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Konstantinos Kamnitsas

10 accepted papers

2026

The Invisible Gorilla Effect in Out-of-distribution Detection

CVPR 2026

Deep Neural Networks achieve high performance in vision tasks by learning features from regions of interest (ROI) within images, but their performance degrades when deployed on out-of-distribution (OOD) data that differs from training data. This challenge has led to OOD detection methods that aim to

Cited by 0SourcecodeScholar
2026

You Point, I Learn: Online Adaptation of Interactive Segmentation Models for Handling Distribution Shifts in Medical Imaging

ICLR 2026poster

Interactive segmentation uses real-time user inputs, such as mouse clicks, to iteratively refine model predictions. Although not originally designed to address distribution shifts, this paradigm naturally lends itself to such challenges. In medical imaging, where distribution shifts are common, inte…

Cited by 0SourcecodeScholar
2025

DIsoN: Decentralized Isolation Networks for Out-of-Distribution Detection in Medical Imaging

NeurIPS 2025poster

Safe deployment of machine learning (ML) models in safety-critical domains such as medical imaging requires detecting inputs with characteristics not seen during training, known as out-of-distribution (OOD) detection, to prevent unreliable predictions. Effective OOD detection after deployment could…

Cited by 0SourcecodeScholar
2025

F^3OCUS - Federated Finetuning of Vision-Language Foundation Models with Optimal Client Layer Updating Strategy via Multi-objective Meta-Heuristics

CVPR 2025highlight

Effective training of large Vision-Language Models (VLMs) on resource-constrained client devices in Federated Learning (FL) requires the usage of parameter-efficient fine-tuning (PEFT) strategies. To this end, we demonstrate the impact of two factors, viz., client-specific layer importance score tha…

2025

FedPIA – Permuting and Integrating Adapters Leveraging Wasserstein Barycenters for Finetuning Foundation Models in Multi-Modal Federated Learning

AAAI 2025technical

Large Vision-Language Models (VLMs), possessing millions or billions of parameters, typically require large text and image datasets for effective fine-tuning. However, collecting data from various sites, especially in healthcare, is challenging due to strict privacy regulations. An alternative is to…

2025

Incongruent Multimodal Federated Learning for Medical Vision and Language-based Multi-label Disease Detection

AAAI 2025technical

Federated Learning (FL) in healthcare ensures patient privacy by allowing hospitals to collaboratively train machine learning models while keeping sensitive medical data secure and localized. Most existing research in FL has concentrated on unimodal scenarios, where all healthcare institutes share t…

Cited by 0SourcePDFScholar
2025

SPA: Efficient User-Preference Alignment against Uncertainty in Medical Image Segmentation

ICCV 2025poster

Medical image segmentation data inherently contain uncertainty. This can stem from both imperfect image quality and variability in labeling preferences on ambiguous pixels, which depend on annotator expertise and the clinical context of the annotations. For instance, a boundary pixel might be labele…

2020

Stochastic Segmentation Networks: Modelling Spatially Correlated Aleatoric Uncertainty

NeurIPS 2020poster

In image segmentation, there is often more than one plausible solution for a given input. In medical imaging, for example, experts will often disagree about the exact location of object boundaries. Estimating this inherent uncertainty and predicting multiple plausible hypotheses is of great interest…

2019

Domain Generalization via Model-Agnostic Learning of Semantic Features

NeurIPS 2019poster

Generalization capability to unseen domains is crucial for machine learning models when deploying to real-world conditions. We investigate the challenging problem of domain generalization, i.e., training a model on multi-domain source data such that it can directly generalize to target domains with…

2018

Semi-Supervised Learning via Compact Latent Space Clustering

ICML 2018oral

We present a novel cost function for semi-supervised learning of neural networks that encourages compact clustering of the latent space to facilitate separation. The key idea is to dynamically create a graph over embeddings of labeled and unlabeled samples of a training batch to capture underlying s…

Cited by 109SourcePDFScholar