Search Results for author: Jonathan Vacher

Found 7 papers, 1 papers with code

Perceptual Scales Predicted by Fisher Information Metrics

no code implementations18 Oct 2023 Jonathan Vacher, Pascal Mamassian

Here, we demonstrate the value of measuring the perceptual scale of classical (spatial frequency, orientation) and less classical physical variables (interpolation between textures) by embedding it in recent probabilistic modeling of perception.

Measuring uncertainty in human visual segmentation

no code implementations18 Jan 2023 Jonathan Vacher, Claire Launay, Pascal Mamassian, Ruben Coen-Cagli

We show that image uncertainty affects measured human variability, and it influences how participants weigh different visual features.

Segmentation

Texture Interpolation for Probing Visual Perception

1 code implementation NeurIPS 2020 Jonathan Vacher, Aida Davila, Adam Kohn, Ruben Coen-Cagli

We apply our method by measuring the perceptual scale associated to the interpolation parameter in human observers, and the neural sensitivity of different areas of visual cortex in macaque monkeys.

Texture Synthesis

Flexibly Regularized Mixture Models and Application to Image Segmentation

no code implementations25 May 2019 Jonathan Vacher, Claire Launay, Ruben Coen-Cagli

Our flexible approach can be easily generalized to adapt probabilistic mixture models to arbitrary data topologies.

Clustering Image Segmentation +2

Probabilistic Model of Visual Segmentation

no code implementations31 May 2018 Jonathan Vacher, Pascal Mamassian, Ruben Coen-Cagli

Following this hypothesis, we propose a probabilistic generative model of visual segmentation that combines knowledge about 1) the sensitivity of neurons in the visual cortex to statistical regularities in natural images; and 2) the preference of humans to form contiguous partitions of visual space.

Segmentation Semantic Segmentation

Bayesian Modeling of Motion Perception using Dynamical Stochastic Textures

no code implementations2 Nov 2016 Jonathan Vacher, Andrew Isaac Meso, Laurent U. Perrinet, Gabriel Peyré

We use the dynamic texture model to psychophysically probe speed perception in humans using zoom-like changes in the spatial frequency content of the stimulus.

Bayesian Inference Texture Synthesis

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