Search Results for author: Gianluca Maguolo

Found 13 papers, 2 papers with code

High performing ensemble of convolutional neural networks for insect pest image detection

no code implementations28 Aug 2021 Loris Nanni, Alessandro Manfe, Gianluca Maguolo, Alessandra Lumini, Sheryl Brahnam

The best performing ensemble, which combined the CNNs using the different augmentation methods and the two new Adam variants proposed here, achieved state of the art on both insect data sets: 95. 52% on Deng and 73. 46% on IP102, a score on Deng that competed with human expert classifications.

Data Augmentation

Deep ensembles based on Stochastic Activation Selection for Polyp Segmentation

no code implementations2 Apr 2021 Alessandra Lumini, Loris Nanni, Gianluca Maguolo

The basic architecture in image segmentation consists of an encoder and a decoder: the first uses convolutional filters to extract features from the image, the second is responsible for generating the final output.

Autonomous Driving Image Segmentation +4

Comparison of different convolutional neural network activation functions and methods for building ensembles

no code implementations29 Mar 2021 Loris Nanni, Gianluca Maguolo, Sheryl Brahnam, Michelangelo Paci

Because activation functions inject different nonlinearities between layers that affect performance, varying them is one method for building robust ensembles of CNNs.

Exploiting Adam-like Optimization Algorithms to Improve the Performance of Convolutional Neural Networks

no code implementations26 Mar 2021 Loris Nanni, Gianluca Maguolo, Alessandra Lumini

In this work, we compare Adam based variants based on the difference between the present and the past gradients, the step size is adjusted for each parameter.

Benchmarking

Deep learning and hand-crafted features for virus image classification

no code implementations11 Nov 2020 Loris Nanni, Eugenio De Luca, Marco Ludovico Facin, Gianluca Maguolo

The set of handcrafted is mainly based on Local Binary Pattern variants, for each descriptor a different Support Vector Machine is trained, then the set of classifiers is combined by sum rule.

Classification General Classification +1

An Ensemble of Convolutional Neural Networks for Audio Classification

no code implementations15 Jul 2020 Loris Nanni, Gianluca Maguolo, Sheryl Brahnam, Michelangelo Paci

The best performing ensembles combining data augmentation techniques with different signal representations are compared and shown to outperform the best methods reported in the literature on these datasets.

Data Augmentation Environmental Sound Classification +2

A Critic Evaluation of Methods for COVID-19 Automatic Detection from X-Ray Images

9 code implementations27 Apr 2020 Gianluca Maguolo, Loris Nanni

In this paper, we compare and evaluate different testing protocols used for automatic COVID-19 diagnosis from X-Ray images in the recent literature.

COVID-19 Diagnosis Fairness

Data augmentation approaches for improving animal audio classification

no code implementations16 Dec 2019 Loris Nanni, Gianluca Maguolo, Michelangelo Paci

To the best of our knowledge this is the largest study on data augmentation for CNNs in animal audio classification audio datasets using the same set of classifiers and parameters.

Audio Classification Data Augmentation +1

Audiogmenter: a MATLAB Toolbox for Audio Data Augmentation

1 code implementation11 Dec 2019 Gianluca Maguolo, Michelangelo Paci, Loris Nanni, Ludovico Bonan

Audio data augmentation is a key step in training deep neural networks for solving audio classification tasks.

Audio Classification Data Augmentation

Insect pest image detection and recognition based on bio-inspired methods

no code implementations1 Oct 2019 Loris Nanni, Gianluca Maguolo, Fabio Pancino

Our best ensembles reaches the state of the art accuracy on both the smaller dataset (92. 43%) and the IP102 dataset (61. 93%), approaching the performance of human experts on the smaller one.

Deep learning for Plankton and Coral Classification

no code implementations15 Aug 2019 Alessandra Lumini, Loris Nanni, Gianluca Maguolo

We study how to create an ensemble based of different CNN models, fine tuned on several datasets with the aim of exploiting their diversity.

Classification General Classification

Ensemble of Convolutional Neural Networks Trained with Different Activation Functions

no code implementations7 May 2019 Gianluca Maguolo, Loris Nanni, Stefano Ghidoni

The goal of this work is to propose an ensemble of Convolutional Neural Networks trained using several different activation functions.

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