Hélio Lopes

According to our database, Hélio Lopes authored at least 144 papers between 1997 and 2024.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

2024

Identifying concerns when specifying machine learning-enabled systems: A perspective-based approach.

Hugo Villamizar, Marcos Kalinowski, Hélio Lopes, Daniel Méndez

J. Syst. Softw., 2024

Naming the Pain in Machine Learning-Enabled Systems Engineering.

Marcos Kalinowski, Daniel Méndez, Görkem Giray, Antonio Pedro Santos Alves, Kelly Azevedo, Tatiana Escovedo, Hugo Villamizar, Hélio Lopes, Maria Teresa Baldassarre, Stefan Wagner, Stefan Biffl, Jürgen Musil, Michael Felderer, Niklas Lavesson, Tony Gorschek

CoRR, 2024

Geometric implicit neural representations for signed distance functions.

Luiz Schirmer, Tiago Novello, Vinícius da Silva, Guilherme Schardong, Daniel Perazzo, Hélio Lopes, Nuno Gonçalves, Luiz Velho

Comput. Graph., 2024

ML-Enabled Systems Model Deployment and Monitoring: Status Quo and Problems.

Eduardo Zimelewicz, Marcos Kalinowski, Daniel Méndez, Görkem Giray, Antonio Pedro Santos Alves, Niklas Lavesson, Kelly Azevedo, Hugo Villamizar, Tatiana Escovedo, Hélio Lopes, Stefan Biffl, Juergen Musil, Michael Felderer, Stefan Wagner, Maria Teresa Baldassarre, Tony Gorschek

Proceedings of the Software Quality as a Foundation for Security, 2024

Agile Minds, Innovative Solutions, and Industry-Academia Collaboration: Lean R&D Meets Problem-Based Learning in Software Engineering Education.

Lucas Romao, Marcos Kalinowski, Clarissa Barbosa, Allysson Allex Araújo, Simone D. J. Barbosa, Hélio Lopes

Proceedings of the 38th Brazilian Symposium on Software Engineering, 2024

Industrial Practices of Requirements Engineering for ML-Enabled Systems in Brazil.

Antonio Pedro Santos Alves, Marcos Kalinowski, Daniel Méndez, Hugo Villamizar, Kelly Azevedo, Tatiana Escovedo, Hélio Lopes

Proceedings of the 38th Brazilian Symposium on Software Engineering, 2024

High-Resolution Detection of Earth Structural Heterogeneities from Seismic Amplitudes using Convolutional Neural Networks with Attention layers.

Luiz Schirmer, Guilherme G. Schardong, Vinícius da Silva, Rogério Santos, Hélio Lopes

Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition, 2024

Investigating the Impact of SOLID Design Principles on Machine Learning Code Understanding.

Raphael Cabral, Marcos Kalinowski, Maria Teresa Baldassarre, Hugo Villamizar, Tatiana Escovedo, Hélio Lopes

Proceedings of the IEEE/ACM 3rd International Conference on AI Engineering, 2024

2023

ML-Enabled Systems Model Deployment and Monitoring: Status Quo and Problems.

Eduardo Zimelewicz, Marcos Kalinowski, Daniel Méndez, Görkem Giray, Antonio Pedro Santos Alves, Niklas Lavesson, Kelly Azevedo, Hugo Villamizar, Tatiana Escovedo, Hélio Lopes, Stefan Biffl, Juergen Musil, Michael Felderer, Stefan Wagner, Maria Teresa Baldassarre, Tony Gorschek

Dataset, November, 2023

MR-Net: Multiresolution sinusoidal neural networks.

Hallison Paz, Daniel Perazzo, Tiago Novello, Guilherme G. Schardong, Luiz Schirmer, Vinícius da Silva, Daniel Yukimura, Fabio Chagas, Hélio Lopes, Luiz Velho

Comput. Graph., August, 2023

A systematic mapping study and practitioner insights on the use of software engineering practices to develop MVPs.

Silvio Alonso, Marcos Kalinowski, Bruna Ferreira, Simone D. J. Barbosa, Hélio Lopes

Inf. Softw. Technol., April, 2023

Lessons learned to improve the UX practices in agile projects involving data science and process automation.

Bruna Ferreira, Silvio Marques, Marcos Kalinowski, Hélio Lopes, Simone D. J. Barbosa

Inf. Softw. Technol., 2023

Designing Intelligent Agents in Normative Systems Toward Data Regulation Representation.

Paulo Henrique Cardoso Alves, Fernando A. Correia, Isabella Zalcberg Frajhof, Clarisse Sieckenius de Souza, Hélio Lopes

IEEE Access, 2023

How to Train Your (Neural) Dragon.

Luiz Schirmer, Tiago Novello, Vinícius da Silva, Guilherme G. Schardong, Hélio Lopes, Luiz Velho

Proceedings of the 36th SIBGRAPI Conference on Graphics, Patterns and Images, 2023

Status Quo and Problems of Requirements Engineering for Machine Learning: Results from an International Survey.

Antonio Pedro Santos Alves, Marcos Kalinowski, Görkem Giray, Daniel Méndez, Niklas Lavesson, Kelly Azevedo, Hugo Villamizar, Tatiana Escovedo, Hélio Lopes, Stefan Biffl, Jürgen Musil, Michael Felderer, Stefan Wagner, Maria Teresa Baldassarre, Tony Gorschek

Proceedings of the Product-Focused Software Process Improvement, 2023

Neural Implicit Surface Evolution.

Tiago Novello, Vinícius da Silva, Guilherme G. Schardong, Luiz Schirmer, Hélio Lopes, Luiz Velho

Proceedings of the IEEE/CVF International Conference on Computer Vision, 2023

Binary Matrix Factorization Discretization.

Georges Spyrides, Marcus Poggi, Hélio Lopes

Proceedings of the Artificial Intelligence and Soft Computing, 2023

A Normative Multiagent Approach to Represent Data Regulation Concerns.

Paulo Henrique Cardoso Alves, Fernando A. Correia, Isabella Zalcberg Frajhof, Clarisse Sieckenius de Souza, Hélio Lopes

Proceedings of the 15th International Conference on Agents and Artificial Intelligence, 2023

Dynamic Topic Modeling with Tensor Decomposition as a Tool to Explore the Legal Precedent Relevance Over Time.

Fernando A. Correia, José Luiz Nunes, Paulo Henrique Cardoso Alves, Hélio Lopes

Proceedings of the ACM Symposium on Document Engineering 2023, 2023

2022

Investigating the relationships between class probabilities and users' appropriate trust in computer vision classifications of ambiguous images.

Gabriel Diniz Junqueira Barbosa, Dalai dos Santos Ribeiro, Marisa Do Carmo Silva, Hélio Lopes, Simone Diniz Junqueira Barbosa

J. Comput. Lang., 2022

Extracting value from Brazilian Court decisions.

William Paulo Ducca Fernandes, Isabella Zalcberg Frajhof, Guilherme da Franca Couto Fernandes de Almeida, Ariane Moraes Bueno Rodrigues, Simone Diniz Junqueira Barbosa, Carlos Nelson Konder, Rafael Nasser, Gustavo Robichez de Carvalho, Hélio Côrtes Vieira Lopes

Inf. Syst., 2022

Fine-grained legal entity annotation: A case study on the Brazilian Supreme Court.

Fernando A. Correia, Alexandre A. A. de Almeida, José Luiz Nunes, Kaline G. Santos, Ivar A. Hartmann, Felipe A. Silva, Hélio Lopes

Inf. Process. Manag., 2022

Neural Implicit Surfaces in Higher Dimension.

Tiago Novello, Vinícius da Silva, Hélio Lopes, Guilherme G. Schardong, Luiz Schirmer, Luiz Velho

CoRR, 2022

Differential Geometry in Neural Implicits.

Tiago Novello, Vinícius da Silva, Hélio Lopes, Guilherme G. Schardong, Luiz Schirmer, Luiz Velho

CoRR, 2022

MIP-plicits: Level of Detail Factorization of Neural Implicits Sphere Tracing.

Vinícius da Silva, Tiago Novello, Guilherme G. Schardong, Luiz Schirmer, Hélio Lopes, Luiz Velho

CoRR, 2022

Exploring differential geometry in neural implicits.

Tiago Novello, Guilherme G. Schardong, Luiz Schirmer, Vinícius da Silva, Hélio Lopes, Luiz Velho

Comput. Graph., 2022

A Catalogue of Concerns for Specifying Machine Learning-Enabled Systems.

Hugo Villamizar, Marcos Kalinowski, Hélio Lopes

Proceedings of the Anais do WER22, 2022

Multiresolution Neural Networks for Imaging.

Hallison Paz, Tiago Novello, Vinícius da Silva, Guilherme G. Schardong, Luiz Schirmer, Fabio Chagas, Hélio Lopes, Luiz Velho

Proceedings of the 35th SIBGRAPI Conference on Graphics, Patterns and Images, 2022

Mineração de Processos Aplicada à Auditoria Interna na Marinha do Brasil.

Marcos Alexandre Castro, Nelson Souza Jr, Tatiana Escovedo, Hélio Lopes, Marcos Kalinowski

Proceedings of the 37th Brazilian Symposium on Databases, 2022

Machine Learning Aplicado à Predição da Obrigação do Investimento em P, D&I.

Flávia Bravo, Luciana Sousa, Tatiana Escovedo, Hélio Lopes, Marcos Kalinowski

Proceedings of the 37th Brazilian Symposium on Databases, 2022

Investigating whether people identify how suitable a data visualization is for answering specific analysis questions.

Ariane Moraes Bueno Rodrigues, Gabriel Diniz Junqueira Barbosa, Hélio Côrtes Vieira Lopes, Simone Diniz Junqueira Barbosa

Proceedings of the 21st Brazilian Symposium on Human Factors in Computing Systems, 2022

Using model cards for ethical reflection: a qualitative exploration.

José Luiz Nunes, Gabriel D. J. Barbosa, Clarisse Sieckenius de Souza, Hélio Lopes, Simone D. J. Barbosa

Proceedings of the 21st Brazilian Symposium on Human Factors in Computing Systems, 2022

Towards Perspective-Based Specification of Machine Learning-Enabled Systems.

Hugo Villamizar, Marcos Kalinowski, Hélio Lopes

Proceedings of the 48th Euromicro Conference on Software Engineering and Advanced Applications, 2022

2021

Real-time rendering of complex fractals.

Vinícius da Silva, Tiago Novello, Hélio Lopes, Luiz Velho

CoRR, 2021

What questions reveal about novices' attempts to make sense of data visualizations: Patterns and misconceptions.

Ariane Moraes Bueno Rodrigues, Gabriel Diniz Junqueira Barbosa, Hélio Côrtes Vieira Lopes, Simone Diniz Junqueira Barbosa

Comput. Graph., 2021

Exploring the impact of classification probabilities on users' trust in ambiguous instances.

Dalai dos Santos Ribeiro, Gabriel Diniz Junqueira Barbosa, Marisa Do Carmo Silva, Hélio Lopes, Simone Diniz Junqueira Barbosa

Proceedings of the IEEE Symposium on Visual Languages and Human-Centric Computing, 2021

Neural Networks for Implicit Representations of 3D Scenes.

Luiz José Schirmer Silva, Guilherme G. Schardong, Vinícius da Silva, Hélio Lopes, Tiago Novello, Daniel Yukimura, Thales Magalhaes, Hallison Paz, Luiz Velho

Proceedings of the 34th SIBGRAPI Conference on Graphics, Patterns and Images, 2021

SGAT: Semantic Graph Attention for 3D human pose estimation.

Luiz Schirmer, Djalma Lucio, Leandro Cruz, Alberto Barbosa Raposo, Luiz Velho, Hélio Lopes

Proceedings of the 34th SIBGRAPI Conference on Graphics, Patterns and Images, 2021

Investigating Problem Definition and End-User Involvement in Agile Projects that Use Lean Inceptions.

Bruna Ferreira, Marcos Kalinowski, Marcos Vinicius de Carvalho Gomes, Marcelo Cardoso Marques, Hélio Lopes, Simone D. J. Barbosa

Proceedings of the SBQS '21: XX Brazilian Symposium on Software Quality, Virtual Event, Brazil, November 8, 2021

Yet another BLE technology based tracking system.

Flavia Schneider, Adriano Branco, Ariane M. B. Rodrigues, Felipe Oliveira Carvalho, Simone D. J. Barbosa, Markus Endler, Hélio Lopes

Proceedings of the SAC '21: The 36th ACM/SIGAPP Symposium on Applied Computing, 2021

A Robust Real-time Component for Personal Protective Equipment Detection in an Industrial Setting.

Pedro Torres, André Davys, Thuener Silva, Luiz José Schirmer Silva, André Kuramoto, Bruno Itagyba, Cristiane Salgado, Sidney Comandulli, Patricia Ventura, Leonardo Fialho, Marinho Fischer, Marcos Kalinowski, Simone D. J. Barbosa, Hélio Lopes

Proceedings of the 23rd International Conference on Enterprise Information Systems, 2021

Lessons Learned from a Lean R&D Project.

Bianca Rodrigues Teixeira, Bruna Ferreira, André Luiz Brandão de Damasceno, Simone D. J. Barbosa, Cassia Novello, Hugo Villamizar, Marcos Kalinowski, Thuener Silva, Jacques Chueke, Hélio Lopes, André Kuramoto, Bruno Itagyba, Cristiane Salgado, Sidney Comandulli, Marinho Fischer, Leonardo Fialho

Proceedings of the 23rd International Conference on Enterprise Information Systems, 2021

Visual Analysis Tool for a BLE Technology based Tracking Data.

Flavia Schneider, Adriano Branco, Ariane M. B. Rodrigues, Felipe Oliveira Carvalho, Simone D. J. Barbosa, Markus Endler, Hélio Lopes

Proceedings of the 23rd International Conference on Enterprise Information Systems, 2021

Controlling Personal Data Flow: An Ontology in the COVID-19 Outbreak using a Permissioned Blockchain.

Paulo Henrique Cardoso Alves, Isabella Zalcberg Frajhof, Fernando A. Correia, Clarisse S. de Souza, Hélio Lopes

Proceedings of the 23rd International Conference on Enterprise Information Systems, 2021

Interpretable Concept Drift.

João Guilherme Mattos, Thuener Silva, Hélio Lopes, Alex Laier Bordignon

Proceedings of the Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications, 2021

2020

Smoothing Tidal Effects in Well Test Pressure Data.

Felipe A. de Oliveira, Andrea L. e L. Souza, Abelardo Barreto, Marcos Craizer, Hélio Lopes, Sinésio Pesco

IEEE Geosci. Remote. Sens. Lett., 2020

Eras: Improving the quality control in the annotation process for Natural Language Processing tasks.

Jonatas S. Grosman, Pedro Henrique Thompson Furtado, Ariane M. B. Rodrigues, Guilherme G. Schardong, Simone D. J. Barbosa, Hélio Côrtes Vieira Lopes

Inf. Syst., 2020

Seismic fault detection in real data using transfer learning from a convolutional neural network pre-trained with synthetic seismic data.

Augusto Cunha, Axelle Pochet, Hélio Lopes, Marcelo Gattass

Comput. Geosci., 2020

Proceduray - A light-weight engine for procedural primitive ray tracing.

Vinícius da Silva, Tiago Novello, Hélio Lopes, Luiz Velho

CoRR, 2020

Second layer data governance for permissioned blockchains: the privacy management challenge.

Paulo Henrique Cardoso Alves, Isabella Zalcberg Frajhof, Fernando A. Correia, Clarisse S. de Souza, Hélio Lopes

CoRR, 2020

Appellate Court Modifications Extraction for Portuguese.

William Paulo Ducca Fernandes, Luiz José Schirmer Silva, Isabella Zalcberg Frajhof, Guilherme da Franca Couto Fernandes de Almeida, Carlos Nelson Konder, Rafael Nasser, Gustavo Robichez de Carvalho, Simone Diniz Junqueira Barbosa, Hélio Côrtes Vieira Lopes

Artif. Intell. Law, 2020

A lightweight 2D Pose Machine with attention enhancement.

Luiz José Schirmer Silva, Djalma Lúcio, Alberto Raposo, Luiz Velho, Hélio Lopes

Proceedings of the 33rd SIBGRAPI Conference on Graphics, Patterns and Images, 2020

Investigating Multimodal Features for Video Recommendations at Globoplay.

Felipe Ferreira, Daniele R. Souza, Igor Moura, Matheus Barbieri, Hélio Côrtes Vieira Lopes

Proceedings of the RecSys 2020: Fourteenth ACM Conference on Recommender Systems, 2020

Lean R&D: An Agile Research and Development Approach for Digital Transformation.

Marcos Kalinowski, Hélio Lopes, Alex Furtado Teixeira, Gabriel da Silva Cardoso, André Kuramoto, Bruno Itagyba, Solon Tarso Batista, Juliana Alves Pereira, Thuener Silva, Jorge Alam Warrak, Marcelo Silva da Costa, Marinho Fischer, Cristiane Salgado, Bianca Rodrigues Teixeira, Jacques Chueke, Bruna Ferreira, Rodrigo Lima, Hugo Villamizar, André Brandão, Simone D. J. Barbosa, Marcus Poggi, Carlos Pelizaro, Deborah Lemes, Marcus Waltemberg, Odnei Lopes, Willer Goulart

Proceedings of the Product-Focused Software Process Improvement, 2020

Permissioned Blockchains: Towards Privacy Management and Data Regulation Compliance.

Paulo Henrique Cardoso Alves, Isabella Zalcberg Frajhof, Fernando A. Correia, Clarisse Sieckenius de Souza, Hélio Lopes

Proceedings of the Legal Knowledge and Information Systems, 2020

Using a Domain Ontology to Bridge the Gap between User Intention and Expression in Natural Language Queries.

Alysson Gomes de Sousa, Dalai dos Santos Ribeiro, Rômulo César Costa de Sousa, Ariane Moraes Bueno Rodrigues, Pedro Henrique Thompson Furtado, Simone Diniz Junqueira Barbosa, Hélio Lopes

Proceedings of the 22nd International Conference on Enterprise Information Systems, 2020

Globo Face Stream: A System for Video Meta-data Generation in an Entertainment Industry Setting.

Rafael Peña, Felipe A. Ferreira, Frederico Caroli, Luiz José Schirmer Silva, Hélio Lopes

Proceedings of the 22nd International Conference on Enterprise Information Systems, 2020

Brazilian Lyrics-Based Music Genre Classification Using a BLSTM Network.

Raul de Araújo Lima, Rômulo César Costa de Sousa, Hélio Lopes, Simone Diniz Junqueira Barbosa

Proceedings of the Artificial Intelligence and Soft Computing, 2020

Revisiting Visualization Task Taxonomies: Specifying Functions for the Data Transformations Stage.

Ariane Moraes Bueno Rodrigues, Gabriel Diniz Junqueira Barbosa, Raul de Araújo Lima, Dieinison Jack Freire Braga, Hélio Côrtes Vieira Lopes, Simone Diniz Junqueira Barbosa

Proceedings of the Human-Computer Interaction. Design and User Experience, 2020

Exploring Ontology-Based Information Through the Progressive Disclosure of Visual Answers to Related Queries.

Dalai dos Santos Ribeiro, Alysson Gomes de Sousa, Rodrigo B. de Almeida, Pedro Henrique Thompson Furtado, Hélio Côrtes Vieira Lopes, Simone Diniz Junqueira Barbosa

Proceedings of the Human Interface and the Management of Information. Designing Information, 2020

Towards Lean R&D: An Agile Research and Development Approach for Digital Transformation.

Marcos Kalinowski, Solon Tarso Batista, Hélio Lopes, Simone D. J. Barbosa, Marcus Poggi, Thuener Silva, Hugo Villamizar, Jacques Chueke, Bianca Rodrigues Teixeira, Juliana Alves Pereira, Bruna Ferreira, Rodrigo Lima, Gabriel da Silva Cardoso, Alex Furtado Teixeira, Jorge Alam Warrak, Marinho Fischer, André Kuramoto, Bruno Itagyba, Cristiane Salgado, Carlos Pelizaro, Deborah Lemes, Marcelo Silva da Costa, Marcus Waltemberg, Odnei Lopes

Proceedings of the 46th Euromicro Conference on Software Engineering and Advanced Applications, 2020

An End-to-end Framework for 3D Capture and Human Digitization with a Single RGB Camera.

Luiz José Schirmer Silva, Djalma Lúcio Soares da Silva, Luiz Velho, Hélio Lopes

Proceedings of the 41st Annual Conference of the European Association for Computer Graphics, 2020

2019

Seismic Fault Detection Using Convolutional Neural Networks Trained on Synthetic Poststacked Amplitude Maps.

Axelle Pochet, Pedro Henrique Bandeira Diniz, Hélio Lopes, Marcelo Gattass

IEEE Geosci. Remote. Sens. Lett., 2019

ARTMe: a new array-based algorithm for Adaptive Refinement of Triangle Meshes.

Jéferson Coêlho, Marcelo Gattass, Hélio Lopes

Eng. Comput., 2019

Tensorpose: Real-time pose estimation for interactive applications.

Luiz José Schirmer Silva, Djalma Lúcio Soares da Silva, Alberto Barbosa Raposo, Luiz Velho, Hélio Côrtes Vieira Lopes

Comput. Graph., 2019

Visual exploration of an ensemble of classifiers.

Paula Ceccon Ribeiro, Guilherme G. Schardong, Simone D. J. Barbosa, Clarisse Sieckenius de Souza, Hélio Lopes

Comput. Graph., 2019

Comparing the Effectiveness of Visualizations of Different Data Distributions.

Ariane M. B. Rodrigues, Gabriel D. J. Barbosa, Hélio Lopes, Simone D. J. Barbosa

Proceedings of the 32nd SIBGRAPI Conference on Graphics, Patterns and Images, 2019

Bootstrapping Vector Fields.

Paula Ceccon Ribeiro, Hélio Lopes

Proceedings of the 14th International Joint Conference on Computer Vision, 2019

Visual Exploration Tools for Ensemble Clustering Analysis.

Sonia Fiol-González, Cassio F. P. Almeida, Ariane M. B. Rodrigues, Simone D. J. Barbosa, Hélio Lopes

Proceedings of the 14th International Joint Conference on Computer Vision, 2019

An Exploratory Analysis of Precedent Relevance in the Brazilian Supreme Court Rulings.

Fernando A. Correia, José Luiz Nunes, Guilherme da Franca Couto Fernandes de Almeida, Alexandre A. A. de Almeida, Hélio Lopes

Proceedings of the ACM Symposium on Document Engineering 2019, 2019

Portuguese POS Tagging Using BLSTM Without Handcrafted Features.

Rômulo César Costa de Sousa, Hélio Lopes

Proceedings of the Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications, 2019

2018

Visual interactive support for selecting scenarios from time-series ensembles.

Guilherme G. Schardong, Ariane M. B. Rodrigues, Simone D. J. Barbosa, Hélio Lopes

Decis. Support Syst., 2018

Inverse Projection of Vector Fields.

Paula Ceccon Ribeiro, Hélio Lopes

Proceedings of the 31st SIBGRAPI Conference on Graphics, Patterns and Images, 2018

Visual Support to Filtering Cases for Process Discovery.

Luiz José Schirmer Silva, Leonardo Quatrin Campagnolo, Sonia Fiol-González, Ariane M. B. Rodrigues, Guilherme G. Schardong, Rafael França, Mauricio Lana, Simone D. J. Barbosa, Marcus Poggi, Hélio Lopes

Proceedings of the 20th International Conference on Enterprise Information Systems, 2018

Visual Filtering Tools and Analysis of Case Groups for Process Discovery.

Sonia Fiol-González, Luiz José Schirmer Silva, Leonardo Quatrin Campagnolo, Ariane M. B. Rodrigues, Guilherme G. Schardong, Rafael França, Mauricio Lana, Gabriel D. J. Barbosa, Simone D. J. Barbosa, Marcus Poggi, Hélio Lopes

Proceedings of the Enterprise Information Systems - 20th International Conference, 2018

Applying pattern-driven maintenance: a method to prevent latent unhandled exceptions in web applications.

Diogo S. Mendonça, Tarcila G. da Silva, Daniel Ferreira de Oliveira, Julliany Sales Brandão, Hélio Lopes, Simone D. J. Barbosa, Marcos Kalinowski, Arndt von Staa

Proceedings of the 12th ACM/IEEE International Symposium on Empirical Software Engineering and Measurement, 2018

A Novel Committee-Based Clustering Method.

Sonia Fiol-González, Cassio F. P. Almeida, Simone D. J. Barbosa, Hélio Lopes

Proceedings of the Big Data Analytics and Knowledge Discovery, 2018

Dealing with Heterogeneous Google Earth Images on Building Area Detection Task.

Cassio F. P. Almeida, William Fernandes, Simone D. J. Barbosa, Hélio Lopes

Proceedings of the Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications, 2018

2017

Lobbes: An Algorithm for Sparse-Spike Deconvolution.

Rodrigo Fernandes, Hélio Lopes, Marcelo Gattass

IEEE Geosci. Remote. Sens. Lett., 2017

LSHSIM: A Locality Sensitive Hashing based method for multiple-point geostatistics.

Pedro Moura, Eduardo Sany Laber, Hélio Lopes, Daniel Mesejo, Lucas Pavanelli, João Jardim, Francisco Thiesen, Gabriel Pujol

Comput. Geosci., 2017

A new quadtree-based approach for automatic quadrilateral mesh generation.

Axelle Pochet, Waldemar Celes Filho, Hélio Lopes, Marcelo Gattass

Eng. Comput., 2017

IBHM: index-based data structures for 2D and 3D hybrid meshes.

Marcos Lage, Luiz Fernando Martha, José Paulo Moitinho de Almeida, Hélio Lopes

Eng. Comput., 2017

Statistical tools for the temporal analysis and classification of lung lesions.

Stelmo Magalhães Barros Netto, Aristófanes Corrêa Silva, Hélio Lopes, Anselmo Cardoso de Paiva, Rodolfo Acatauassu Nunes, Marcelo Gattass

Comput. Methods Programs Biomed., 2017

CrimeVis: An Interactive Visualization System for Analyzing Crime Data in the State of Rio de Janeiro.

Luiz José Schirmer Silva, Sonia Fiol-González, Cassio F. P. Almeida, Simone D. J. Barbosa, Hélio Lopes

Proceedings of the ICEIS 2017, 2017

An Approach to Evaluate the Impact on Travel Time of Bus Network Changes.

Kathrin Rodríguez Llanes, Marco A. Casanova, Hélio Lopes, José Antônio Fernandes de Macêdo

Proceedings of the ICEIS 2017, 2017

On computing travel time functions from Trajectory Data Streams.

Samara Martins do Nascimento, José Antônio Fernandes de Macêdo, Hélio Côrtes Vieira Lopes, Ticiana L. Coelho da Silva, Marco Antonio Casanova, Javam de Castro Machado

Proceedings of the 8th ACM SIGSPATIAL Workshop on GeoStreaming, 2017

Mining the Criminal Data of Rio de Janeiro: Analyzing the Impact of the Pacifying Police Units Deployment.

Cassio F. P. Almeida, Sonia Fiol-González, Pedro C. L. Souza, Simone D. J. Barbosa, Hélio Lopes

Proceedings of the Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications, 2017

2016

A methodology for traffic-related Twitter messages interpretation.

Fábio da Costa Albuquerque, Marco A. Casanova, Hélio Lopes, Luciana R. Redlich, José Antônio Fernandes de Macêdo, Melissa Lemos, Marcelo Tílio Monteiro de Carvalho, Chiara Renso

Comput. Ind., 2016

Helmholtz-Hodge decomposition and the analysis of 2D vector field ensembles.

Paula Ceccon Ribeiro, Haroldo Fraga de Campos Velho, Hélio Lopes

Comput. Graph., 2016

BusesinRio: Buses as Mobile Traffic Sensors: Managing the Bus GPS Data in the City of Rio de Janeiro.

Bruno Guberfain Do Amaral, Rafael Nasser, Marco Antonio Casanova, Hélio Lopes

Proceedings of the IEEE 17th International Conference on Mobile Data Management, 2016

On the Design of a Traffic Observatory Application based on Bus Trajectories.

Kathrin Rodriguez, Marco A. Casanova, Luiz André P. Paes Leme, Hélio Lopes, Rafael Nasser, Bruno Guberfain Do Amaral

Proceedings of the ICEIS 2016, 2016

A Heuristic Approach for On-line Discovery of Unidentified Spatial Clusters from Grid-Based Streaming Algorithms.

Marcos Roriz, Markus Endler, Marco A. Casanova, Hélio Lopes, Francisco José da Silva e Silva

Proceedings of the Big Data Analytics and Knowledge Discovery, 2016

2014

FGNG: A fast multi-dimensional growing neural gas implementation.

Carlos Augusto Teixeira Mendes, Marcelo Gattass, Hélio Lopes

Neurocomputing, 2014

Uncertainty quantification through the Monte Carlo method in a cloud computing setting.

Americo Cunha Jr., Rafael Nasser, Rubens Sampaio, Hélio Lopes, Karin K. Breitman

Comput. Phys. Commun., 2014

Cloud based real-time collaborative filtering for item-item recommendations.

Rafael Pereira, Hélio Lopes, Karin K. Breitman, Vicente Mundim, Wandenberg Peixoto

Comput. Ind., 2014

Finite Element/Fictitious Domain programming for flows with particles made simple.

Marcos Lage, Lhaylla Crissaff, Hélio Lopes, Márcio da Silveira Carvalho

Adv. Eng. Softw., 2014

2013

Point-based rendering of implicit surfaces in <i>R</i>⁴R4.

Alex Laier Bordignon, Luana Sá, Hélio Lopes, Sinésio Pesco, Luiz Henrique de Figueiredo

Comput. Graph., 2013

A cloud computing based framework for general 2D and 3D cellular automata simulation.

Rodrigo Marques, Bruno Feijó, Karin K. Breitman, Thieberson Gomes, Laercio Ferracioli, Hélio Lopes

Adv. Eng. Softw., 2013

Real-Time Object Tracking in High-Definition Video Using Frame Segmentation and Background Integral Images.

Gustavo Moreira, Bruno Feijó, Hélio Lopes, Raul Queiroz Feitosa

Proceedings of the XXVI Conference on Graphics, Patterns and Images, 2013

2011

Flows with suspended and floating particles.

Marcos Lage, Hélio Lopes, Márcio da Silveira Carvalho

J. Comput. Phys., 2011

2010

Meshless Helmholtz-Hodge Decomposition.

Fabiano Petronetto, Afonso Paiva, Marcos Lage, Geovan Tavares, Hélio Lopes, Thomas Lewiner

IEEE Trans. Vis. Comput. Graph., 2010

Fast Generation of Pointerless Octree Duals.

Thomas Lewiner, Vinícius Mello, Adelailson Peixoto, Sinésio Pesco, Hélio Lopes

Comput. Graph. Forum, 2010

Topological mesh operators.

Thomas Lewiner, Hélio Lopes, Esdras Medeiros, Geovan Tavares, Luiz Velho

Comput. Aided Geom. Des., 2010

Topology Aware Vector Field Denoising.

Renata Nascimento, João Paixão, Hélio Lopes, Thomas Lewiner

Proceedings of the SIBGRAPI 2010, 2010

Tuning Manifold Harmonics Filters.

Thomas Lewiner, Thales Vieira, Alex Laier Bordignon, Allyson Cabral, Clarissa Coda Dos Santos Cavalcanti Marques, João Paixão, Lis Custódio, Marcos Lage, Maria Andrade, Renata Nascimento, Scarlett de Botton, Sinésio Pesco, Hélio Lopes, Vinícius Mello, Adelailson Peixoto, Dimas Martínez Morera

Proceedings of the SIBGRAPI 2010, 2010

Investigating Euclidean Mappings for CIEDE2000 Color Difference Formula.

Lorenzo Ridolfi, Marcelo Gattass, Hélio Lopes

Proceedings of the 18th Color and Imaging Conference, 2010

2009

On 2D solid α-complexes of Poisson Disc Samplings.

Esdras Medeiros, Luiz Velho, Hélio Lopes, Thomas Lewiner

Int. J. Shape Model., 2009

Learning good views through intelligent galleries.

Thales Vieira, Alex Laier Bordignon, Adelailson Peixoto, Geovan Tavares, Hélio Lopes, Luiz Velho, Thomas Lewiner

Comput. Graph. Forum, 2009

Random Walks for Vector Field Denoising.

João Paixão, Marcos Lage, Fabiano Petronetto, Alex Laier Bordignon, Sinésio Pesco, Geovan Tavares, Thomas Lewiner, Hélio Lopes

Proceedings of the SIBGRAPI 2009, 2009

Support Vectors Learning for Vector Field Reconstruction.

Marcos Lage, Rener Castro, Fabiano Petronetto, Alex Laier Bordignon, Geovan Tavares, Thomas Lewiner, Hélio Lopes

Proceedings of the SIBGRAPI 2009, 2009

2008

Statistical optimization of octree searches.

Rener Castro, Thomas Lewiner, Hélio Lopes, Geovan Tavares, Alex Laier Bordignon

Comput. Graph. Forum, 2008

Approximations by Smooth Transitions in Binary Space Partitions.

Marcos Lage, Alex Laier Bordignon, Fabiano Petronetto, Álvaro Veiga, Geovan Tavares, Thomas Lewiner, Hélio Lopes

Proceedings of the SIBGRAPI 2008, 2008

2007

Regularized Implicit Surface Reconstruction from Points and Normals.

Boris Mederos, M. Laje, S. Arouca, Fabiano Petronetto, Luiz Velho, Thomas Lewiner, Hélio Lopes

J. Braz. Comput. Soc., 2007

2006

Extraction and compression of hierarchical isocontours from image data.

Thomas Lewiner, Hélio Lopes, Luiz Velho, Vinícius Mello

Comput. Medical Imaging Graph., 2006

GEncode: Geometry-driven compression for General Meshes.

Thomas Lewiner, Marcos Craizer, Hélio Lopes, Sinésio Pesco, Luiz Velho, Esdras Soares de Medeiros Filho

Comput. Graph. Forum, 2006

Robust adaptive meshes for implicit surfaces.

Afonso Paiva, Hélio Lopes, Thomas Lewiner, Luiz Henrique de Figueiredo

Proceedings of the 19th Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2006), 2006

Vector field reconstruction from sparse samples with applications.

Marcos Lage, Fabiano Petronetto, Afonso Paiva, Hélio Lopes, Thomas Lewiner, Geovan Tavares

Proceedings of the 19th Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2006), 2006

Point set compression through BSP quantization.

Alex Laier Bordignon, Thomas Lewiner, Hélio Lopes, Geovan Tavares, Rener Castro

Proceedings of the 19th Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2006), 2006

Exploratory visualization based on multidimensional transfer functions and star coordinates.

Alex Laier Bordignon, Rener Castro, Hélio Lopes, Thomas Lewiner, Geovan Tavares

Proceedings of the 19th Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2006), 2006

2005

Curvature and torsion estimators based on parametric curve fitting.

Thomas Lewiner, João D. Gomes Jr., Hélio Lopes, Marcos Craizer

Comput. Graph., 2005

GEncode: Geometry-Driven Compression in Arbitrary Dimension and Co-Dimension.

Thomas Lewiner, Marcos Craizer, Hélio Lopes, Sinésio Pesco, Luiz Velho, Esdras Soares de Medeiros Filho

Proceedings of the 18th Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2005), 2005

CHF: A Scalable Topological Data Structure for Tetrahedral Meshes.

Marcos Lage, Thomas Lewiner, Hélio Lopes, Luiz Velho

Proceedings of the 18th Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2005), 2005

Spider Cursor: a simple versatile interaction tool for data visualization and exploration.

Rosane Minghim, Haim Levkowitz, Luis Gustavo Nonato, Lionis Watanabe, Veridiana Christie Lucas Salvador, Hélio Lopes, Sinésio Pesco, Geovan Tavares

Proceedings of the 3rd International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia 2005, Dunedin, New Zealand, November 29, 2005

2004

Applications of Forman's Discrete Morse Theory to Topology Visualization and Mesh Compression.

Thomas Lewiner, Hélio Lopes, Geovan Tavares

IEEE Trans. Vis. Comput. Graph., 2004

Stellar Mesh Simplification Using Probabilistic Optimization.

Antônio Wilson Vieira, Thomas Lewiner, Luiz Velho, Hélio Lopes, Geovan Tavares

Comput. Graph. Forum, 2004

A stratification approach for modeling two-dimensional cell complexes.

Sinésio Pesco, Geovan Tavares, Hélio Lopes

Comput. Graph., 2004

Simplicial Isosurface Compression.

Thomas Lewiner, Luiz Velho, Hélio Lopes, Vinícius Mello

Proceedings of the 9th International Fall Workshop on Vision, Modeling, and Visualization, 2004

Hierarchical Isocontours Extraction and Compression.

Thomas Lewiner, Luiz Velho, Hélio Lopes, Vinícius Mello

Proceedings of the XVII Brazilian Symposium on Computer Graphics and Image Processing, 2004

Efficient Edgebreaker for Surfaces of Arbitrary Topology.

Thomas Lewiner, Hélio Lopes, Jarek Rossignac, Antônio Wilson Vieira

Proceedings of the XVII Brazilian Symposium on Computer Graphics and Image Processing, 2004

Arc-Length Based Curvature Estimator.

Thomas Lewiner, João D. Gomes Jr., Hélio Lopes, Marcos Craizer

Proceedings of the XVII Brazilian Symposium on Computer Graphics and Image Processing, 2004

Restricted BPA: Applying Ball-Pivoting on the Plane.

Esdras Soares de Medeiros Filho, Luiz Velho, Hélio Lopes

Proceedings of the XVII Brazilian Symposium on Computer Graphics and Image Processing, 2004

2003

Efficient Implementation of Marching Cubes' Cases with Topological Guarantees.

Thomas Lewiner, Hélio Lopes, Antônio Wilson Vieira, Geovan Tavares

J. Graphics, GPU, & Game Tools, 2003

Handlebody Representation for Surfaces and Its Applications to Terrain Modeling.

Hélio Lopes, Sinésio Pesco, Geovan Tavares, M. Maia, Atila Xavier

Int. J. Shape Model., 2003

Toward Optimality in Discrete Morse Theory.

Thomas Lewiner, Hélio Lopes, Geovan Tavares

Exp. Math., 2003

Optimal discrete Morse functions for 2-manifolds.

Thomas Lewiner, Hélio Lopes, Geovan Tavares

Comput. Geom., 2003

Edgebreaker: a simple implementation for surfaces with handles.

Hélio Lopes, Jarek Rossignac, Alla Safonova, Andrzej Szymczak, Geovan Tavares

Comput. Graph., 2003

Fast Stellar Mesh Simplification.

Antônio Wilson Vieira, Luiz Velho, Hélio Lopes, Geovan Tavares, Thomas Lewiner

Proceedings of the 16th Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2003), 2003

A Topological Framework for Advancing Front Triangulation.

Esdras Soares de Medeiros Filho, Luiz Velho, Hélio Lopes

Proceedings of the 16th Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2003), 2003

2002

Robust adaptive polygonal approximation of implicit curves.

Hélio Lopes, João Batista S. de Oliveira, Luiz Henrique de Figueiredo

Comput. Graph., 2002

Visualizing Forman's Discrete Vector Field.

Thomas Lewiner, Hélio Lopes, Geovan Tavares

Proceedings of the Third International Workshop "Visualization and Mathematics", 2002

Edgebreaker: a simple compression for surfaces with handles.

Hélio Lopes, Geovan Tavares, Jarek Rossignac, Andrzej Szymczak, Alla Safonova

Proceedings of the Seventh ACM Symposium on Solid Modeling and Applications, 2002

2001

Extraction of Terrain Data from Digitised Contours.

M. Maia, Atila Xavier, Hélio Lopes, Sinésio Pesco, Geovan Tavares

Int. J. Shape Model., 2001

Robust Adaptive Approximation of Implicit Curves.

Hélio Lopes, João Batista S. de Oliveira, Luiz Henrique de Figueiredo

Proceedings of the 14th Brazilian Symposium on Computer Graphics and Image Processing (SIBGRAPI 2001), 2001

1997

Structural Operators for Modeling 3-Manifolds.

Hélio Lopes, Geovan Tavares

Proceedings of the Fourth Symposium on Solid Modeling and Applications, 1997