Author

Xiaochuan Ma

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Preprint Aug 2026

SUGFW+: An Uncertainty-guided Feature Weighting Framework for Cold Start Active Adaptation of SAM in Medical Image Segmentation

An extended SAM-based Uncertainty-guided Feature Weighting (SUGFW+) framework for CSAL and adaptation of SAM that leverages the SAM for Patch-level Feature and Uncertainty Calculation (PFUC), and introduces a Patch-based Global Distinct Representation (PGDR) module that aggregates patch-level embeddings into highly dis...

Xiaochuan Ma, Ning Zhu, Jia Fu et al. · 1 citation

Preprint Aug 2026

One Knob to Rule Them All: A Unified Optimal Transport View of Cold-Start Active Learning

A theoretical analysis that characterizes the trade-off controlled by entropic regularization and establishes a task-agnostic minimax bound for cold-start selection and a novel Sinkhorn-based CSAL algorithm, termed $\epsilon$-Adaptive Selection ($\epsilon$-AS).

Ning Zhu, Xiaochuan Ma, Jun-Tao Xu et al. · 0 citations