Recent & Upcoming Talks

2020

From the retina to action: Understanding visual processing

Visual areas are essential in transforming the raw luminous signal into a representation which efficiently conveys information about …

Des illusions aux hallucinations visuelles: une porte sur la perception

Les illusions visuelles sont des créations d’artistes, de scientifiques et plus récemment, grâce aux réseaux sociaux, du grand …

2019

Learning where to look: a foveated visuomotor control model

In computer vision, the visual search task consists in extracting a scarce and specific visual information (the target) from a large …

Should I stay or should I go? Humans adapt to the volatility of visual motion properties, and know about it

Animal behavior must constantly adapt to changes, for example when the state of an environmental context changes unexpectedly. For an …

Des illusions aux hallucinations visuelles: une porte sur la perception

Les objectifs sont : – mieux comprendre la fonction de la perception visuelle en explorant certaines limites ; – mieux comprendre l’importance de l’aspect dynamique de la perception ; – mieux comprendre le rôle de l’action dans la perception.

Should I stay or should I go? Adaption of human observers to the volatility of visual inputs

Animal behavior has to constantly adapt to changes, for instance when unexpectedly switching the state of an environmental context. For …

From the retina to action: Understanding visual processing

Visual areas are essential in transforming the raw luminous signal into a representation which efficiently conveys information about …

From the retina to action: Predictive processing in the visual system

Visual areas are essential in transforming the raw luminous signal into a representation which efficiently conveys information about …

Should I stay or should I go? Adaption of human observers to the volatility of visual inputs

See the final publication @ Pasturel, Montagnini and Perrinet (2020) previous talk @ LAW, Lyon previous talk @ INVIBE FEST, Paris previous talk @ Brain workshop, Marseille next talk @ CAUSAL Kick-off, Marseille

Rencontre avec les collégiens marseillais

Le jeudi 10 janvier 2019, je suis venu échanger au côté de Serge Dentin autour de films traitant du rapport fiction/réel, des illusion …

2018

La modélisation biomorphique de la perception visuelle

La modélisation biomorphique de la perception visuelle in “La modélisation de la genèse physico-mathématique du vivant” BIOMORPHISME ET CREATION ARTISTIQUE – Session 3 Date 11 Octobre 2018 Atelier Séminaire/workshop organisé dans le cadre du projet Biomorphisme. Approches sensibles et conceptuelles des formes du vivant http://lesa.univ-amu.fr/?q=node/391 http://centregranger.cnrs.fr Location Bâtiment Egger, dans la salle E 215 (2ème étage côté voie ferrée) - 3 avenue R. Schuman - Aix-en-Provence Visuels HTML Organisation

Intervention fête de la science 2018

FÊTE DE LA SCIENCE 2018 : Alcazar / MERLAN L’Association Polly Maggoo http://www.pollymaggoo.org/ met en place tout le long de l’année, des actions de culture scientifique et artistique en direction du grand public et des lycées, au cours desquelles l’association programme des films à caractère scientifique. Les projections se déroulent en présence de chercheurs et/ou de cinéastes dans la perspective d’un développement de la culture cinématographique et scientifique en direction des publics scolaires.

Principles and psychophysics of Active Inference in anticipating a dynamic, switching probabilistic bias

See the final publication @ Pasturel, Montagnini and Perrinet (2020) previous talk @ LAW, Lyon previous talk @ INVIBE FEST, Paris next talk @ LACONEU, Chile next talk @ CAUSAL Kick-off, Marseille next talk @ NeuroFrance, Marseille

Estimating and anticipating a dynamic probabilistic bias in visual motion direction

See the final publication @ Pasturel, Montagnini and Perrinet (2020) previous talk @ LAW, Lyon next talk @ Brain workshop, Marseille next talk @ LACONEU, Chile next talk @ CAUSAL Kick-off, Marseille next talk @ NeuroFrance, Marseille

Expériences autour de la perception de la forme en art et science

Meetup Art et Neurosciences Quoi Meetup Art et Neurosciences Qui Association NeuroNautes Quand 25 Janvier 2018 Où Salle des voutes campus Saint Charles Support visuel https://laurentperrinet.github.io/sciblog/files/2018-01-25_meetup-neuronautes.html (notes: la présentation peut mettre un certain temps à charger. Une fois que le titre apparait, appuyer sur la touche “F” pour mettre en plein écran)

2017

Unsupervised learning applied to robotic vision

Participation au jury

FESTIVAL INTERFÉRENCES​ Cinéma Documentaire et Débat Public Le collectif Scènes Publiques composé de citoyens, chercheurs et cinéastes, organise la deuxième édition du Festival Interférences du 8 au 18 novembre 2017 à Lyon. J’ai eu la chance de pouvoir participer au jury autour de documentaires avec un regard scientifiques. Une occasion aussi de parler du métier de chercheur. Date 17 et 18 Novembre 2017 Location Lyon Programmation http://www.lacitedoc.com/interferences-programmation

What dynamic neural codes for efficient visual processing

This seminar is an exercise to introduce the AMU masters into the format of international conferences. As such, we will try to …

Tutorial on predictive coding

2016

Participation au jury et entretien avec Clara Delmon

RENCONTRES INTERNATIONALES SCIENCES & CINÉMAS cinéma les Variétés L’Association Polly Maggoo http://www.pollymaggoo.org/ programme la 10e édition des RENCONTRES INTERNATIONALES SCIENCES & CINÉMAS (RISC) à Marseille, au cours desquelles l’association programme des films à caractère scientifique. Les projections se déroulent en présence de chercheurs et/ou de cinéastes dans la perspective d’un développement de la culture cinématographique et scientifique en direction des publics scolaires. Ce dimanche 20 novembre, je suis venu échanger au côté de Serge Dentin et Caroline Renard (Maître de conférences en études cinématographiques à Aix-Marseille Université), autour de films traitant du rapport fiction/réel, de la mémoire, et du temps.

The flash-lag effect as a motion-based predictive shift

Based on Perrinet et al, 2012 and Khoei et al, 2013 See a followup in Khoei et al, 2017

Reinforcement contingencies modulate anticipatory smooth eye movements

Natural environments potentially contain several interesting targets for goal-directed behavior. Thus sensorimotor systems need to …

Eye movements as a model for active inference

See the final publication @ Pasturel, Montagnini and Perrinet (2020) next talk @ INVIBE FEST, Paris next talk @ Brain workshop, Marseille next talk @ LACONEU, Chile next talk @ CAUSAL Kick-off, Marseille next talk @ NeuroFrance, Marseille

Modelling the dynamics of cognitive processes: from the Bayesian brain to particles

See a followup in Perrinet et al, 2012

Les illusions visuelles, un révélateur du fonctionnement de notre cerveau

Les illusions visuelles sont des créations d’artistes, de scientifiques et plus récemment, grâce aux réseaux sociaux, du grand …

Les illusions visuelles, un révélateur du fonctionnement de notre cerveau

Ce lundi 25 avril de 9h à 12h, je suis venu échanger au côté de Serge Dentin autour de films traitant du rapport fiction/réel, des …

2015

Motion-based prediction with neuromorphic hardware

We stand at a point in history where our phones have become smart but lack a feature which prevails in most forms of living …

Motion-based prediction with neuromorphic hardware

We stand at a point in history where our phones have become smart but lack a feature which prevails in most forms of living …

2014

WP5 - Demo 1.3 : Spiking model of motion-based prediction

The question how the visual system is able to create a coherent representation of a rapidly changing environment in the presence of …

Axonal delays and on-time control of eye movements

Moving objects generate sensory information that may be noisy and ambiguous, yet it is important to be able to reconstruct object speed …

2013

Demo 1, Task4: Implementation of models showing emergence of cortical fields and maps

Together with Bernhard Kaplan, we talked about how we aim at “compiling” a predictive motion-based approach as a spiking neural networks and then as a parallel wafer systems in the BrainscaleS project (Demo 1, Task4). (private to the consortium: https://brainscales.kip.uni-heidelberg.de/internal/jss/AttendMeeting?m=showMeetingInfoPage&meetingID=52 https://brainscales.kip.uni-heidelberg.de/internal/jss/AttendMeeting?m=showAgenda&meetingID=52 including copies of the slides)

Edge co-occurrences and categorizing natural images

See a followup in Perrinet and Bednar, 2015

Why methods and tools are the key to artificial brain-like systems

This session aims at presenting new ideas that emerged during the first years of BrainScaleS. Indeed, the collaborations that were …

2012

Edge statistics in natural images versus laboratory animal environments: implications for understanding lateral connectivity in V1

Oriented edges in images of natural scenes tend to be aligned in collinear or co-circular arrangements, with lines and smooth curves …

Apparent motion in V1 - Probabilistic approaches

Grabbing, tracking and sniffing as models for motion detection and eye movements

Moving objects generate sensory information that may be noisy and ambiguous, yet it is important to be able to reconstruct object speed …

Edge statistics in natural images versus laboratory animal environments: implications for understanding lateral connectivity in V1

Oriented edges in images of natural scenes tend to be aligned in collinear or co-circular arrangements, with lines and smooth curves …

Motion-based prediction is sufficient to solve the aperture problem

In low-level sensory systems, it is still unclear how the noisy information collected locally by neurons may give rise to a coherent …

2011

Edge statistics in natural images versus laboratory animal environments: implications for understanding lateral connectivity in V1

Oriented edges in images of natural scenes tend to be aligned in collinear or co-circular arrangements, with lines and smooth curves …

Edge statistics in natural images versus laboratory animal environments: implications for understanding lateral connectivity in V1

Oriented edges in images of natural scenes tend to be aligned in collinear or co-circular arrangements, with lines and smooth curves …

Propriétés émergentes d'un modèle de prédiction probabiliste utilisant un champ neural

Sensory informations such as visual images are inherently variable. We use probabilistic models to describe how the low-level visual …

2010

Probabilistic models of the low-level visual system: the role of prediction in detecting motion

Sensory informations such as visual images are inherently variable. We use probabilistic models to describe how the low-level visual …

Diffraction monochromatique, spectre audiographique

En perception, les neurones « parlent » tous en même temps par de brèves impulsions électrochimiques, générant un mélange de signaux, …

2009

Reading out the dynamics of lateral interactions in the primary visual cortex from VSD data

Short presentation of a large moving pattern elicits an ocular following response that exhibits many of the properties attributed to …

Peut-on parler d'intelligence mécanique?

Nous parlerons de cette partie "mécanique" du cerveau animal ou humain qui permet de percevoir les mouvements et de … …

Decoding low-level neural information to track visual motion

Moving the eyes rapidly to track a visual object moving in a cluttered environment is an essential function. However, doing so rapidly …

2008

Decoding the population dynamics underlying ocular following response using a probabilistic framework

The machinery behind the visual perception of motion and the subsequent sensorimotor transformation, such as in Ocular Following …

From neural activity to behavior: computational neuroscience as a synthetic approach for understanding the neural code.

Computational Neuroscience is a synthetic, inter-disciplinary approach aiming at understanding cognition by analyzing the mechanisms …

Modeling of spikes, sparseness and adaptation in the primary visual cortex: applications to imaging

related publications @ FENS 2006, @ NeuroComp 2008 and @ AREADNE 2008

2007

Neural Codes for Adaptive Sparse Representations of Natural Images

I will illustrate in this talk how computational neuroscience may inspire and be inspired by mathematical image processing. Focusing on …

2006

Input-output transformation in the visuo-oculomotor loop: modeling the ocular following response to center-surround stimulation in a probabilistic framework

The quality of the representation of an object’s motion is limited by the noise in the sensory input as well as by an intrinsic …