All Stories

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

    Article • Sensors, September 2022, MDPI AG

    Prof Helder Araujo

  2. 3D Reconstruction of Deformable Objects from RGB-D Cameras: An Omnidirectional Inward-facing Multi-camera System

    Article • January 2021, Scitepress

    Prof Helder Araujo

  3. FAWOS: Fairness-Aware Oversampling Algorithm Based on Distributions of Sensitive Attributes

    Article • IEEE Access, January 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  4. Intel RealSense SR305, D415 and L515: Experimental Evaluation and Comparison of Depth Estimation

    Article • January 2021, Scitepress

    Prof Helder Araujo

  5. Registration of Consecutive Frames From Wireless Capsule Endoscopy for 3D Motion Estimation

    Article • IEEE Access, January 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  6. SL3D - Single Look 3D Object Detection based on RGB-D Images

    Article • November 2020, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  7. Omnidirectional Vision

    Article • January 2020, Springer Science + Business Media

    Prof Helder Araujo

  8. Wireless Capsule Endoscope Location and a Robotic Validation Experiment

    Article • September 2019, Springer Science + Business Media

    Prof Helder Araujo

  9. Dynamic Obstacle Detection in Traffic Environments

    Article • September 2019, ACM (Association for Computing Machinery)

    Prof Helder Araujo

  10. Learning to Navigate Endoscopic Capsule Robots

    Article • IEEE Robotics and Automation Letters, July 2019, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  11. A robust and efficient framework for fast cylinder detection

    Article • Robotics and Autonomous Systems, July 2019, Elsevier

    Prof Helder Araujo

  12. Denial of Service Attacks: Detecting the Frailties of Machine Learning Algorithms in the Classification Process

    Article • December 2018, Springer Science + Business Media

    Prof Helder Araujo

  13. Magnetic- Visual Sensor Fusion-based Dense 3D Reconstruction and Localization for Endoscopic Capsule Robots

    Article • October 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  14. EndoSensorFusion: Particle Filtering-Based Multi-Sensory Data Fusion with Switching State-Space Model for Endoscopic Capsule Robots

    Article • May 2018, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  15. Biologically inspired computational modeling of motion based on middle temporal area

    Article • Paladyn Journal of Behavioral Robotics, April 2018, De Gruyter

    Prof Helder Araujo

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

    Article • Neurocomputing, January 2018, Elsevier

    Prof Helder Araujo

  17. On the advantages of foveal mechanisms for active stereo systems in visual search tasks

    Article • Autonomous Robots, February 2017, Springer Science + Business Media

    Prof Helder Araujo

  18. SDP-based approach to monocular reconstruction of inextensible surfaces

    Article • IET Computer Vision, February 2017, the Institution of Engineering and Technology (the IET)

    Prof Helder Araujo

  19. Efficient Resource Allocation for Sparse Multiple Object Tracking

    Article • January 2017, Scitepress

    Prof Helder Araujo

  20. Plücker correction problem: Analysis and improvements in efficiency

    Article • December 2016, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  21. Estimation of mirror shape and extrinsic parameters in axial non-central catadioptric systems

    Article • Image and Vision Computing, July 2016, Elsevier

    Prof Helder Araujo

  22. From D-RGB-based reconstruction toward a mesh deformation model for monocular reconstruction of isometric surfaces

    Article • EURASIP Journal on Image and Video Processing, March 2016, Springer Science + Business Media

    Prof Helder Araujo

  23. Investigating new calibration methods without feature detection for TOF cameras

    Article • Image and Vision Computing, November 2015, Elsevier

    Prof Helder Araujo

  24. Neural correlates of different self domains

    Article • Brain and Behavior, October 2015, Wiley

    Prof Helder Araujo

  25. Multi-modal Sensors Path Merging

    Article • September 2015, Springer Science + Business Media

    Prof Helder Araujo

  26. Pose Estimation for Non-Central Cameras Using Planes

    Article • Journal of Intelligent & Robotic Systems, March 2015, Springer Science + Business Media

    Prof Helder Araujo

  27. Generalized essential matrix: Properties of the singular value decomposition

    Article • Image and Vision Computing, February 2015, Elsevier

    Prof Helder Araujo

  28. A ToF-Aided Approach to 3D Mesh-Based Reconstruction of Isometric Surfaces

    Article • January 2015, Springer Science + Business Media

    Prof Helder Araujo

  29. Visual servoing of mobile robots using non-central catadioptric cameras

    Article • Robotics and Autonomous Systems, November 2014, Elsevier

    Prof Helder Araujo

  30. Planar pose estimation for general cameras using known 3D lines

    Article • September 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  31. Involvement of cortical midline structures in the processing of autobiographical information

    Article • PeerJ, July 2014, PeerJ

    Prof Helder Araujo

  32. Pose estimation for non-central cameras using planes

    Article • May 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  33. A simple and robust solution to the minimal general pose estimation

    Article • May 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  34. Efficient Iterative Pose Estimation Using an Invariant to Rotations

    Article • IEEE Transactions on Cybernetics, February 2014, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  35. 3D Estimation of Isometric Surfaces Using a ToF-Based Approach

    Article • January 2014, Springer Science + Business Media

    Prof Helder Araujo

  36. Stereoscopic Depth Perception Using a Model Based on the Primary Visual Cortex

    Article • PLoS ONE, December 2013, PLOS

    Prof Helder Araujo

  37. Robust image-based visual servoing using invariant visual information

    Article • Robotics and Autonomous Systems, December 2013, Elsevier

    Prof Helder Araujo

  38. Efficient decoupled pose estimation from a set of points

    Article • November 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  39. Automatic concrete health monitoring: assessment and monitoring of concrete surfaces

    Article • Structure and Infrastructure Engineering, September 2013, Taylor & Francis

    Prof Helder Araujo, Jónatas Valença

  40. Calibration of Smooth Camera Models

    Article • IEEE Transactions on Pattern Analysis and Machine Intelligence, September 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  41. Calibration of mirror position and extrinsic parameters in axial non-central catadioptric systems

    Article • Computer Vision and Image Understanding, August 2013, Elsevier

    Prof Helder Araujo

  42. Image-based servoing of non-holonomic vehicles using non-central catadioptric cameras

    Article • July 2013, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  43. Automatic crack monitoring using photogrammetry and image processing

    Article • Measurement, January 2013, Elsevier

    Prof Helder Araujo

  44. Cortical Midline Structures and Autobiographical-Self Processes: An Activation-Likelihood Estimation Meta-Analysis

    Article • Frontiers in Human Neuroscience, January 2013, Frontiers

    Prof Helder Araujo

  45. Link quality estimation in wireless multi-hop networks using Kernel based methods

    Article • Computer Networks, November 2012, Elsevier

    Prof Helder Araujo

  46. Non-central catadioptric cameras visual servoing for mobile robots using a radial camera model

    Article • October 2012, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  47. Comparison of Classification Methods for Golf Putting Performance Analysis

    Article • August 2012, Springer Science + Business Media

    Dr Micael S. Couceiro, Prof Helder Araujo

  48. Point-based calibration using a parametric representation of the general imaging model

    Article • November 2011, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  49. Applications of Photogrammetry to Structural Assessment

    Article • Experimental Techniques, April 2011, Springer Science + Business Media

    Prof Helder Araujo

  50. Imaging Methodologies

    Article • November 2010, Taylor & Francis

    Prof Helder Araujo

  51. Active Stereo Tracking of $N\le 3$ Targets Using Line Scan Cameras

    Article • IEEE Transactions on Robotics, June 2010, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  52. Visual Servoing and Pose Estimation with Cameras Obeying the Unified Model

    Article • January 2010, Springer Science + Business Media

    Prof Helder Araujo

  53. Bio-inspired Binocular Disparity with Position-Shift Receptive Field

    Article • January 2010, Springer Science + Business Media

    Prof Helder Araujo

  54. Computer Vision, Imaging and Computer Graphics. Theory and Applications

    Article • January 2010

    Prof Helder Araujo, Professor João Manuel R.S. Tavares

  55. Active stereo tracking of multiple free-moving targets

    Article • June 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  56. Active stereo tracking of multiple free-moving targets

    Article • June 2009, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  57. Pattern Recognition and Image Analysis

    Article • January 2009, Springer Science + Business Media

    Prof Helder Araujo

  58. Computer Vision and Computer Graphics. Theory and Applications

    Article • January 2009

    Prof Helder Araujo

  59. Estimating parameters of noncentral catadioptric systems using bundle adjustment

    Article • Computer Vision and Image Understanding, January 2009, Elsevier

    Prof Helder Araujo

  60. The Experimental Robotics Framework

    Article • January 2008, Springer Science + Business Media

    Prof Helder Araujo

  61. Computer Vision and Computer Graphics. Theory and Applications

    Article • January 2008

    Prof Helder Araujo

  62. Calibration and Pose Estimation of a Pox-slits Camera from a Single Image

    Article • January 2008, Springer Science + Business Media

    Prof Helder Araujo

  63. Low-cost method for the estimation of the shape of quadric mirrors and calibration of catadioptric cameras

    Article • Optical Engineering, July 2007, SPIE

    Prof Helder Araujo

  64. Advances in Computer Graphics and Computer Vision

    Article • January 2007

    Prof Helder Araujo

  65. Linear solution for the pose estimation of noncentral catadioptric systems

    Article • January 2007, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  66. Fitting conics to paracatadioptric projections of lines

    Article • Computer Vision and Image Understanding, March 2006, Elsevier

    Prof Helder Araujo

  67. INFORMATICS IN CONTROL, AUTOMATION AND ROBOTICS I

    Article • January 2006, Springer Science + Business Media

    Prof Helder Araujo

  68. A Stereovision Method for Obstacle Detection and Tracking in Non-Flat Urban Environments

    Article • Autonomous Robots, September 2005, Springer Science + Business Media

    Prof Helder Araujo

  69. Geometric properties of central catadioptric line images and their application in calibration

    Article • IEEE Transactions on Pattern Analysis and Machine Intelligence, August 2005, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  70. A Calibration Algorithm for POX-Slits Camera

    Article • January 2005, Springer Science + Business Media

    Prof Helder Araujo

  71. A General Framework for the Selection of World Coordinate Systems in Perspective and Catadioptric Imaging Applications

    Article • International Journal of Computer Vision, April 2004, Springer Science + Business Media

    Prof Helder Araujo

  72. Rigid motion estimation from non-central catadioptric images

    Article • January 2004, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  73. A review on egomotion by means of differential epipolar geometry applied to the movement of a mobile robot

    Article • Pattern Recognition, December 2003, Elsevier

    Prof Helder Araujo

  74. Analysis and comparison of two methods for the estimation of 3D motion parameters

    Article • Robotics and Autonomous Systems, October 2003, Elsevier

    Prof Helder Araujo

  75. Mirror shape recovery from image curves and intrinsic parameters: Rotationally symmetric and conic mirrors

    Article • June 2003, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  76. Direct Least Square Fitting of Paracatadioptric Line Images

    Article • June 2003, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  77. Geometric Properties of Central Catadioptric Line Images

    Article • January 2002, Springer Science + Business Media

    Prof Helder Araujo

  78. Maintaining the relative positions and orientations of multiple robots using vision

    Article • Pattern Recognition Letters, October 2001, Elsevier

    Prof Helder Araujo

  79. Intelligent Robotic Systems — SIRS’99

    Article • Robotics and Autonomous Systems, June 2001, Elsevier

    Prof Helder Araujo

  80. Real-time human activity monitoring exploring multiple vision sensors

    Article • Robotics and Autonomous Systems, June 2001, Elsevier

    Prof Helder Araujo

  81. Integration of information from several vision systems for a common task of surveillance

    Article • Robotics and Autonomous Systems, April 2000, Elsevier

    Prof Helder Araujo

  82. Combination of several vision sensors for interpretation of human actions

    Article • January 2000, Springer Science + Business Media

    Prof Helder Araujo

  83. An automatic optical sensor for vessels and fibbers quality inspection in pulp production

    Article • Computers & Industrial Engineering, October 1999, Elsevier

    Prof Helder Araujo

  84. An automatic system for dirt in pulp inspection using hierarchical image segmentation

    Article • Computers & Industrial Engineering, October 1999, Elsevier

    Prof Helder Araujo

  85. Improving 3D Active Visual Tracking

    Article • January 1999, Springer Science + Business Media

    Prof Helder Araujo

  86. Iterative multistep explicit camera calibration

    Article • IEEE Transactions on Robotics and Automation, January 1999, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  87. A Fully Projective Formulation to Improve the Accuracy of Lowe's Pose-Estimation Algorithm

    Article • Computer Vision and Image Understanding, May 1998, Elsevier

    Prof Helder Araujo

  88. Active vision for autonomous systems

    Article • January 1998, Springer Science + Business Media

    Prof Helder Araujo

  89. Simulating pursuit with machine experiments with robots and artificial vision

    Article • IEEE Transactions on Robotics and Automation, January 1998, Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  90. Visual behaviors for real-time control of a binocular active vision system

    Article • Control Engineering Practice, October 1997, Elsevier

    Prof Helder Araujo

  91. Grid-based framework for sensorial data integration in mobile robots

    Article • September 1997, SPIE

    Prof Helder Araujo

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

    Article • Real-Time Imaging, June 1997, Elsevier

    Prof Helder Araujo

  93. Low cost sensor based obstacle detection and description

    Article • January 1997, Springer Science + Business Media

    Prof Helder Araujo

  94. Multi-Sensor Integration for Mobile Robot Navigation

    Article • January 1995, Springer Science + Business Media

    Prof Helder Araujo

  95. Study of transparency and coherence of motion in image sequences

    Article • May 1994, SPIE

    Prof Helder Araujo

  96. The interaction of luminance, velocity, and shape information in the perception of motion transparency, coherence, and non-rigid motion

    Article • Spatial Vision, January 1993, Brill

    Prof Helder Araujo

  97. Depth perception by controlling focus

    Article • April 1992, SPIE

    Prof Helder Araujo

  98. Projection model, 3D reconstruction and rigid motion estimation from non-central catadioptric images

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  99. Differential epipolar constraint in mobile robot egomotion estimation

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  100. Estimation of 3d motion from stereo images - differential and discrete formulations

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  101. Pose estimation for central catadioptric systems: an analytical approach

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  102. Issues on the geometry of central catadioptric image formation

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  103. A surveillance system integrating visual telepresence

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  104. Binocular tracking and accommodation controlled by retinal motion flow

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  105. Model predictive control to improve visual control of motion: applications in active tracking of moving targets

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  106. A surveillance system combining peripheral and foveated motion tracking

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  107. Iterative multi-step explicit camera calibration

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  108. Real-time visual behaviors with a binocular active vision system

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  109. Simulating pursuit with machines. Experiments with robots and artificial vision

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo

  110. Using an active vision system to compute time-until-impact

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Prof Helder Araujo