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Conference | Brain
From 6/28/2021 to 6/28/2021
Li ZHAOPING (Tübingen MPI, Germany) will give a talk on Zoom on June 28th.
(1) Zhaoping, L. (2019) A new framework for understanding vision from the
perspective of the primary visual cortex Current Opinion in
Neurobiology, volume 58, page 1-10.
(2) Zhaoping, L. (2020) The flip tilt illusion: visible in peripheral vision as
predicted by the Central-Peripheral Dichotomy (CPD). i-Perception,
(3) Zhaoping, L. (2021) Contrast-reversed binocular dot-pairs in random-dot
stereograms for depth perception in central visual field: Probing the dynamics
of feedforward-feedback processes in visual inference, Vision
Research, vol. 186, pages 124-139.
V1SH is the V1 Saliency Hypothesis, and CPD is the Central-Peripheral Dichotomy.I will explain how they motivate a new framework: Visual attention selects only a tiny fraction of visual input information for further processing. Selection starts in the primary visual cortex (V1), which creates a bottom-up saliency map (V1SH) to guide the fovea to selected visual locations via gaze shifts.This motivates a new framework that views vision as consisting of encoding, selection, and decoding stages, placing selection on center stage. It suggests a massive loss of non-selected information from V1 downstream along the visual pathway. Hence, feedback from downstream visual cortical areas to V1 for better decoding (recognition), through analysis-by- synthesis, should query for additional information and be mainly directed at the foveal region (CPD). Accordingly, non-foveal vision is not only poorer in spatial resolution, but also more susceptible to many illusions. I will show some illusions arising from V1's feedforward inputs limited by the attentional bottleneck, and use random-dot stereograms to illustrate how top-down feedback constructively utilizes the feedforward inputs in some visual inferences and vetoes feedforward inputs in other cases, depending on the nature of the feedforward inputs
Alessandro Farnè (Centre de Recherche en Neurosciences de Lyon - CRNL)
Stefano PALMINTERI (ENS, Laboratoire de Neurosciences cognitives)
Jean-Pierre MOTHET (Université Paris-Saclay, LuMIn Lumière Matière et Interfaces)
Silvia BUNGE (UC Berkeley Psychology)
CEA is a French government-funded technological research organisation in four main areas: low-carbon energies, defense and security, information technologies and health technologies. A prominent player in the European Research Area, it is involved in setting up collaborative projects with many partners around the world.