Search Results for author: Cristiano Premebida

Found 13 papers, 4 papers with code

Causality from Bottom to Top: A Survey

no code implementations17 Mar 2024 Abraham Itzhak Weinberg, Cristiano Premebida, Diego Resende Faria

We study the impact of causality on various fields, its contribution, and its interaction with state-of-the-art approaches.

Anomaly Detection Fraud Detection +4

Reducing the False Positive Rate Using Bayesian Inference in Autonomous Driving Perception

no code implementations9 Sep 2023 Gledson Melotti, Johann J. S. Bastos, Bruno L. S. da Silva, Tiago Zanotelli, Cristiano Premebida

Object recognition is a crucial step in perception systems for autonomous and intelligent vehicles, as evidenced by the numerous research works in the topic.

Autonomous Driving Bayesian Inference +2

A Theoretical and Practical Framework for Evaluating Uncertainty Calibration in Object Detection

1 code implementation1 Sep 2023 Pedro Conde, Rui L. Lopes, Cristiano Premebida

For this reason, this work presents a novel theoretical and practical framework to evaluate object detection systems in the context of uncertainty calibration.

Autonomous Driving Medical Diagnosis +3

Multispectral Image Segmentation in Agriculture: A Comprehensive Study on Fusion Approaches

1 code implementation31 Jul 2023 Nuno Cunha, Tiago Barros, Mário Reis, Tiago Marta, Cristiano Premebida, Urbano J. Nunes

Multispectral imagery is frequently incorporated into agricultural tasks, providing valuable support for applications such as image segmentation, crop monitoring, field robotics, and yield estimation.

Edge Detection Image Segmentation +2

Approaching Test Time Augmentation in the Context of Uncertainty Calibration for Deep Neural Networks

1 code implementation11 Apr 2023 Pedro Conde, Tiago Barros, Rui L. Lopes, Cristiano Premebida, Urbano J. Nunes

With the rise of Deep Neural Networks, machine learning systems are nowadays ubiquitous in a number of real-world applications, which bears the need for highly reliable models.

Image Classification

High-Order Conditional Mutual Information Maximization for dealing with High-Order Dependencies in Feature Selection

no code implementations18 Jul 2022 Francisco Souza, Cristiano Premebida, Rui Araújo

The proposed High Order Conditional Mutual Information Maximization (HOCMIM) incorporates high order dependencies into the feature selection procedure and has a straightforward interpretation due to its bottom-up derivation.

feature selection Vocal Bursts Intensity Prediction

Reducing Overconfidence Predictions for Autonomous Driving Perception

no code implementations16 Feb 2022 Gledson Melotti, Cristiano Premebida, Jordan J. Bird, Diego R. Faria, Nuno Gonçalves

In state-of-the-art deep learning for object recognition, SoftMax and Sigmoid functions are most commonly employed as the predictor outputs.

Autonomous Driving Decision Making +1

Place recognition survey: An update on deep learning approaches

no code implementations19 Jun 2021 Tiago Barros, Ricardo Pereira, Luís Garrote, Cristiano Premebida, Urbano J. Nunes

As part of the localization system, place recognition has benefited from recent developments in other perception tasks such as place categorization or object recognition, namely with the emergence of deep learning (DL) frameworks.

Autonomous Vehicles Object Recognition

AttDLNet: Attention-based DL Network for 3D LiDAR Place Recognition

1 code implementation17 Jun 2021 Tiago Barros, Luís Garrote, Ricardo Pereira, Cristiano Premebida, Urbano J. Nunes

LiDAR-based place recognition is one of the key components of SLAM and global localization in autonomous vehicles and robotics applications.

Loop Closure Detection

Look and Listen: A Multi-modality Late Fusion Approach to Scene Classification for Autonomous Machines

no code implementations11 Jul 2020 Jordan J. Bird, Diego R. Faria, Cristiano Premebida, Anikó Ekárt, George Vogiatzis

The image and the audio datasets are first classified independently, using a fine-tuned VGG16 and an evolutionary optimised deep neural network, with accuracies of 89. 27% and 93. 72%, respectively.

Scene Classification

LSTM and GPT-2 Synthetic Speech Transfer Learning for Speaker Recognition to Overcome Data Scarcity

no code implementations1 Jul 2020 Jordan J. Bird, Diego R. Faria, Anikó Ekárt, Cristiano Premebida, Pedro P. S. Ayrosa

In speech recognition problems, data scarcity often poses an issue due to the willingness of humans to provide large amounts of data for learning and classification.

Classification General Classification +4

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