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TabPFN has recently gained attention as a foundation model for tabular datasets, achieving strong performance by leveraging in-context learning on synthetic data. However, we find that TabPFN is vulnerable to label shift, often overfitting…

Machine Learning · Computer Science 2026-05-26 Seunghan Lee

While most ML models expect independent and identically distributed data, this assumption is often violated in real-world scenarios due to distribution shifts, resulting in the degradation of machine learning model performance. Until now,…

Machine Learning · Computer Science 2024-11-19 Kai Helli , David Schnurr , Noah Hollmann , Samuel Müller , Frank Hutter

This paper introduces TempSamp-R1, a new reinforcement fine-tuning framework designed to improve the effectiveness of adapting multimodal large language models (MLLMs) to video temporal grounding tasks. We reveal that existing reinforcement…

Computer Vision and Pattern Recognition · Computer Science 2025-09-26 Yunheng Li , Jing Cheng , Shaoyong Jia , Hangyi Kuang , Shaohui Jiao , Qibin Hou , Ming-Ming Cheng

Recent advancements in video saliency prediction (VSP) have shown promising performance compared to the human visual system, whose emulation is the primary goal of VSP. However, current state-of-the-art models employ spatio-temporal…

Computer Vision and Pattern Recognition · Computer Science 2024-04-05 Morteza Moradi , Mohammad Moradi , Francesco Rundo , Concetto Spampinato , Ali Borji , Simone Palazzo

The long-standing dominance of gradient-boosted decision trees for tabular data has recently been challenged by in-context learning tabular foundation models. In-context learning methods fit and predict in one forward pass without parameter…

Machine Learning · Computer Science 2026-02-06 Guri Zabërgja , Rafiq Kamel , Arlind Kadra , Christian M. M. Frey , Josif Grabocka

The long-standing dominance of gradient-boosted decision trees on tabular data is currently challenged by tabular foundation models using In-Context Learning (ICL): setting the training data as context for the test data and predicting in a…

Machine Learning · Computer Science 2025-05-27 Jingang Qu , David Holzmüller , Gaël Varoquaux , Marine Le Morvan

Time-series foundation models (TSFMs) have demonstrated strong generalization capabilities across diverse datasets and tasks. However, existing foundation models are typically pre-trained to enhance performance on specific tasks and often…

Machine Learning · Computer Science 2026-02-25 Shangqing Xu , Harshavardhan Kamarthi , Haoxin Liu , B. Aditya Prakash

Revealing novel insights from the relationship between molecular measurements and pathology remains a very impactful application of machine learning in biomedicine. Data in this domain typically contain only a few observations but thousands…

Machine Learning · Computer Science 2026-03-31 Christopher Kolberg , Jules Kreuer , Jonas Huurdeman , Sofiane Ouaari , Katharina Eggensperger , Nico Pfeifer

While tabular classification has traditionally relied on from-scratch training, a recent breakthrough called prior-data fitted networks (PFNs) challenges this approach. Similar to large language models, PFNs make use of pretraining and…

Tabular datasets are inherently heterogeneous, presenting significant challenges for developing pre-trained foundation models. The recently introduced transformer-based Tabular Prior-data Fitted Network v2 (TabPFN v2) achieves unprecedented…

Machine Learning · Computer Science 2025-06-12 Han-Jia Ye , Si-Yang Liu , Wei-Lun Chao

Tabular data remain the predominant format for real-world applications. Yet, developing effective neural models for tabular data remains challenging due to heterogeneous feature types and complex interactions occurring at multiple scales.…

Artificial Intelligence · Computer Science 2025-11-10 Mohamed Bouadi , Pratinav Seth , Aditya Tanna , Vinay Kumar Sankarapu

Tracking Any Point (TAP) has emerged as a fundamental tool for video understanding. Current approaches adapt Vision Foundation Models (VFMs) like DINOv2 via offline finetuning or test-time optimization. However, these VFMs rely on static…

Computer Vision and Pattern Recognition · Computer Science 2026-03-19 Qiangqiang Wu , Tianyu Yang , Bo Fang , Jia Wan , Matias Di Martino , Guillermo Sapiro , Antoni B. Chan

Variational Information Pursuit (V-IP) is a framework for making interpretable predictions by design by sequentially selecting a short chain of task-relevant, user-defined and interpretable queries about the data that are most informative…

Machine Learning · Computer Science 2023-08-25 Kwan Ho Ryan Chan , Aditya Chattopadhyay , Benjamin David Haeffele , Rene Vidal

Prompt tuning, which involves training a small set of parameters, effectively enhances the pre-trained Vision-Language Models (VLMs) to downstream tasks. However, they often come at the cost of flexibility and adaptability when the tuned…

Computer Vision and Pattern Recognition · Computer Science 2024-07-08 Mushui Liu , Bozheng Li , Yunlong Yu

Large language models (LLMs) process entire input contexts indiscriminately, which is inefficient when the information required to answer a query is localized within the context. We present dynamic context cutoff, a novel method enabling…

Computation and Language · Computer Science 2026-02-10 Roy Xie , Junlin Wang , Paul Rosu , Chunyuan Deng , Bolun Sun , Zihao Lin , Bhuwan Dhingra

Pretrained vision-language models (VLMs) such as CLIP have shown impressive generalization capability in downstream vision tasks with appropriate text prompts. Instead of designing prompts manually, Context Optimization (CoOp) has been…

Computer Vision and Pattern Recognition · Computer Science 2023-02-15 Chengcheng Ma , Yang Liu , Jiankang Deng , Lingxi Xie , Weiming Dong , Changsheng Xu

In this study, we investigate the task of data pre-selection, which aims to select instances for labeling from an unlabeled dataset through a single pass, thereby optimizing performance for undefined downstream tasks with a limited…

Computer Vision and Pattern Recognition · Computer Science 2023-07-24 Xin Li , Sima Behpour , Thang Doan , Wenbin He , Liang Gou , Liu Ren

Frontier AI models have achieved remarkable progress, yet recent studies suggest they struggle with compositional reasoning, often performing at or below random chance on established benchmarks. We revisit this problem and show that widely…

Artificial Intelligence · Computer Science 2026-04-27 Yinglun Zhu , Jiancheng Zhang , Fuzhi Tang

Parameter-efficient fine-tuning (PEFT) of vision-language models (VLMs) excels in various vision tasks thanks to the rich knowledge and generalization ability of VLMs. However, recent studies revealed that such fine-tuned VLMs are…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Nayeong Kim , Seong Joon Oh , Suha Kwak

Vision-Language Models (VLMs) demand substantial computational resources during inference, largely due to the extensive visual input tokens for representing visual information. Previous studies have noted that visual tokens tend to receive…

Computer Vision and Pattern Recognition · Computer Science 2025-04-01 Cheng Yang , Yang Sui , Jinqi Xiao , Lingyi Huang , Yu Gong , Chendi Li , Jinghua Yan , Yu Bai , Ponnuswamy Sadayappan , Xia Hu , Bo Yuan