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MindAligner: Explicit Brain Functional Alignment for Cross-Subject Visual Decoding from Limited fMRI Data

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arxiv 2502.05034 v1 pith:RGTK2FHI submitted 2025-02-07 cs.CV

MindAligner: Explicit Brain Functional Alignment for Cross-Subject Visual Decoding from Limited fMRI Data

classification cs.CV
keywords brainalignmentdecodingfunctionalcross-subjectfmrimindalignervisual
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Brain decoding aims to reconstruct visual perception of human subject from fMRI signals, which is crucial for understanding brain's perception mechanisms. Existing methods are confined to the single-subject paradigm due to substantial brain variability, which leads to weak generalization across individuals and incurs high training costs, exacerbated by limited availability of fMRI data. To address these challenges, we propose MindAligner, an explicit functional alignment framework for cross-subject brain decoding from limited fMRI data. The proposed MindAligner enjoys several merits. First, we learn a Brain Transfer Matrix (BTM) that projects the brain signals of an arbitrary new subject to one of the known subjects, enabling seamless use of pre-trained decoding models. Second, to facilitate reliable BTM learning, a Brain Functional Alignment module is proposed to perform soft cross-subject brain alignment under different visual stimuli with a multi-level brain alignment loss, uncovering fine-grained functional correspondences with high interpretability. Experiments indicate that MindAligner not only outperforms existing methods in visual decoding under data-limited conditions, but also provides valuable neuroscience insights in cross-subject functional analysis. The code will be made publicly available.

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Forward citations

Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. NeuroFlow: Toward Unified Visual Encoding and Decoding from Neural Activity

    cs.LG 2026-04 unverdicted novelty 7.0

    NeuroFlow is the first unified flow model for bidirectional visual encoding and decoding from neural activity using NeuroVAE and cross-modal flow matching.

  2. Fast Whole-Brain, Geometry-Aware Functional Alignment for Cross-Subject Decoding

    q-bio.NC 2026-07 conditional novelty 6.5

    SpectralOT regularizes entropic optimal transport with the first three Laplace-Beltrami eigenmodes of cortical geometry to produce fast, parsimonious whole-brain functional alignments that improve cross-subject decoding.

  3. Meta-learning In-Context Enables Training-Free Cross Subject Brain Decoding

    cs.LG 2026-04 unverdicted novelty 6.0

    A meta-optimized in-context learning approach enables training-free cross-subject semantic visual decoding from fMRI by inferring individual neural encoding patterns via hierarchical inference on a few examples.

  4. Spiking Neural Networks for fMRI-Based Visual Semantic Decoding

    cs.NE 2026-07 conditional novelty 5.0

    Spiking-neural-network image features are more predictable from fMRI activity under a fixed linear decoder than ResNet-18 features, but the effect is inflated by feature-scale differences.

  5. MindAU: EEG-Conditioned Facial Action Unit Editing via Dual-Stream Manifold Alignment

    cs.CV 2026-07 unverdicted novelty 5.0

    MindAU is a dual-stream manifold alignment system that conditions a multimodal diffusion editor on EEG signals to perform fine-grained, identity-preserving facial action unit edits.

  6. StableMind: Source-Free Cross-Subject fMRI Decoding with Regularized Adaptation

    cs.CV 2026-05 unverdicted novelty 5.0

    StableMind achieves source-free cross-subject fMRI decoding via ridge-projection priors, Fourier brain augmentation, and difficulty-aware image blur, reaching 84.02% image and 81.66% brain retrieval accuracy on the Na...

  7. Dual-Stream EEG Decoding for 3D Visual Perception

    cs.CV 2026-06 unverdicted novelty 4.0

    Dual-stream EEG decoder separates identity and orientation to support 3D reconstruction from neural signals via circular regression and conditioned diffusion.