arXiv AI

Measure Less, Know More: Self-Supervised Test-Time Feature Acquisition

The paper introduces ECHO-$k$, a self-supervised, task-agnostic method for selecting which modalities to acquire at test time in multimodal, high-dimensional learning. By using a deep model’s pretrained representations as proxy targets, ECHO-$k$ learns a reinforcement‑learning policy that sequentially chooses informative modalities, providing theoretical guarantees in a linear setting. Experiments show that ECHO-$k$ consistently improves budgeted downstream performance across various foundation‑model backends, offering a principled approach to cost‑aware test‑time deployment when measurements are expensive or time‑constrained.

arXiv Machine Learning
Sep 22

Generalized Multimodal Foundation Model

The paper introduces a generalized multimodal foundation model that can handle arbitrary combinations of modalities and prediction tasks. It trains on large-scale synthetic multimodal datasets with diverse causal structures to learn transferable multimodal correlations. Experiments on 18 real-world datasets across 12 modalities and 11 tasks show competitive performance compared to specialized models without task-specific adaptation.

By Huizi Cui, Zongbo Han, Chenggong Ding, Naichuan Xiao, Jialong Yang, Jingdong Chen, Guangyu Wang, Qinghua Hu, Changqing Zhang
arXiv Machine Learning
Aug 14

MAG: MAnifold Guided Semi-Supervised Multi-modal In-Context Learning

arXiv:2608. 12724v1 Announce Type: new Abstract: Few-shot in-context learning (ICL) with multi-modal large language models (MLLMs) enables task adaptation without parameter updates, but its performance is highly sensitive to the quality and coverage of the selected demonstrations.

By Zirui Cheng, Xun Xu, Tiankai Chen, Fady Rezk, Bowen Zheng, Xiaodong Shi, Shijie Li, Kangkang Lu, Bharadwaj Veeravalli, Nancy F. Chen
arXiv AI
Jun 15

Learning What to Predict: Downstream-Guided Task Design for Continued Pretraining

arXiv:2601. 22108v2 Announce Type: replace-cross Abstract: Continued pretraining is optimized with fixed self-supervised tasks but selected by downstream performance, creating a coarse feedback loop in which practitioners evaluate checkpoints, change data mixtures or objectives, and restart runs, while individual updates remain blind to target capabilities.

By Shuqi Ke, Giulia Fanti
arXiv AI
Sep 30

AdaKerNet: Neural Kernel Decoding for Task-Adaptive Prediction with Multimodal Large Models

AdaKerNet is a task‑adaptive neural kernel decoder that operates on frozen multimodal representations from large foundation models, without requiring access to the models’ parameters. It learns Lipschitz‑controlled multimodal features, a reference kernel providing a soft structural prior, and a lightweight nonlinear predictor that deforms this structure. Experiments on four multimodal large language models and diverse input modalities show consistent improvements over baseline decoders, achieving up to 41% error reduction in scarce‑label settings.

By Konstantinos D. Polyzos, Eleni Oikonomou, Tara Javidi