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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.
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Contributor : Frederic Devinck Connect in order to contact the contributor
Submitted on : Monday, September 30, 2019 - 9:52:24 AM
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Frédéric Devinck, Kenneth Knoblauch. Central mechanisms of perceptual filling-in. Current Opinion in Behavioral Sciences, Elsevier, 2019, 30, pp.135-140. ⟨10.1016/j.cobeha.2019.08.003⟩. ⟨hal-02299806⟩



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