Search Results for author: Federico Pernici

Found 12 papers, 7 papers with code

Maximally Compact and Separated Features with Regular Polytope Networks

1 code implementation15 Jan 2023 Federico Pernici, Matteo Bruni, Claudio Baecchi, Alberto del Bimbo

Convolutional Neural Networks (CNNs) trained with the Softmax loss are widely used classification models for several vision tasks.

CL2R: Compatible Lifelong Learning Representations

1 code implementation16 Nov 2022 Niccolo Biondi, Federico Pernici, Matteo Bruni, Daniele Mugnai, Alberto del Bimbo

We identify stationarity as the property that the feature representation is required to hold to achieve compatibility and propose a novel training procedure that encourages local and global stationarity on the learned representation.

Representation Learning

Contrastive Supervised Distillation for Continual Representation Learning

1 code implementation11 May 2022 Tommaso Barletti, Niccolo' Biondi, Federico Pernici, Matteo Bruni, Alberto del Bimbo

In this paper, we propose a novel training procedure for the continual representation learning problem in which a neural network model is sequentially learned to alleviate catastrophic forgetting in visual search tasks.

Representation Learning Retrieval

CoReS: Compatible Representations via Stationarity

1 code implementation15 Nov 2021 Niccolo Biondi, Federico Pernici, Matteo Bruni, Alberto del Bimbo

Compatible features enable the direct comparison of old and new learned features allowing to use them interchangeably over time.

Face Recognition

Fine-Grained Adversarial Semi-supervised Learning

no code implementations12 Oct 2021 Daniele Mugnai, Federico Pernici, Francesco Turchini, Alberto del Bimbo

Our approach leverages unlabeled data with an adversarial optimization strategy in which the internal features representation is obtained with a second-order pooling model.

Fine-Grained Visual Categorization

Regular Polytope Networks

1 code implementation IEEE Transactions on Neural Networks and Learning Systems 2021 Federico Pernici, Matteo Bruni, Claudio Baecchi, Alberto del Bimbo

Typically, a learnable transformation (i. e. the classifier) is placed at the end of such models returning a value for each class used for classification.

Temporal Binary Representation for Event-Based Action Recognition

1 code implementation18 Oct 2020 Simone Undri Innocenti, Federico Becattini, Federico Pernici, Alberto del Bimbo

In this paper we present an event aggregation strategy to convert the output of an event camera into frames processable by traditional Computer Vision algorithms.

Ranked #3 on Gesture Recognition on DVS128 Gesture (using extra training data)

Action Recognition Gesture Recognition

Class-incremental Learning with Pre-allocated Fixed Classifiers

1 code implementation16 Oct 2020 Federico Pernici, Matteo Bruni, Claudio Baecchi, Francesco Turchini, Alberto del Bimbo

Contrarily to the standard expanding classifier, this allows: (a) the output nodes of future unseen classes to firstly see negative samples since the beginning of learning together with the positive samples that incrementally arrive; (b) to learn features that do not change their geometric configuration as novel classes are incorporated in the learning model.

Class Incremental Learning Incremental Learning

Fix Your Features: Stationary and Maximally Discriminative Embeddings using Regular Polytope (Fixed Classifier) Networks

no code implementations27 Feb 2019 Federico Pernici, Matteo Bruni, Claudio Baecchi, Alberto del Bimbo

Typically, a learnable transformation (i. e. the classifier) is placed at the end of such models returning a value for each class used for classification.

General Classification

Memory Based Online Learning of Deep Representations from Video Streams

no code implementations CVPR 2018 Federico Pernici, Federico Bartoli, Matteo Bruni, Alberto del Bimbo

It is shown that the proposed learning procedure is asymptotically stable and can be effectively used in relevant applications like multiple face identification and tracking from unconstrained video streams.

Face Identification

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