Central mechanisms of perceptual filling-in

Devinck, Frédéric; Knoblauch, Kenneth

doi:10.1016/j.cobeha.2019.08.003

Cited by 11 publications

(10 citation statements)

References 74 publications

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“…Consequently, this computational design can explain the results in [ 42 ], which conclude that while V1 activity is insufficient to explain the perception of filled objects, filling-in processes that occur at both low and high levels can produce the perception of filled objects. Experimental studies on filling-in are consistent with these ideas, as neural activities in V3 and V4 areas during perceptual filling-in effects were observed in response to the watercolor and Cornsweet illusions, texture, and afterimage filling-in [ 57 – 60 ].…”

Section: Discussionmentioning

confidence: 72%

Computational modeling of color perception with biologically plausible spiking neural networks

Cohen-Duwek

Slovin²,

Tsur³

2022

PLoS Comput Biol

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Biologically plausible computational modeling of visual perception has the potential to link high-level visual experiences to their underlying neurons’ spiking dynamic. In this work, we propose a neuromorphic (brain-inspired) Spiking Neural Network (SNN)-driven model for the reconstruction of colorful images from retinal inputs. We compared our results to experimentally obtained V1 neuronal activity maps in a macaque monkey using voltage-sensitive dye imaging and used the model to demonstrate and critically explore color constancy, color assimilation, and ambiguous color perception. Our parametric implementation allows critical evaluation of visual phenomena in a single biologically plausible computational framework. It uses a parametrized combination of high and low pass image filtering and SNN-based filling-in Poisson processes to provide adequate color image perception while accounting for differences in individual perception.

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Section: Discussionmentioning

confidence: 72%

Computational modeling of color perception with biologically plausible spiking neural networks

Cohen-Duwek

Slovin²,

Tsur³

2022

PLoS Comput Biol

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“…It was not specifically designed to explore the nature of color filling-in, perceptual filling-in in general, or to test theories of how it happens, particularly the delayed filling-in found with an artificial scotoma. There is much debate about the nature of filling-in and the neural mechanisms underlying it (e.g., Devinck & Knoblauch, 2019;Komatsu, 2006). Before considering the present results from some current perspectives on fading and filling-in, first consider the initial segmentation of our figure from the background.…”

Section: Discussionmentioning

confidence: 99%

“…Before considering the present results from some current perspectives on fading and filling-in, first consider the initial segmentation of our figure from the background. There is growing evidence that feedforward and recurrent activity along ventral striate and extrastriate areas Johnson, Hawken, & Shapley, 2008;Shapley & Hawken, 2011;Shapley, Nunez, & Gordon, 2019;Zweig, Zurawel, Shapley, & Slovin, 2015) as well as across dorsal and ventral areas (Devinck & Knoblauch, 2019;Gerardin et al, 2018) are involved in extracting and integrating edge/boundary and surface-color signals. For our stimuli, then, other than the flickering background in Experiment 1 that did not influence the results, the two stimulus attributes contributing to figureground segregation were the texture edges created by the homogeneous figure against the textured background and the color edges when figure and background were different colors.…”

Section: Discussionmentioning

confidence: 99%

When figure–ground segregation fails: Exploring antagonistic interactions in figure–ground perception

Brown

Plummer

2020

Atten Percept Psychophys

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Perceptual fading of an artificial scotoma can be viewed as a failure of figure-ground segregation, providing a useful tool for investigating possible mechanisms and processes involved in figure-ground perception. Weisstein's antagonistic magnocellular/ parvocellular stream figure-ground model proposes P stream activity encodes figure, and M stream activity encodes background. Where a boundary separates two regions, the region that is perceived as figure or ground is determined by the outcome of antagonism between M and P activity within each region and across the boundary between them. The region with the relatively stronger P "figure signal" is perceived as figure, and the region with the relatively stronger M "ground signal" is perceived as ground. From this perspective, fading occurs when the figure signal is overwhelmed by the ground signal. Strengthening the figure signal or weakening the ground signal should make the figure more resistant to fading. Based on research showing that red light suppresses M activity and short wavelength sensitive S-cones provide minimal input to M cells, we used red and blue light to reduce M activity in both figure and ground. The time to fade from stimulus onset until the figure completely disappeared was measured. Every combination of gray, green, red, and blue as figure and/or ground was tested. Compared with gray and green light, fade times were greatest when red or blue light either strengthened the figure signal by reducing M activity in the figure, or weakened the ground signal by reducing M activity in ground. The results support a dynamic antagonistic relationship between M and P activity contributing to figure-ground perception as envisioned in Weisstein's model.

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“…Perceptual filling-in, in which the visual system compensates for missing information in a region by interpolating information of the surrounding features, is yet another demonstration of the lateral modulation effect 22 – 25 . Filling-in can be observed under numerous viewing conditions.…”

Section: Introductionmentioning

confidence: 99%

Neural correlates of lateral modulation and perceptual filling-in in center-surround radial sinusoidal gratings: an fMRI study

Lin

Chen

Greenlee

2022

Sci Rep

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We investigated lateral modulation effects with functional magnetic resonance imaging. We presented radial sinusoidal gratings in random sequence: a scotoma grating with two arc-shaped blank regions (scotomata) in the periphery, one in the left and one in the right visual field, a center grating containing pattern only in the scotoma regions, and a full-field grating where the pattern occupied the whole screen. On each trial, one of the three gratings flickered in counterphase for 10 s, followed by a blank period. Observers were instructed to perform a fixation task and report whether filling-in was experienced during the scotoma condition. The results showed that the blood-oxygen-level-dependent signal was reduced in areas corresponding to the scotoma regions in the full-field compared to the center condition in V1 to V3 areas, indicating a lateral inhibition effect when the surround was added to the center pattern. The univariate analysis results showed no difference between the filling-in and no-filling-in trials. However, multivariate pattern analysis results showed that classifiers trained on activation pattern in V1 to V3 could differentiate between filling-in and no-filling-in trials, suggesting that the neural activation pattern in visual cortex correlated with the subjective percept.

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Central mechanisms of perceptual filling-in

Cited by 11 publications

References 74 publications

Computational modeling of color perception with biologically plausible spiking neural networks

Computational modeling of color perception with biologically plausible spiking neural networks

When figure–ground segregation fails: Exploring antagonistic interactions in figure–ground perception

Neural correlates of lateral modulation and perceptual filling-in in center-surround radial sinusoidal gratings: an fMRI study

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