Search Results for author: Laurent Perrinet

Found 6 papers, 4 papers with code

An adaptive homeostatic algorithm for the unsupervised learning of visual features

1 code implementation ICLR 2019 Victor Boutin, Angelo Franciosini, Laurent Perrinet

The formation of structure in the brain, that is, of the connections between cells within neural populations, is by large an unsupervised learning process: the emergence of this architecture is mostly self-organized.

Beyond $\ell_1$ sparse coding in V1

no code implementations24 Jan 2023 Ilias Rentzeperis, Luca Calatroni, Laurent Perrinet, Dario Prandi

Compared to other methods, soft thresholding achieves this level of sparsity at the expense of much degraded reconstruction performance, that more likely than not is not acceptable in biological vision.

Effect of top-down connections in Hierarchical Sparse Coding

1 code implementation3 Feb 2020 Victor Boutin, Angelo Franciosini, Franck Ruffier, Laurent Perrinet

In this study, a new model called 2-Layers Sparse Predictive Coding (2L-SPC) is introduced to assess the impact of this inter-layer feedback connection.

Sparse Deep Predictive Coding captures contour integration capabilities of the early visual system

1 code implementation20 Feb 2019 Victor Boutin, Angelo Franciosini, Frederic Chavane, Franck Ruffier, Laurent Perrinet

Third, we demonstrate at the representational level that the SDPC feedback connections are able to overcome noise in input images.

Decision Making

Sparse models for Computer Vision

1 code implementation24 Jan 2017 Laurent Perrinet

Applying such a paradigm to computer vision therefore seems a promising approach towards more biomimetic algorithms.

Differential response of the retinal neural code with respect to the sparseness of natural images

no code implementations21 Nov 2016 Cesar Ravello, Maria-Jose Escobar, Adrian Palacios, Laurent Perrinet

These recordings showed in particular that the reliability of spike timings varies with respect to the sparseness with globally a similar trend than the distribution of sparseness statistics observed in natural images.

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