Helder Araújo

Orcid: 0000-0002-9544-424X

Affiliations:
  • University of Coimbra, Institute for Systems and Robotics, Department of Electrical and Computer Engineering, Portugal


According to our database1, Helder Araújo authored at least 128 papers between 1989 and 2025.

Collaborative distances:
  • Dijkstra number2 of four.
  • Erdős number3 of four.

Timeline

Legend:

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PhD thesis 
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Bibliography

2025
RetSeg3D: Retention-based 3D semantic segmentation for autonomous driving.
Comput. Vis. Image Underst., 2025

2024
DeLiVoTr: Deep and light-weight voxel transformer for 3D object detection.
Intell. Syst. Appl., 2024

SRFDet3D: Sparse Region Fusion based 3D Object Detection.
Neurocomputing, 2024

A Survey on Group Fairness in Federated Learning: Challenges, Taxonomy of Solutions and Directions for Future Research.
CoRR, 2024

Unveiling Group-Specific Distributed Concept Drift: A Fairness Imperative in Federated Learning.
CoRR, 2024

DAFDeTr: Deformable Attention Fusion Based 3D Detection Transformer.
Proceedings of the Robotics, Computer Vision and Intelligent Systems, 2024

2023
Li3DeTr: A LiDAR based 3D Detection Transformer.
Proceedings of the IEEE/CVF Winter Conference on Applications of Computer Vision, 2023

APH-YOLOv7t: A YOLO Attention Prediction Head for Search and Rescue with Drones.
Proceedings of the Robot 2023: Sixth Iberian Robotics Conference, 2023

3D Motion Estimation of Volumetric Deformable Objects from RGB-D Images Synthetically Generated by a Multi-camera System.
Proceedings of the Robot 2023: Sixth Iberian Robotics Conference, 2023

FAIR-FATE: Fair Federated Learning with Momentum.
Proceedings of the Computational Science - ICCS 2023, 2023

Benchmarking Convolutional Neural Network Inference on Low-Power Edge Devices.
Proceedings of the IEEE International Conference on Acoustics, 2023

Local Forward-Motion Panoramic Views for Localization and Lesion Detection for Multi-Camera Wireless Capsule Endoscopy Videos.
Proceedings of the 16th International Joint Conference on Biomedical Engineering Systems and Technologies, 2023

2022
An Experimental Assessment of Depth Estimation in Transparent and Translucent Scenes for Intel RealSense D415, SR305 and L515.
Sensors, 2022

MSF3DDETR: Multi-Sensor Fusion 3D Detection Transformer for Autonomous Driving.
CoRR, 2022

Gripper positioning for object deformation tasks.
Proceedings of the 2022 International Conference on Robotics and Automation, 2022

2021
EndoSLAM dataset and an unsupervised monocular visual odometry and depth estimation approach for endoscopic videos.
Medical Image Anal., 2021

FAWOS: Fairness-Aware Oversampling Algorithm Based on Distributions of Sensitive Attributes.
IEEE Access, 2021

Registration of Consecutive Frames From Wireless Capsule Endoscopy for 3D Motion Estimation.
IEEE Access, 2021

Intel RealSense SR305, D415 and L515: Experimental Evaluation and Comparison of Depth Estimation.
Proceedings of the 16th International Joint Conference on Computer Vision, 2021

3D Reconstruction of Deformable Objects from RGB-D Cameras: An Omnidirectional Inward-facing Multi-camera System.
Proceedings of the 16th International Joint Conference on Computer Vision, 2021

2020
Quantitative Evaluation of Endoscopic SLAM Methods: EndoSLAM Dataset.
CoRR, 2020

SL3D - Single Look 3D Object Detection based on RGB-D Images.
Proceedings of the Digital Image Computing: Techniques and Applications, 2020

2019
Cyber-security Modbus ICS dataset.
Dataset, January, 2019

A robust and efficient framework for fast cylinder detection.
Robotics Auton. Syst., 2019

Learning to Navigate Endoscopic Capsule Robots.
IEEE Robotics Autom. Lett., 2019

Dynamic Obstacle Detection in Traffic Environments.
Proceedings of the 13th International Conference on Distributed Smart Cameras, 2019

2018
Robustified Structure from Motion with rolling-shutter camera using straightness constraint.
Pattern Recognit. Lett., 2018

Biologically inspired computational modeling of motion based on middle temporal area.
Paladyn J. Behav. Robotics, 2018

Sparse-then-dense alignment-based 3D map reconstruction method for endoscopic capsule robots.
Mach. Vis. Appl., 2018

Deep EndoVO: A recurrent convolutional neural network (RCNN) based visual odometry approach for endoscopic capsule robots.
Neurocomputing, 2018

Cross-Validation for Imbalanced Datasets: Avoiding Overoptimistic and Overfitting Approaches [Research Frontier].
IEEE Comput. Intell. Mag., 2018

On the advantages of foveal mechanisms for active stereo systems in visual search tasks.
Auton. Robots, 2018

Magnetic- Visual Sensor Fusion-based Dense 3D Reconstruction and Localization for Endoscopic Capsule Robots.
Proceedings of the 2018 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2018

Exploring the Effects of Data Distribution in Missing Data Imputation.
Proceedings of the Advances in Intelligent Data Analysis XVII, 2018

EndoSensorFusion: Particle Filtering-Based Multi-Sensory Data Fusion with Switching State-Space Model for Endoscopic Capsule Robots.
Proceedings of the 2018 IEEE International Conference on Robotics and Automation, 2018

Denial of Service Attacks: Detecting the Frailties of Machine Learning Algorithms in the Classification Process.
Proceedings of the Critical Information Infrastructures Security, 2018

2017
Patch-based reconstruction of surfaces undergoing different types of deformations.
Signal Image Video Process., 2017

A deep learning based fusion of RGB camera information and magnetic localization information for endoscopic capsule robots.
Int. J. Intell. Robotics Appl., 2017

A non-rigid map fusion-based direct SLAM method for endoscopic capsule robots.
Int. J. Intell. Robotics Appl., 2017

SDP-based approach to monocular reconstruction of inextensible surfaces.
IET Comput. Vis., 2017

A fully dense and globally consistent 3D map reconstruction approach for GI tract to enhance therapeutic relevance of the endoscopic capsule robot.
CoRR, 2017

Six Degree-of-Freedom Localization of Endoscopic Capsule Robots using Recurrent Neural Networks embedded into a Convolutional Neural Network.
CoRR, 2017

A Non-Rigid Map Fusion-Based RGB-Depth SLAM Method for Endoscopic Capsule Robots.
CoRR, 2017

Efficient Resource Allocation for Sparse Multiple Object Tracking.
Proceedings of the 12th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (VISIGRAPP 2017) - Volume 6: VISAPP, Porto, Portugal, February 27, 2017

Shape-based attention for identification and localization of cylindrical objects.
Proceedings of the 2017 Joint IEEE International Conference on Development and Learning and Epigenetic Robotics, 2017

Influence of Data Distribution in Missing Data Imputation.
Proceedings of the Artificial Intelligence in Medicine, 2017

2016
Estimation of mirror shape and extrinsic parameters in axial non-central catadioptric systems.
Image Vis. Comput., 2016

From D-RGB-based reconstruction toward a mesh deformation model for monocular reconstruction of isometric surfaces.
EURASIP J. Image Video Process., 2016

Plücker correction problem: Analysis and improvements in efficiency.
Proceedings of the 23rd International Conference on Pattern Recognition, 2016

3D Reconstruction with Low Resolution, Small Baseline and High Radial Distortion Stereo Images.
Proceedings of the 10th International Conference on Distributed Smart Camera, 2016

3D Estimation of Extensible Surfaces Through a Local Monocular Reconstruction Technique.
Proceedings of the Computer Vision - ACCV 2016 Workshops, 2016

2015
Pose Estimation for General Cameras Using Lines.
IEEE Trans. Cybern., 2015

Direct Solution to the Minimal Generalized Pose.
IEEE Trans. Cybern., 2015

Pose Estimation for Non-Central Cameras Using Planes.
J. Intell. Robotic Syst., 2015

Investigating new calibration methods without feature detection for TOF cameras.
Image Vis. Comput., 2015

Generalized essential matrix: Properties of the singular value decomposition.
Image Vis. Comput., 2015

2014
Efficient Iterative Pose Estimation Using an Invariant to Rotations.
IEEE Trans. Cybern., 2014

Visual servoing of mobile robots using non-central catadioptric cameras.
Robotics Auton. Syst., 2014

3D Estimation of Isometric Surfaces Using a ToF-Based Approach.
Proceedings of the Advances in Visual Computing - 10th International Symposium, 2014

Planar pose estimation for general cameras using known 3D lines.
Proceedings of the 2014 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2014

A simple and robust solution to the minimal general pose estimation.
Proceedings of the 2014 IEEE International Conference on Robotics and Automation, 2014

A ToF-Aided Approach to 3D Mesh-Based Reconstruction of Isometric Surfaces.
Proceedings of the Pattern Recognition Applications and Methods, 2014

Structure from Motion - ToF-aided 3D Reconstruction of Isometric Surfaces.
Proceedings of the ICPRAM 2014, 2014

Multi-modal Sensors Path Merging.
Proceedings of the Intelligent Autonomous Systems 13, 2014

2013
Robust image-based visual servoing using invariant visual information.
Robotics Auton. Syst., 2013

Calibration of Smooth Camera Models.
IEEE Trans. Pattern Anal. Mach. Intell., 2013

Calibration of mirror position and extrinsic parameters in axial non-central catadioptric systems.
Comput. Vis. Image Underst., 2013

Image-based servoing of non-holonomic vehicles using non-central catadioptric cameras.
Proceedings of the 9th Workshop on Robot Motion and Control, 2013

Efficient decoupled pose estimation from a set of points.
Proceedings of the 2013 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2013

2012
Link quality estimation in wireless multi-hop networks using Kernel based methods.
Comput. Networks, 2012

Non-central catadioptric cameras visual servoing for mobile robots using a radial camera model.
Proceedings of the 2012 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2012

Reconstruction of 3D lines from a single axial catadioptric image using cross-ratio.
Proceedings of the 21st International Conference on Pattern Recognition, 2012

2011
Point-based calibration using a parametric representation of the general imaging model.
Proceedings of the IEEE International Conference on Computer Vision, 2011

2010
Active Stereo Tracking of Nle 3 Targets Using Line Scan Cameras.
IEEE Trans. Robotics, 2010

Bio-inspired Binocular Disparity with Position-Shift Receptive Field.
Proceedings of the Emerging Trends in Technological Innovation, 2010

2009
Estimating parameters of noncentral catadioptric systems using bundle adjustment.
Comput. Vis. Image Underst., 2009

Attention Models for Vergence Movements based on the JAMF Framework and the POPEYE Robot.
Proceedings of the VISAPP 2009 - Proceedings of the Fourth International Conference on Computer Vision Theory and Applications, Lisboa, Portugal, February 5-8, 2009, 2009

Active stereo tracking of multiple free-moving targets.
Proceedings of the 2009 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR 2009), 2009

2008
The Experimental Robotics Framework.
Proceedings of the Simulation, 2008

Calibration and Pose Estimation of a Pox-slits Camera from a Single Image.
Proceedings of the Advances in Visual Computing, 4th International Symposium, 2008

2007
Linear solution for the pose estimation of noncentral catadioptric systems.
Proceedings of the IEEE 11th International Conference on Computer Vision, 2007

2006
Fitting conics to paracatadioptric projections of lines.
Comput. Vis. Image Underst., 2006

Active vision systems and catadioptric vision systems for robotic applications.
Proceedings of the Computational Modeling of Objects Represented in Images-Fundamentals, 2006

2005
Geometric Properties of Central Catadioptric Line Images and Their Application in Calibration.
IEEE Trans. Pattern Anal. Mach. Intell., 2005

A Stereovision Method for Obstacle Detection and Tracking in Non-Flat Urban Environments.
Auton. Robots, 2005

A Calibration Algorithm for POX-Slits Camera.
Proceedings of the Pattern Recognition and Image Analysis, Second Iberian Conference, 2005

2004
A General Framework for the Selection of World Coordinate Systems in Perspective and Catadioptric Imaging Applications.
Int. J. Comput. Vis., 2004

Rigid Motion Estimation from Non-Central Catadioptric Images.
Proceedings of the 17th International Conference on Pattern Recognition, 2004

Projection Model, 3D Reconstruction and Rigid Motion Estimation from Non-Central Catadioptric Images.
Proceedings of the 2nd International Symposium on 3D Data Processing, 2004

2003
Analysis and comparison of two methods for the estimation of 3D motion parameters.
Robotics Auton. Syst., 2003

A review on egomotion by means of differential epipolar geometry applied to the movement of a mobile robot.
Pattern Recognit., 2003

Paracatadioptric Camera Calibration Using Lines.
Proceedings of the 9th IEEE International Conference on Computer Vision (ICCV 2003), 2003

Mirror shape recovery from image curves and intrinsic parameters: Rotationally symmetric and conic mirrors.
Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, 2003

Direct Least Square Fitting of Paracatadioptric Line Images.
Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition, 2003

2002
Estimation of 3D motion from stereo images-uncertainty analysis and experimental results.
Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems, Lausanne, Switzerland, September 30, 2002

Pose Estimation for Central Catadioptric Systems: An Analytical Approach.
Proceedings of the 16th International Conference on Pattern Recognition, 2002

Estimation of 3D Motion from Stereo Images- Differential and Discrete Formulations.
Proceedings of the 16th International Conference on Pattern Recognition, 2002

Differential Epipolar Constraint in Mobile Robot Egomotion Estimation.
Proceedings of the 16th International Conference on Pattern Recognition, 2002

Geometric Properties of Central Catadioptric Line Images.
Proceedings of the Computer Vision, 2002

2001
Real-time human activity monitoring exploring multiple vision sensors.
Robotics Auton. Syst., 2001

Intelligent Robotic Systems - SIRS'99.
Robotics Auton. Syst., 2001

Maintaining the relative positions and orientations of multiple robots using vision.
Pattern Recognit. Lett., 2001

Issues on the Geometry of Central Catadioptric Image Formation.
Proceedings of the 2001 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR 2001), 2001

2000
Integration of information from several vision systems for a common task of surveillance.
Robotics Auton. Syst., 2000

A Focusing-by-Vergence System Controlled by Retinal Motion Disparity.
Proceedings of the 2000 IEEE International Conference on Robotics and Automation, 2000

A Surveillance System Integrating Visual Telepresence.
Proceedings of the 15th International Conference on Pattern Recognition, 2000

Binocular Tracking and Accommodation Controlled by Retinal Motion Flow.
Proceedings of the 15th International Conference on Pattern Recognition, 2000

Model Predictive Control to Improve Visual Control of Motion: Applications in Active Tracking of Moving Targets.
Proceedings of the 15th International Conference on Pattern Recognition, 2000

1999
Iterative multistep explicit camera calibration.
IEEE Trans. Robotics Autom., 1999

Combination of Several Vision Sensors for Interpretation of Human Actions.
Proceedings of the Experimental Robotics VI, 1999

Tracking multiple objects in 3D.
Proceedings of the Proceedings 1999 IEEE/RSJ International Conference on Intelligent Robots and Systems. Human and Environment Friendly Robots with High Intelligence and Emotional Quotients, 1999

Improving 3D Active Visual Tracking.
Proceedings of the Computer Vision Systems, First International Conference, 1999

1998
Simulating pursuit with machine experiments with robots and artificial vision.
IEEE Trans. Robotics Autom., 1998

A Fully Projective Formulation to Improve the Accuracy of Lowe's Pose-Estimation Algorithm.
Comput. Vis. Image Underst., 1998

Control performance issues in a binocular active vision system.
Proceedings of the Proceedings 1998 IEEE/RSJ International Conference on Intelligent Robots and Systems. Innovations in Theory, 1998

A surveillance system combining peripheral and foveated motion tracking.
Proceedings of the Fourteenth International Conference on Pattern Recognition, 1998

Iterative Multi-Step Explicit Camera Calibration.
Proceedings of the Sixth International Conference on Computer Vision (ICCV-98), 1998

1997
Optical Normal Flow Estimation on Log-polar Images. A Solution for Real-Time Binocular Vision.
Real Time Imaging, 1997

Real-time vergence and binocular gaze control.
Proceedings of the 1997 IEEE/RSJ International Conference on Intelligent Robot and Systems. Innovative Robotics for Real-World Applications. IROS '97, 1997

Real-time visual behaviors with a binocular active vision system.
Proceedings of the 1997 IEEE International Conference on Robotics and Automation, 1997

1996
Pose view stability analysis for camera look angles computation.
Proceedings of the 13th International Conference on Pattern Recognition, 1996

Pursuit control in a binocular active vision system using optical flow.
Proceedings of the 13th International Conference on Pattern Recognition, 1996

1995
Low Cost Sensor Based Obstacle Deteciton and Description: Experiments with Mobile Robots using Grid Representation.
Proceedings of the Experimental Robotics IV, The 4th International Symposium, Stanford, California, USA, June 30, 1995

Simulating Pursuit with Machines Experiments with Robots and Artificial Vision.
Proceedings of the 1995 International Conference on Robotics and Automation, 1995

1993
Monoplanar Camera Calibration.
Proceedings of the British Machine Vision Conference, 1993

1991
Improving camera calibration by using multiple frames in hand-eye robotic systems.
Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems, 1991

Depth recovery using active focus in robotics [vision].
Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems, 1991

1989
Metodologias para a análise de texturas baseadas no conceito de memória associativa
PhD thesis, 1989


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