Coarse-to-fine information integration in human vision

Kirsten Petras*, Sanne ten Oever, Christianne Jacobs, Valerie Goffaux

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

22 Citations (Web of Science)

Abstract

Coarse-to-fine theories of vision propose that the coarse information carried by the low spatial frequencies (LSF) of visual input guides the integration of finer, high spatial frequency (HSF) detail. Whether and how LSF modulates HSF processing in naturalistic broad-band stimuli is still unclear. Here we used multivariate decoding of EEG signals to separate the respective contribution of LSF and HSF to the neural response evoked by broad-band images. Participants viewed images of human faces, monkey faces and phase-scrambled versions that were either broad-band or filtered to contain LSF or HSF. We trained classifiers on EEG scalp-patterns evoked by filtered scrambled stimuli and evaluated the derived models on broad-band scrambled and intact trials. We found reduced HSF contribution when LSF was informative towards image content, indicating that coarse information does guide the processing of fine detail, in line with coarse-to-fine theories. We discuss the potential cortical mechanisms underlying such coarse-to-fine feedback.

Original languageEnglish
Pages (from-to)103-112
Number of pages10
JournalNeuroimage
Volume186
DOIs
Publication statusPublished - 1 Feb 2019

Keywords

  • Spatial frequency
  • Coarse-to-fine
  • Electroencephalography
  • Multivariate decoding
  • Temporal generalization
  • Human face perception
  • SPATIAL-FREQUENCY INFORMATION
  • DOWN FACILITATION
  • REACTION-TIMES
  • FACE
  • CATEGORIZATION
  • PERCEPTION
  • DYNAMICS
  • LATENCY
  • SYSTEM
  • ONSET

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