Title: When the Brain Sees Beyond Pixels: Creative Brain-to-Vision Reconstruction
Primary area: applications to neuroscience & cognitive science
Keywords: Brain-to-vision mapping, frequency-domain modeling, creative image reconstruction, brain-inspired intelligence, multimodal alignment, neural signal representation

Abstract: Reconstructing images from fMRI has traditionally been framed as maximizing pixel fidelity to visual input. While useful for benchmarking, this perspective overlooks what brain signals truly encode: not only perception, but also abstraction, semantics, and imagination. We introduce a frequency-informed framework for brain-to-vision generation that shifts the objective from replication to creative alignment across neural and visual domains. Our method applies graph spectral transforms to fMRI signals and masked frequency modeling to images, enabling coarse-to-fine reconstruction by selectively aligning low-, mid-, and high-frequency structures. To ground generation in meaning, we incorporate semantic priors via CLIP-text embeddings and multi-level visual features, with attention mechanisms that allow frequency-masked brain signals to interact with both reconstructions and textual cues. The model integrates pretrained VDVAE, CLIP, and diffusion backbones, while introducing three novel frequency-aligned projection layers: (i) a low-level hierarchical brain-to-vision layer, (ii) a high-level semantic brain-to-vision layer, and (iii) a brain-to-text alignment layer. The resulting generations may deviate from pixel-level ground truth yet capture emergent structures that show how the brain creatively encodes and reinterprets visual experience. By bridging frequency structures across neural, visual, and semantic modalities, our approach reframes fMRI-to-image reconstruction as a study of how humans perceive, imagine, and create, beyond simple replication.

TL;DR: We propose a frequency-informed framework for brain-to-vision generation that shifts the focus from reconstruction fidelity toward capturing the richer dimensions of human brain vision.