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Journal Articles Current Opinion in Behavioral Sciences Year : 2019

Central mechanisms of perceptual filling-in

Abstract

Human observers generally perceive a stable and coherent visual scene despite the fact that sensory information is ambiguous and often incomplete. Perceptual filling-in provides an interesting example of how the visual system realizes perceptual inferences from incomplete information. Vision scientists have a long history studying filling-in phenomena in the context of surface color filling-in. While significant progress has been achieved with behavioral experiments, little is known about the neural substrate of perceptual filling-in. We explored several hypotheses that have been considered to determine how the neural representation of edge-induced filling-in percepts arises in the brain. We argue that the visual system uses distinct extra-striate pathways for the processing of chromatic surfaces generated by edge-dependent filling-in that indirectly influence color pathways via a contour integration mechanism. Such a mechanism may play an important role in figure/ground segregation. Finally, we highlight the potential role of feedback projections that are ignored in many models despite the fact that they are as numerous as feedforward projections.

Dates and versions

hal-02299806 , version 1 (30-09-2019)

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Frédéric Devinck, Kenneth Knoblauch. Central mechanisms of perceptual filling-in. Current Opinion in Behavioral Sciences, 2019, 30, pp.135-140. ⟨10.1016/j.cobeha.2019.08.003⟩. ⟨hal-02299806⟩
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