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20242026
most citedBreaking reCAPTCHAv2

17 citations · 18 across the 19 of their papers we have counts for

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9 papers · 1 filter

cs.CV2026

GIC-DLC: Differentiable Logic Circuits for Hardware-Friendly Grayscale Image Compression

Till Aczel, David F. Jenny, Simon Bührer +3

Neural image codecs achieve higher compression ratios than traditional hand-crafted methods such as PNG or JPEG-XL, but often incur substantial computational overhead, limiting the…

cs.CV2025★ 1 cited

The Impact of Scaling Training Data on Adversarial Robustness

Marco Zimmerli, Andreas Plesner, Till Aczel +1

Deep neural networks remain vulnerable to adversarial examples despite advances in architectures and training paradigms. We investigate how training data characteristics affect adv…

cs.CV2025

The Unwinnable Arms Race of AI Image Detection

Till Aczel, Lorenzo Vettor, Andreas Plesner +1

The rapid progress of image generative AI has blurred the boundary between synthetic and real images, fueling an arms race between generators and discriminators. This paper investi…

cs.CV2025

Keep It Real: Challenges in Attacking Compression-Based Adversarial Purification

Samuel Räber, Till Aczel, Andreas Plesner +1

Previous work has suggested that preprocessing images through lossy compression can defend against adversarial perturbations, but comprehensive attack evaluations have been lacking…

cs.CV2025

FLIP Reasoning Challenge

Andreas Plesner, Turlan Kuzhagaliyev, Roger Wattenhofer

Over the past years, advances in artificial intelligence (AI) have demonstrated how AI can solve many perception and generation tasks, such as image classification and text writing…

cs.CV2025

Human Aligned Compression for Robust Models

Samuel Räber, Andreas Plesner, Till Aczel +1

Adversarial attacks on image models threaten system robustness by introducing imperceptible perturbations that cause incorrect predictions. We investigate human-aligned learned los…

cs.CV2025

Synthetic Data for Blood Vessel Network Extraction

Joël Mathys, Andreas Plesner, Jorel Elmiger +1

Blood vessel networks in the brain play a crucial role in stroke research, where understanding their topology is essential for analyzing blood flow dynamics. However, extracting de…

cs.CV2024★ 17 cited

Breaking reCAPTCHAv2

Andreas Plesner, Tobias Vontobel, Roger Wattenhofer

Our work examines the efficacy of employing advanced machine learning methods to solve captchas from Google's reCAPTCHAv2 system. We evaluate the effectiveness of automated systems…

cs.CV2024

Seeing Through the Mask: Rethinking Adversarial Examples for CAPTCHAs

Yahya Jabary, Andreas Plesner, Turlan Kuzhagaliyev +1

Modern CAPTCHAs rely heavily on vision tasks that are supposedly hard for computers but easy for humans. However, advances in image recognition models pose a significant threat to…