Search Results for author: João Paulo Papa

Found 29 papers, 12 papers with code

BioNeRF: Biologically Plausible Neural Radiance Fields for View Synthesis

1 code implementation11 Feb 2024 Leandro A. Passos, Douglas Rodrigues, Danilo Jodas, Kelton A. P. Costa, Ahsan Adeel, João Paulo Papa

This paper presents BioNeRF, a biologically plausible architecture that models scenes in a 3D representation and synthesizes new views through radiance fields.

Feature Selection and Hyperparameter Fine-tuning in Artificial Neural Networks for Wood Quality Classification

no code implementations20 Oct 2023 Mateus Roder, Leandro Aparecido Passos, João Paulo Papa, André Luis Debiaso Rossi

The predictive performance of the model was compared against five baseline methods as well as a random search, performing either ANN hyperparameter tuning and feature selection.

feature selection

Facial Point Graphs for Amyotrophic Lateral Sclerosis Identification

no code implementations22 Jul 2023 Nícolas Barbosa Gomes, Arissa Yoshida, Mateus Roder, Guilherme Camargo de Oliveira, João Paulo Papa

Identifying Amyotrophic Lateral Sclerosis (ALS) in its early stages is essential for establishing the beginning of treatment, enriching the outlook, and enhancing the overall well-being of those affected individuals.

Extractive Text Summarization Using Generalized Additive Models with Interactions for Sentence Selection

no code implementations21 Dec 2022 Vinícius Camargo da Silva, João Paulo Papa, Kelton Augusto Pontara da Costa

Automatic Text Summarization (ATS) is becoming relevant with the growth of textual data; however, with the popularization of public large-scale datasets, some recent machine learning approaches have focused on dense models and architectures that, despite producing notable results, usually turn out in models difficult to interpret.

Additive models Binary Classification +3

A survey on text generation using generative adversarial networks

no code implementations20 Dec 2022 Gustavo Henrique de Rosa, João Paulo Papa

This work presents a thorough review concerning recent studies and text generation advancements using Generative Adversarial Networks.

Adversarial Text Text Generation

Improving Pre-Trained Weights Through Meta-Heuristics Fine-Tuning

1 code implementation19 Dec 2022 Gustavo H. de Rosa, Mateus Roder, João Paulo Papa, Claudio F. G. dos Santos

Machine Learning algorithms have been extensively researched throughout the last decade, leading to unprecedented advances in a broad range of applications, such as image classification and reconstruction, object recognition, and text categorization.

Image Classification Object Recognition +1

PL-kNN: A Parameterless Nearest Neighbors Classifier

1 code implementation26 Sep 2022 Danilo Samuel Jodas, Leandro Aparecido Passos, Ahsan Adeel, João Paulo Papa

Demands for minimum parameter setup in machine learning models are desirable to avoid time-consuming optimization processes.

Canonical Cortical Graph Neural Networks and its Application for Speech Enhancement in Audio-Visual Hearing Aids

no code implementations6 Jun 2022 Leandro A. Passos, João Paulo Papa, Amir Hussain, Ahsan Adeel

Despite the recent success of machine learning algorithms, most models face drawbacks when considering more complex tasks requiring interaction between different sources, such as multimodal input data and logical time sequences.

BIG-bench Machine Learning Speech Enhancement

Handling Imbalanced Datasets Through Optimum-Path Forest

1 code implementation17 Feb 2022 Leandro Aparecido Passos, Danilo S. Jodas, Luiz C. F. Ribeiro, Marco Akio, Andre Nunes de Souza, João Paulo Papa

Such a behavior yields considerable influence on the machine learning model's performance since it becomes biased on the more frequent data it receives.

BIG-bench Machine Learning

Comparative Study Between Distance Measures On Supervised Optimum-Path Forest Classification

1 code implementation8 Feb 2022 Gustavo Henrique de Rosa, Mateus Roder, João Paulo Papa

Machine Learning has attracted considerable attention throughout the past decade due to its potential to solve far-reaching tasks, such as image classification, object recognition, anomaly detection, and data forecasting.

Anomaly Detection Benchmarking +2

Avoiding Overfitting: A Survey on Regularization Methods for Convolutional Neural Networks

no code implementations10 Jan 2022 Claudio Filipi Gonçalves dos Santos, João Paulo Papa

The works are classified into three main areas: the first one is called "data augmentation", where all the techniques focus on performing changes in the input data.

Data Augmentation Image Classification +2

Modeling Implicit Bias with Fuzzy Cognitive Maps

1 code implementation23 Dec 2021 Gonzalo Nápoles, Isel Grau, Leonardo Concepción, Lisa Koutsoviti Koumeri, João Paulo Papa

This paper presents a Fuzzy Cognitive Map model to quantify implicit bias in structured datasets where features can be numeric or discrete.

Fairness

Speeding Up OPFython with Numba

1 code implementation22 Jun 2021 Gustavo H. de Rosa, João Paulo Papa

A graph-inspired classifier, known as Optimum-Path Forest (OPF), has proven to be a state-of-the-art algorithm comparable to Logistic Regressors, Support Vector Machines in a wide variety of tasks.

A Layer-Wise Information Reinforcement Approach to Improve Learning in Deep Belief Networks

no code implementations17 Jan 2021 Mateus Roder, Leandro A. Passos, Luiz Carlos Felix Ribeiro, Clayton Pereira, João Paulo Papa

With the advent of deep learning, the number of works proposing new methods or improving existent ones has grown exponentially in the last years.

Image Classification

A Metaheuristic-Driven Approach to Fine-Tune Deep Boltzmann Machines

no code implementations14 Jan 2021 Leandro Aparecido Passos, João Paulo Papa

Deep learning techniques, such as Deep Boltzmann Machines (DBMs), have received considerable attention over the past years due to the outstanding results concerning a variable range of domains.

Image Reconstruction Metaheuristic Optimization

A Nature-Inspired Feature Selection Approach based on Hypercomplex Information

no code implementations14 Jan 2021 Gustavo H. de Rosa, João Paulo Papa, Xin-She Yang

The essential idea behind it is to find the most suitable subset of features according to some criterion.

feature selection

MaxDropout: Deep Neural Network Regularization Based on Maximum Output Values

2 code implementations27 Jul 2020 Claudio Filipi Goncalves do Santos, Danilo Colombo, Mateus Roder, João Paulo Papa

Different techniques have emerged in the deep learning scenario, such as Convolutional Neural Networks, Deep Belief Networks, and Long Short-Term Memory Networks, to cite a few.

Image Classification

Learnergy: Energy-based Machine Learners

1 code implementation16 Mar 2020 Mateus Roder, Gustavo Henrique de Rosa, João Paulo Papa

Throughout the last years, machine learning techniques have been broadly encouraged in the context of deep learning architectures.

OPFython: A Python-Inspired Optimum-Path Forest Classifier

1 code implementation28 Jan 2020 Gustavo Henrique de Rosa, João Paulo Papa, Alexandre Xavier Falcão

Machine learning techniques have been paramount throughout the last years, being applied in a wide range of tasks, such as classification, object recognition, person identification, and image segmentation.

General Classification Image Segmentation +3

On the Learning of Deep Local Features for Robust Face Spoofing Detection

no code implementations19 Jun 2018 Gustavo Botelho de Souza, João Paulo Papa, Aparecido Nilceu Marana

However, these methods do not consider the importance of learning deep local features from each facial region, even though it is known from face recognition that each facial region presents different visual aspects, which can also be exploited for face spoofing detection.

Face Recognition

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