUCG Workshop at ECCV 26 logo
Bianca Lamm, Janis Keuper
MUCG Workshop at ECCV 26  ·  01 Jun 2026

Rapidly changing product catalogs challenge static prediction models. This work studies how fine-tuning and retrieval-augmented generation can be combined to extract structured information from multimodal retail data.

exCV Workshop at ECCV 26 logo
Katharina Prasse, Margret Keuper
exCV Workshop at ECCV 26  ·  01 Jun 2026

Explanations of abstract classifications need a clear theoretical reference. This position argues for evaluating model explanations against validated, context-specific constructs to make model bias measurable.

Abhay Skaria Thomas, Shashank Agnihotri, Margret Keuper
NeuSLAM Workshop at ECCV 26  ·  01 Jun 2026

A tracker that keeps running may still accumulate serious drift. This study separates tracking failure from trajectory degradation and tests when synthetic corruptions reproduce conclusions drawn from real adverse conditions.

Tejaswini Medi, Hsien-Yi Wang, Arianna Rampini, Margret Keuper
ECCV 26  ·  01 Jun 2026

Sharp details should survive compression into a generative model's latent space. DeBaT learns low- and high-frequency representations separately, improving fine-detail reconstruction while retaining coherent global structure.

Christoph Leiter, Yuki M. Asano, Margret Keuper, Steffen Eger
Transactions of the Association for Computational Linguistics  ·  01 Jun 2026

An image-quality metric should notice when a small prompt change changes the intended meaning. CROC generates contrastive checks at scale, adds a human-supervised benchmark, and uses the resulting data to train a more capable evaluation metric.

Sebastian Sachs, Steffen Jung, Max Kahl, Margret Keuper, Christian Willert, Christian Cierpka
Experiments in Fluids  ·  01 Jun 2026

Event cameras offer a fast, sparse view of moving particles. STELLA unifies alternative detection and tracking pipelines with synthetic and experimental benchmarks for studying detailed motion in fluid flows.

M. Fatima, S. Agnihotri, K. V. Gandikota, M. Moeller, Margret Keuper
Transactions on Machine Learning Research (TMLR)  ·  01 Jun 2026

What useful visual information survives directly in low-bit RAW sensor data? RAWDet-7 benchmarks object detection and description across cameras, environments, and quantization levels, bringing sensor constraints into model evaluation.

Transactions on Machine Learning Research (TMLR) logo
K. Bäuerle, P. Müller, I. Ihrke, Margret Keuper
Transactions on Machine Learning Research (TMLR)  ·  01 Jun 2026

Lens blur is not always a harmless image degradation. Adverse Lens Corruption optimizes physically parameterized aberrations to find difficult optical conditions and test a model's sensitivity to lens tolerances.

Patrick Müller, Alexander Braun, Margret Keuper
IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI)  ·  01 Jun 2026

Camera optics introduce blur that simple synthetic kernels do not capture. OpticsBench and LensCorruptions probe realistic aberrations across classification and detection models, supporting more representative robustness evaluation.

Pius Horn, Janis Keuper
ICPR 2026  ·  01 Jun 2026

A formula can be written differently while retaining exactly the same meaning. This benchmark uses controlled PDF generation and semantic evaluation to compare formula extraction, with human judgments validating the assessment approach.

Janis Keuper
ICPR 2026  ·  01 Jun 2026

Hidden instructions in a paper can distort an automated review. Our experiments examine both prompt-injection susceptibility and acceptance bias in LLM-generated reviews, exposing weaknesses in using these systems for scientific evaluation.

Synthetic Data for Computer Vision Workshop at CVPR 2026 logo
Linghui Liu, Henrike Stephani, Janis Keuper
Synthetic Data for Computer Vision Workshop at CVPR 2026  ·  01 Jun 2026

Does Fréchet Inception Distance preserve a trustworthy ordering outside familiar image distributions? This work examines rank consistency for synthetic out-of-distribution samples, focusing attention on the reliability of generator evaluation.

Yushi Liu, Christian Graf, Markus Spies, Margret Keuper
FGVC13 workshop Efficient Fine-grained Image Retrieval with Vision Foundation Models for Industrial Objects at CVPR 2026  ·  01 Jun 2026

Finding the right spare part requires distinguishing nearly identical objects across viewpoints and backgrounds. A new industrial dataset and lightweight adaptation framework test how foundation-model features can improve this demanding retrieval task.

Martin Spitznagel, Janis Keuper
Transactions on Machine Learning Research (TMLR)  ·  01 Jun 2026

Simple local update rules can produce complex learned behavior. This review organizes neural cellular automata into a unified framework and introduces NCAtorch as a modular reference implementation for reproducible experimentation.

Jan Philip Walter, Shashank Agnihotri, Margret Keuper
ICML Workshops 26  ·  01 Jun 2026

Treat image features as a table and adapt a detector through examples rather than retraining. This approach combines frozen visual features with TabPFN, showing promise when only a few labeled images from a new generator are available.

Janis Keuper, Margret Keuper
ICML 26  ·  01 Jun 2026

Modern phone photographs already contain substantial algorithmic processing. This position paper asks what a "real" image means for deepfake detection and calls for definitions and benchmarks that reflect contemporary photography.

Victor Oei, Jenny Schmalfuss, Lukas Mehl, Madlen Bartsch, Shashank Agnihotri, Margret Keuper, Andreas Bulling, Andres Bruhn
Proceedings of the Nineth International Conference on Learning Representations (ICLR 26)  ·  01 Jun 2026

RobustSpring tests motion and depth estimation under corruptions that remain consistent across time, viewpoints, and scene depth. Its benchmark complements accuracy scores with robustness measurements, exposing weaknesses that clean images can conceal.

Abhipsa Basu, Mohana Singh, Shashank Agnihotri, Margret Keuper, Venkatesh Babu Radhakrishnan
Proceedings of the Nineth International Conference on Learning Representations (ICLR 26)  ·  01 Jun 2026

Generative models can show the world through a narrow set of geographic stereotypes. GeoDiv measures socioeconomic portrayal and visual diversity separately, making these biases more interpretable across countries and image generators.

Bianca Lamm, Janis Keuper
Transactions on Machine Learning Research (TMLR) / presented at ICML 26  ·  01 Jun 2026

Extracting structured product information demands more than reading text. mSOP-765k supplies over 765,000 annotated advertisement images and evaluation tools for comparing multimodal models, including retrieval-augmented approaches.

2025

Shashank Agnihotri, Jonas Jakubassa, Priyam Dey, Sachin Goyal, Bernt Schiele, Venkatesh Babu Radhakrishnan, Margret Keuper
NeurIPS 25 Lock-LLM Workshop  ·  01 Jun 2025

Do safety-training gains survive edits to a model's internal activations? This checkpoint-level study tests refusal behavior before and after abliteration and examines how evaluation judges affect the conclusions.

Achim Eckerle, Martin Spitznage, Janis Keuper
NeurIPS 25 Workshop on UrbanAI  ·  01 Jun 2025

Explore changes to an urban sound map in a fraction of a second. Conditioned normalizing flows learn to predict sound propagation from city layouts, enabling rapid comparison of source and geometry changes.

Yuxuan Zhou, Heng Li, Zhi-Qi Cheng, Xudong Yan, Yifei Dong, Mario Fritz, Margret Keuper
NeurIPS 25, proceedings of the thirty-sixth Conference on Neural Information Processing Systems  ·  01 Jun 2025

Label smoothing can unintentionally reinforce mistakes and collapse feature diversity. MaxSup targets the largest prediction logit instead, preserving richer representations while reducing overconfidence more consistently.

Eyad Alshami, Shashank Agnihotri, Bernt Schiele, Margret Keuper
Proceedings of the IEEE/CVF International Conference on Computer Vision (ICCV 2025)  ·  01 Jun 2025

AIM encourages models to rely on meaningful object features through self-supervised masking. It improves inherent interpretability alongside classification performance without requiring extra region annotations.

Jonas Belouadi, Eddy Ilg, Margret Keuper, Hideki Tanaka, Masao Utiyama, Raj Dabre, Steffen Eger, Simone Paolo Ponzetto
Proceedings of the IEEE/CVF International Conference on Computer Vision (ICCV 2025)  ·  01 Jun 2025

Turn a caption into editable graphics code without requiring aligned caption-program pairs for training. TikZero uses image representations as a bridge between text understanding and graphics-program synthesis, enabling precise, reusable figures.

Lorena Stracke, Lia Nimmermann, Shashank Agnihotri, Margret Keuper, Volker Blanz
Proceedings of the IEEE/CVF International Conference on Computer Vision Workshops (ICCVw 2025)  ·  01 Jun 2025

A different input representation can help vision models cope with darkness. Inspired by retinal processing, fixed color and contrast transformations emphasize structural cues and improve segmentation under difficult lighting.

Tejaswini Medi, Hsien-Yi Wang, Arianna Rampini, Margret Keuper
Proceedings of the IEEE/CVF International Conference on Computer Vision Workshops (ICCVw 2025)  ·  01 Jun 2025

Fine textures can disappear when image tokenizers favor low-frequency structure. This study diagnoses that imbalance and explores separate optimization of frequency bands to preserve sharper details in reconstructed images.

Nicolas Poggi, Shashank Agnihotri, Margret Keuper
Proceedings of the IEEE/CVF International Conference on Computer Vision Workshops (ICCVw 2025)  ·  01 Jun 2025

Specialist imaging tasks often have too few labels for conventional training. We adapt vision-language models to terahertz imagery through modality-aware prompts and in-context examples, exploring classification and interpretation without fine-tuning.

Shashank Agnihotri, Julian Yuya Caspary, Luca Schwarz, Xinyan Gao, Jenny Schmalfuss, Andrés Bruhn, Margret Keuper
Transactions on Machine Learning Research (TMLR)  ·  01 Jun 2025

FlowBench brings systematic robustness testing to optical-flow estimation. Its shared evaluation tools compare models under attacks and distribution shifts, helping researchers assess reliability beyond clean benchmark accuracy.

Yuxuan Zhou, Margret Keuper, Mario Fritz
ACL 25  ·  01 Jun 2025

Choosing a text-sampling method means balancing variety against unreliable continuations. This framework evaluates that trade-off at individual decoding steps and offers practical guidance for selecting truncation methods and parameters.

Katharina Prasse, Patrick Knab, Sascha Marton, Christian Bartelt, Margret Keuper
ICML 25  ·  01 Jun 2025

DCBM builds interpretable classifiers from dataset-specific visual concepts. Foundation-model region extraction makes efficient use of limited examples, while localized concepts help explain predictions in fine-grained and unfamiliar domains.

Martin Spitznagel, Jan Vailant, Janis Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR 2025)  ·  01 Jun 2025

Fast predictions are not enough if a learned simulator gets the physics wrong. PhysicsGen benchmarks generative models on three image-based simulation tasks, making both their speed potential and physical limitations visible.

Bianca Lamm, Janis Keuper
Fine-Grained Visual Categorization Workshop at CVPR 2025  ·  01 Jun 2025

Add new retail products without retraining the classifier. Our visual RAG pipeline retrieves a few relevant examples to guide a vision-language model in predicting product identity, price, and promotion details.

Tejaswini Medi, Arianna Rampini, Pradyumna Reddy, Pradeep Kumar Jayaraman, Margret Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRw 2025)  ·  01 Jun 2025

Generate detailed 3D shapes through compact, multiscale wavelet representations. 3D-WAG predicts progressively finer token maps, reducing the long sequences that make conventional autoregressive 3D generation expensive.

Katharina Prasse, Patrick Knab, Sascha Marton, Christian Bartelt, Margret Keuper
4th Explainable AI for Computer Vision (XAI4CV) Workshop @ CVPR 2025  ·  01 Jun 2025

Interpretable classifiers should not need enormous concept collections. Data-efficient visual concept bottlenecks derive concepts from image regions, supporting fine-grained recognition with concepts that can be localized in new images.

S. Agnihotri, D. Schader, N. Sharei, M. Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRw 2025)  ·  01 Jun 2025

Do artificial corruptions tell us how models will behave in real adverse conditions? This large segmentation study finds useful aggregate correlations while showing why individual corruption types still need careful interpretation.

M. Fatima, S. Jung, M. Keuper
Synthetic Data for Computer Vision Workshop@ CVPR 2025  ·  01 Jun 2025

Move an object away from the center or make it smaller, and a classifier may lean more heavily on its background. Hard-Spurious-ImageNet exposes these interactions and tests whether existing bias-mitigation methods cope with them.

S. Agnihotri, A. Ansari, A. Dackermann, F. Rösch, M. Keuper
Synthetic Data for Computer Vision Workshop@ CVPR 2025  ·  01 Jun 2025

Accurate stereo matching is only part of dependable depth perception. DispBench systematically evaluates disparity models under adversarial attacks and image corruptions, making reliability and generalization easier to compare.

Mario Fernandez,, Matthias Delescluse,, Alain Rabaute, Norman Ettrich, Janis Keuper
Geophysical Prospecting  ·  01 Jun 2025

Train on simulated seismic data, then remove unwanted multiples in field recordings. This study compares training objectives and shows the value of predicting multiples before subtracting them, including under noisy conditions.

Paul Gavrikov, Jovita Lukasik, Steffen Jung, Robert Geirhos, Muhammad Jehanzeb Mirza, Margret Keuper, Janis Keuper
Proceedings of the Nineth International Conference on Learning Representations (ICLR 25)  ·  01 Jun 2025

Can instructions change how a model sees an object? We study texture and shape preferences in vision-language models, revealing both the influence of multimodal training and the limits of steering perception with language.

Yumeng Li, William Beluch, Margret Keuper, Dan Zhang, Anna Khoreva
Proceedings of the Nineth International Conference on Learning Representations (ICLR 25)  ·  01 Jun 2025

Longer generated videos need meaningful change over time. VSTAR combines a sequence of text prompts with temporal-attention regularization to guide pretrained video models toward more dynamic, evolving scenes.

Tejaswini Medi, Steffen Jung, Margret Keuper
WACV 25  ·  01 Jun 2025

Average robustness can hide large differences between classes. FAIR-TAT uses targeted adversarial training to improve the balance of class-wise performance and explore fairer trade-offs on clean and perturbed inputs.

Katharina Prasse, Isaac Bravo, Stefanie Walter, Margret Keuper
WACV 25  ·  01 Jun 2025

Discover recurring visual themes without fixing the number of clusters beforehand. A minimum-cost multicut approach groups images for visual framing analysis and shows how embedding choices expose different levels of thematic detail.

2024

Jovita Lukasik, Michael Moeller, Margret Keuper
International Journal of Computer Vision (IJCV 24)  ·  01 Jun 2024

Can an untrained network reveal how robust it will become? This evaluation finds that robustness prediction is harder than clean-accuracy prediction and benefits from combining several zero-cost architecture proxies.

Paul Gavrikov, Shashank Agnihotri, Margret Keuper, Janis Keuper
NeurIPS 24 Workshop on InterpretableAI  ·  01 Jun 2024

Which layers a network actually needs depends on how it was trained. By resetting layers across differently trained ImageNet models, we reveal substantial changes in where decision-critical information resides.

Lars Nieradzik, Henrike Stephani, Janis Keuper
International Journal of Computer Vision (IJCV 24)  ·  01 Jun 2024

Explanations need reliable evaluation, too. We replace disruptive pixel deletion with adversarial perturbations to assess attribution maps more consistently and reduce the distribution shifts that can distort their rankings.

Kai Bäuerle, Patrick Müller, Syed Muhammad Kazim, Ivo Ihrke, Margret Keuper
Transactions on Machine Learning Research (TMLR)  ·  01 Jun 2024

A single preprocessing layer can recover information that remains useful under image corruptions. With fewer than 2,000 additional weights, this approach learns a simple linear transformation that improves classification stability at low cost.

J. P. Schneider, M. Fatima, J. Lukasik, A. Kolb, Margret Keuper, M. Moeller
ICML 24  ·  01 Jun 2024

Build geometric knowledge directly into an image segmentation. Carefully parameterized implicit representations can enforce properties such as convexity, symmetry, and connectedness, helping resolve difficult or occluded boundaries.

Y. Zhou, Mario Fritz, Margret Keuper
ICML 24  ·  01 Jun 2024

Attention should suppress irrelevant entries without losing several useful alternatives. MultiMax addresses this balance with an adaptive normalization function that preserves multiple modes while encouraging sparsity.

Shashank Agnihotri, Stefen Jung, Margret Keuper
ICML 24  ·  01 Jun 2024

CosPGD provides a common adversarial test for pixel-wise prediction tasks. Its smooth, prediction-alignment weighting produces effective attacks across both classification and regression outputs, from segmentation to optical flow.

Julia Grabinski, Janis Keuper, Margret Keuper
Transactions on Machine Learning Research (TMLR)  ·  01 Jun 2024

How large would convolution filters grow if their size were no longer expensive? Neural Implicit Frequency Filters make this question testable and reveal that many learned filters remain spatially compact even when much larger ones are available.

Paul Gavrikov, Jovita Lukasik, Steffen Jung, Robert Geirhos, Bianca Lamm, Jehanzeb Mirza, Margret Keuper, Janis Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRw 2024)  ·  01 Jun 2024

Language can change which visual cues a multimodal model follows. We measure texture and shape preferences across vision-language models and explore how prompting steers their decisions.

Luisa Schwirten, Jannes Scholz, Daniel Kondermann, Janis Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRw 2024)  ·  01 Jun 2024

Sometimes a difficult label is ambiguous rather than simply wrong. By studying pedestrian annotations, we show how identifying such cases can improve training efficiency and detection performance while preserving dataset representativeness.

Paul Gavrikov, Janis Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR 2024)  ·  01 Jun 2024

Do familiar visual biases explain why some models generalize better? A controlled study of ImageNet models finds that shape and spectral biases alone cannot reliably predict performance across diverse distribution shifts.

Yumeng Li, Dan Zhang, Margret Keuper, Anna Khoreva
International Journal of Computer Vision (IJCV 24)  ·  01 Jun 2024

Style synthesis can prepare segmentation models for places and conditions they have never seen. This extended framework mixes content with styles from both training images and external exemplars, and explores stylized validation data for model selection.

Bianca Lamm, Janis Keuper
DMLR Workshop at International Conference on Learning Representations (ICLR 24)  ·  01 Jun 2024

Recognizing the same product is different from finding products that serve the same purpose. Retail-786k introduces large-scale visual entity matching with real advertisement images, challenging models to transfer product-equivalence concepts to unseen examples.

Martin Spitznagel, Janis Keuper
DMLR Workshop at International Conference on Learning Representations ( 24)  ·  01 Jun 2024

Urban sound propagation turns a complex physical process into a concrete test for generative models. This benchmark pairs city layouts with simulated sound maps, revealing where fast learned predictions capture physics and where they fall short.

Yumeng Li, Margret Keuper, Dan Zhang, Anna Khoreva1
Proceedings of the Nineth International Conference on Learning Representations ( 24)  ·  01 Jun 2024

Generate images that follow a scene layout and remain editable through text. ALDM adds adversarial supervision to diffusion training, improving layout fidelity and making generated scenes useful for segmentation data augmentation.

Lars Nieradzik, Henrike Stephani, Janis Keuper
eCVX Workshop at ECCV 24  ·  01 Jun 2024

Top-GAP encourages a classifier to focus on compact, informative image regions. The resulting representations reduce background dependence while improving interpretability, localization, and robustness.

Bianca Lamm, Janis Keuper
EVAL-FoMo Workshop at ECCV 24  ·  01 Jun 2024

Can one vision-language model replace a carefully engineered retail extraction pipeline? Our case study finds strong performance on some attributes but substantial gaps on fine-grained product identity and discounts, identifying where production challenges remain.

Patrick Grommelt, Louis Weiss, Franz-Josef Pfreundt, Janis Keuper
CEGIS Workshop at ECCV 24  ·  01 Jun 2024

Is an image detector learning synthetic content, or just JPEG compression? We uncover compression and image-size shortcuts in generation-detection datasets and show how removing them changes robustness and cross-generator evaluation.

Shashank Agnihotri, Julia Grabinski, Margret Keuper
Proceedings of the 18th European Conference on Computer Vision (ECCV 24)  ·  01 Jun 2024

Upsampling must recover fine detail while keeping predictions stable. We investigate spectral artifacts and show why access to a larger spatial context matters for robust, high-quality pixel-wise outputs.

2023

Jovita Lukasik, Paul Gavrikov, Janis Keuper, Margret Keuper
Transactions on Machine Learning Research (TMLR)  ·  01 Jun 2023

Encourage robustness directly through the filters a CNN learns. Frequency regularization promotes lower-frequency representations and improves resilience to attacks and distribution shifts without requiring adversarial examples during training.

Ricard Durall, Ammar Ghanim, Norman Ettrich, Janis Keuper
Geophysics - Journal of the Society of Exploration Geophysicists and American Association of Petroleum Geologists  ·  01 Jun 2023

Seismic multiple removal can be simplified with a U-Net trained entirely on synthetic data. Alongside field-data experiments, this study examines hyperparameters and uncertainty to make the model's behavior easier to understand and use.

Shashank Agnihotri, Kanchana Vaishnavi Gandikota, Julia Grabinski, Paramanand Chandramouli, Margret Keuper
Proceedings of the IEEE/CVF International Conference on Computer Vision Workshops (ICCVw 2023)  ·  01 Jun 2023

Strong image-restoration accuracy can conceal severe adversarial vulnerability. We examine restoration transformers and related architectures, then investigate training and design changes that improve their resistance to attacks.

Paul Gavrikov, Janis Keuper
Proceedings of the IEEE/CVF International Conference on Computer Vision Workshops (ICCVw 2023)  ·  01 Jun 2023

The border of an image can expose a hidden architectural weakness. We analyze how convolutional padding shapes adversarial perturbations and how alternative padding choices affect robustness.

Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW 2023) logo
Yumeng Li, Dan Zhang, Margret Keuper, Anna Khoreva
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW 2023)  ·  01 Jun 2023

How can synthetic imagery help assess a segmenter's behavior beyond its training domain? This work investigates synthetic data as a tool for evaluating domain generalization in semantic segmentation.

Yumeng Li, Dan Zhang, Margret Keuper, Anna Khoreva
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW 2023)  ·  01 Jun 2023

Change an image's style without changing its semantic layout. Intra-source style augmentation uses a masked-noise StyleGAN encoder to diversify training scenes and improve segmentation under unfamiliar weather and appearance conditions.

Steffen Jung1, Jovita Lukasik, Margret Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW 2023)  ·  01 Jun 2023

What makes one neural architecture more robust than another? This workshop study introduces robustness evaluations across NAS-Bench-201 and demonstrates their use for architecture search, robustness prediction, and analysis of design choices.

Daniel Ladwig, Bianca Lamm, Janis Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW 2023)  ·  01 Jun 2023

Nearly identical products are hard to distinguish from pictures alone. Our leaflet dataset and multimodal classifier show how combining product imagery with extracted text improves fine-grained retail recognition.

Steffen Jung, Jan Christian Schwedhelm, Claudia Schillings, Margret Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW 2023)  ·  01 Jun 2023

Explore the edge of a generator's training distribution by optimizing its discrete latent space. Using smiling faces as an illustrative test case, our approach combines tree-based optimization with weighted retraining to produce samples with stronger target attributes.

Paul Gavrikov, Janis Keuper, Margret Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW 2023)  ·  01 Jun 2023

Adversarial training can shift image recognition toward the shapes that humans rely on. We examine this effect across architectures and attack settings, using frequency analysis to investigate why more human-like visual preferences emerge.

Ricard Durall, Ammar Ghanim, Mario Fernandez, Norman Ettrich, Janis Keuper
Computers and Geosciences  ·  01 Jun 2023

Can a generative model become a versatile seismic-processing tool? We investigate diffusion models for multiple removal, denoising, and interpolation, comparing their behavior on synthetic and field data with established methods.

Steffen Jung, Jovita Lukasik, Margret Keuper
Proceedings of the Tenth International Conference on Learning Representations ( 23)  ·  01 Jun 2023

Architecture design has a measurable impact on robustness, even at similar parameter counts. This dataset evaluates NAS-Bench-201 architectures under attacks and corruptions, enabling repeatable searches for networks that are both accurate and resilient.

2022

Amrutha Saseendran, Kathrin Skubch, Margret Keuper
NeurIPS 22, proceedings of the thirty-sixth Conference on Neural Information Processing Systems  ·  01 Jun 2022

Better robustness does not have to come at the expense of generated-image quality. We regularize deterministic autoencoders using perturbed examples and latent-distribution comparisons to improve both representation stability and synthesis fidelity.

Julia Grabinski, Paul Gavrikov, Janis Keuper, Margret Keuper
NeurIPS 22, proceedings of the thirty-sixth Conference on Neural Information Processing Systems  ·  01 Jun 2022

Robustness training can also improve how cautiously a model makes predictions. This study examines the lower overconfidence of adversarially trained networks and the influence of activation functions and pooling on confidence.

Patrick Müller, Alexander Braun, Margret Keuper
NeurIPS 2022 Workshop on Distribution Shifts - Connecting Methods and Applications  ·  01 Jun 2022

Real lenses produce more complex blur than standard corruption benchmarks assume. We evaluate direction- and wavelength-dependent optical effects, exposing classification changes that simpler blur tests can miss.

Paul Gavrikov, Janis Keuper
NeurIPS 22 Workshop - Medical Imaging meets NeurIPS  ·  01 Jun 2022

Do medical images require fundamentally different convolution filters? A closer look shows that apparent outliers largely reflect architectural processing choices, supporting the value of diverse pretraining data across image domains.

Paula Harder, Duncan Watson-Parris, Philip Stier, Dominik Strassel, Nicolas R Gauger, Janis Keuper
Environmental Data Science Journal  ·  01 Jun 2022

Climate models need detailed aerosol physics without prohibitive simulation costs. Our neural emulator accelerates aerosol microphysics while incorporating physical constraints to improve mass conservation and positivity.

Jovita Lukasik, Steffen Jung, Margret Keuper
ECCV 2022 - Proceedings of the 17th European Conference, Tel Aviv, Israel  ·  01 Jun 2022

Instead of repeatedly searching unpromising architectures, learn where good candidates are likely to be. AG-Net combines a generator with a performance predictor to guide efficient search, including joint optimization of accuracy and hardware latency.

Julia Grabinski, Steffen Jung, Janis Keuper, Margret Keuper
ECCV 2022 - Proceedings of the 17th European Conference, Tel Aviv, Israel  ·  01 Jun 2022

A small change to downsampling can make adversarial training more stable. FrequencyLowCut pooling removes aliasing and helps prevent catastrophic overfitting during fast, single-step adversarial training.

Paul Gavrikov, Janis Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR 2022)  ·  01 Jun 2022

CNN Filter DB makes more than a billion learned filters available for studying what neural networks learn. Its analysis reveals both shared filter statistics across tasks and degenerate filters that can undermine robustness and transfer learning.

Paul Gavrikov, Janis Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW 2022)  ·  01 Jun 2022

Robustness leaves a signature in learned convolution filters. By comparing adversarially trained networks with standard models, we uncover changes in filter diversity, sparsity, and early-layer filtering that help explain their different behavior.

Julia Grabinski, Janis Keuper, Margret Keuper
Machine Learning, Springer 2022  ·  01 Jun 2022

Aliasing reveals when adversarial training starts to lose its robustness. This extended study connects downsampling artifacts to robust overfitting and proposes an aliasing-based early-stopping criterion.

Evgeny Levinkov, Amirhossein Kardoost, Bjoern Andres, Margret Keuper
IEEE Transactions on Pattern Analysis and Machine Intelligence  ·  01 Jun 2022

Grouping points into lines, motions, or geometric transformations requires relationships beyond pairs. Our higher-order multicut formulation captures these relationships and provides an efficient local-search solver without fixing the number of groups in advance.

Arber Zela, Julien Niklas Siems, Lucas Zimmer, Jovita Lukasik, Margret Keuper, Frank Hutter
Proceedings of the Tenth International Conference on Learning Representations ( 22)  ·  01 Jun 2022

Evaluating architecture-search methods need not require training every candidate network. Learned surrogate benchmarks make large search spaces accessible at a fraction of the cost, supporting more realistic and reproducible NAS comparisons.

Julia Grabinski, Paul Gavrikov, Janis Keuper, Margret Keuper
ICML 22 Workshop on NEW FRONTIERS IN ADVERSARIAL MACHINE LEARNING  ·  01 Jun 2022

Adversarial training changes more than resistance to attacks. Our experiments show that robust models can also be less overconfident on clean inputs, with architecture choices influencing their prediction confidence.

Peter Lorenz, Dominik Strassel, Margret Keuper, Janis Keuper
The AAAI-22 Workshop on Adversarial Machine Learning and Beyond  ·  01 Jun 2022

A high robustness score is only useful when the benchmark reflects the intended threat. We examine the detectability and resolution dependence of AutoAttack perturbations, questioning how far common benchmark rankings transfer to practical settings.

Julia Grabinski, Janis Keuper, Margret Keuper
The AAAI-22 Workshop on Adversarial Machine Learning and Beyond  ·  01 Jun 2022

Downsampling artifacts offer a revealing clue to adversarial vulnerability. This study shows that robust CNNs learn to downsample more accurately and exhibit less aliasing than their standard counterparts.

2021

Steffen Jung, Margret Keuper
AAAI  ·  01 Jun 2021

Convincing images should have convincing frequency statistics, too. A lightweight spectral discriminator helps GANs match real-image spectra and reduces the frequency artifacts that can expose generated content.

Amrutha Saseendran, Kathrin Skubch, Margret Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR 2021)  ·  01 Jun 2021

Tell a generator how many objects of each class to include. Our count-conditioned GAN combines image synthesis with object counting, enabling explicit control over scene composition even against complex backgrounds.

Paul Gavrikov, Janis Keuper
NeurIPS 21 Workshop - Distribution shifts - connecting methods and applications (DistShift)  ·  01 Jun 2021

What changes inside a CNN when its training data or task changes? This early study compares more than half a billion learned convolution filters, opening a new window onto transfer learning and distribution shifts through model weights.

Amrutha Saseendran, Kathrin Skubch, Stefan Falkner, Margret Keuper
NeurIPS 21, proceedings of the thirty-sixth Conference on Neural Information Processing Systems  ·  01 Jun 2021

Shape your Space gives deterministic autoencoders an expressive, multimodal latent distribution during training. This makes sampling straightforward while avoiding a separate density-fitting step after training.

Jovita Lukasik, David Friede, Arber Zela, Frank Hutter, Margret Keuper
Proceedings of the Nineth International Conference on Learning Representations (ICLR 21)  ·  01 Jun 2021

Searching for better networks starts with a useful representation of their architectures. SVGe learns a smooth graph embedding that reconstructs architectures accurately and supports efficient performance prediction and search.

2020

Valentin Tschannen, Matthias Delescluse, Norman Ettrich, Janis Keuper
Geophysical Prospecting  ·  01 Jun 2020

Weak diffraction signals can reveal geological details that conventional reflections miss. This work combines diffraction imaging with a CNN trained on synthetic examples to locate subsurface scattering points, including challenging signals in field data.

Valentin Tschannen, Matthias Delescluse, Norman Ettrich, Janis Keuper
Geophysics - Journal of the Society of Exploration Geophysicists and American Association of Petroleum Geologists  ·  01 Jun 2020

Picking geological horizons becomes more manageable when it is treated as a 3D segmentation problem. Our network learns from sparse interpreter annotations and can be refined interactively to trace complex reflection surfaces in seismic volumes.

Ricard Durall, Margret Keuper, Janis Keuper
Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR 2020)  ·  01 Jun 2020

Why do generated images leave detectable frequency fingerprints? We trace these artifacts to common upsampling operations and introduce spectral regularization that helps generators better reproduce natural-image statistics.

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