Foveated metamers of the early visual system

Humans and models match in discriminating visual features with pooling windows scaled to about one-fourth in luminance compared to spectral energy across large stimuli.

• Why it matters: Understanding how visual discrimination declines with eccentricity helps clarify the limits of human perception and improves models of early visual processing, addressing gaps in spatial feature representation.
• What they did: Researchers used perceptual experiments with large synthetic stimuli, varying pooling window sizes for luminance and spectral energy features, to identify the critical scaling where human and model performance align.
• The result: Findings reveal that critical scaling differs significantly between features and depends on image statistics, comparison type, and synthesis initialization, advancing insights into perceptual representations and model alignment.