Search Results for author: Fabio Anselmi

Found 9 papers, 2 papers with code

Local Search, Semantics, and Genetic Programming: a Global Analysis

no code implementations26 May 2023 Fabio Anselmi, Mauro Castelli, Alberto D'Onofrio, Luca Manzoni, Luca Mariot, Martina Saletta

In recent years, a new mutation operator, Geometric Semantic Mutation with Local Search (GSM-LS), has been proposed to include a local search step in the mutation process based on the idea that performing a linear regression during the mutation can allow for a faster convergence to good-quality solutions.

regression

Relating Implicit Bias and Adversarial Attacks through Intrinsic Dimension

1 code implementation24 May 2023 Lorenzo Basile, Nikos Karantzas, Alberto D'Onofrio, Luca Bortolussi, Alex Rodriguez, Fabio Anselmi

Despite their impressive performance in classification, neural networks are known to be vulnerable to adversarial attacks.

Image Classification

Understanding robustness and generalization of artificial neural networks through Fourier masks

1 code implementation16 Mar 2022 Nikos Karantzas, Emma Besier, Josue Ortega Caro, Xaq Pitkow, Andreas S. Tolias, Ankit B. Patel, Fabio Anselmi

Our results also indicate that the essential frequencies in question are effectively the ones used to achieve generalization in the first place.

Data Augmentation

Local Convolutions Cause an Implicit Bias towards High Frequency Adversarial Examples

no code implementations19 Jun 2020 Josue Ortega Caro, Yilong Ju, Ryan Pyle, Sourav Dey, Wieland Brendel, Fabio Anselmi, Ankit Patel

Inspired by theoretical work on linear full-width convolutional models, we hypothesize that the local (i. e. bounded-width) convolutional operations commonly used in current neural networks are implicitly biased to learn high frequency features, and that this is one of the root causes of high frequency adversarial examples.

Adversarial Robustness Vocal Bursts Intensity Prediction

A computational model for grid maps in neural populations

no code implementations18 Feb 2019 Fabio Anselmi, Micah M. Murray, Benedetta Franceschiello

Grid cells in the entorhinal cortex, together with head direction, place, speed and border cells, are major contributors to the organization of spatial representations in the brain.

View-tolerant face recognition and Hebbian learning imply mirror-symmetric neural tuning to head orientation

no code implementations5 Jun 2016 Joel Z. Leibo, Qianli Liao, Winrich Freiwald, Fabio Anselmi, Tomaso Poggio

The primate brain contains a hierarchy of visual areas, dubbed the ventral stream, which rapidly computes object representations that are both specific for object identity and relatively robust against identity-preserving transformations like depth-rotations.

Face Recognition Object +1

Deep Convolutional Networks are Hierarchical Kernel Machines

no code implementations5 Aug 2015 Fabio Anselmi, Lorenzo Rosasco, Cheston Tan, Tomaso Poggio

In i-theory a typical layer of a hierarchical architecture consists of HW modules pooling the dot products of the inputs to the layer with the transformations of a few templates under a group.

On Invariance and Selectivity in Representation Learning

no code implementations19 Mar 2015 Fabio Anselmi, Lorenzo Rosasco, Tomaso Poggio

We discuss data representation which can be learned automatically from data, are invariant to transformations, and at the same time selective, in the sense that two points have the same representation only if they are one the transformation of the other.

Representation Learning

Unsupervised Learning of Invariant Representations in Hierarchical Architectures

no code implementations17 Nov 2013 Fabio Anselmi, Joel Z. Leibo, Lorenzo Rosasco, Jim Mutch, Andrea Tacchetti, Tomaso Poggio

It also suggests that the main computational goal of the ventral stream of visual cortex is to provide a hierarchical representation of new objects/images which is invariant to transformations, stable, and discriminative for recognition---and that this representation may be continuously learned in an unsupervised way during development and visual experience.

Object Recognition speech-recognition +1

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