Pedro A. D. Martins PhD, Researcher Institute of Systems and Robotics (ISR) University of Coimbra, Portugal pedromartins@isr.uc.pt

Research Videos

Publications

Journals

Ensuring Academic Integrity and Trust in Online Learning Environments:
A Longitudinal Study of an AI-centered Proctoring System in Tertiary Educational Institutions (link)
C. Fidas, M. Belk, A. Constantinides, D. Portugal, P. Martins, A. Pietron, A. Pitsillides, N. Avouris
Education Sciences MDPI, volume 13, number 6, June 2023

Continuous User Identification in Distance Learning: A Recent Technology Perspective (link)
D. Portugal, J. Faria, M. Belk, P. Martins, A. Constantinides, A. Pietron, A. Pitsillides, N. Avouris, C. A. Fidas
Smart Learning Environments Springer Journal, volume 10, issue 1, July 2023

Gradient Shape Model (PDF) (link)
P. Martins, J. Henriques, J. Batista
International Journal of Computer Vision (IJCV), volume 128, issue 12, December 2020, pages 2828-2848

Bayesian Constrained Local Models Revisited (PDF) (link) (videos)
P. Martins, J. F. Henriques, R. Caseiro, J. Batista
IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI), volume 38, issue 4, April 2016, pages 704-716

High-Speed Tracking with Kernelized Correlation Filters (PDF) (link) (code) (code-opencv)
J. F. Henriques, R. Caseiro, P. Martins, J. Batista
IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI), volume 37, issue 3, March 2015, pages 583-596

Generative Face Alignment Through 2.5D Active Appearance Models (PDF) (link) (supplement) (videos)
P. Martins, R. Caseiro, J. Batista
Computer Vision and Image Understanding (CVIU), Elsevier Journal, volume 117, issue 3, March 2013, pages 250-268

A Nonparametric Riemannian Framework on Tensor Field with Application to Foreground Segmentation (link)
R. Caseiro, P. Martins, J. F. Henriques, J. Batista
Pattern Recognition (PR), Elsevier Journal, volume 45, issue 11, November 2012, pages 3997-4017

Conferences

Neuromorphic Event-based Face Identity Recognition
G. Moreira, A. Graça, B. Silva, P. Martins, J. Batista
International Conference on Pattern Recognition (ICPR) 2022

Cascaded Nonlinear Shape Model Regression (PDF) (slides) (video)
P. Martins, B. Silva, J. Batista
IEEE International Conference on Image Processing (ICIP) 2020

Vehicle Occupancy Detection for HOV/HOT Lanes Enforcement
B. Silva, P. Martins, J. Batista
IEEE Intelligent Transportation Systems Conference (ITSC) 2019

Simultaneous Cascaded Regression (PDF) (slides) (video)
P. Martins, J. Batista
IEEE International Conference on Image Processing (ICIP) 2018

Bayesian Constrained Local Models with Depth Data (PDF) (slides) (videos)
P. Martins, J. Faro, P. Brandão, J. Batista
IEEE International Conference on Image Processing (ICIP) 2016 (Oral Presentation)

Multi-Source Domain Adaptation using C1 Smooth Subspaces Interpolation
J. Batista, K. Krakowski, L. Machado, P. Martins, F. S. Leite
IEEE International Conference on Image Processing (ICIP) 2016

Beyond the Shortest Path: Unsupervised Domain Adaptation by Sampling Subspaces Along the Spline Flow
R. Caseiro, J. F. Henriques, P. Martins, J. Batista
IEEE Conference on Computer Vision and Pattern Recognition (CVPR) 2015 (24% accept. rate)

Fast Training of Pose Detectors in the Fourier Domain (PDF) (project)
J. F. Henriques, P. Martins, R. Caseiro, J. Batista
Neural Information Processing Systems (NIPS) 2014 (19% accept. rate)

Likelihood-Enhanced Bayesian Constrained Local Models (PDF) (poster) (videos)
P. Martins, R. Caseiro, J. F. Henriques, J. Batista
IEEE International Conference on Image Processing (ICIP) 2014 (top 10% of accepted papers)

Non-Parametric Bayesian Constrained Local Models (PDF) (poster) (videos)
P. Martins, R. Caseiro, J. Batista
IEEE Conference on Computer Vision and Pattern Recognition (CVPR) 2014 (29% accept. rate)

Rolling Riemannian Manifolds to Solve the Multi-class Classification Problem
R. Caseiro, P. Martins, J. F. Henriques, F. S. Leite, J. Batista
IEEE Conference on Computer Vision and Pattern Recognition (CVPR) 2013 (Oral Presentation, 3% accept. rate)

Let the Shape Speak - Discriminative Face Alignment using Conjugate Priors (PDF) (ext abs) (slides) (videos)
P. Martins, R. Caseiro, J. F. Henriques, J. Batista
British Machine Vision Conference (BMVC) 2012 (Oral Presentation, 8% accept. rate)

Discriminative Bayesian Active Shape Models (PDF) (poster) (spotlight) (videos)
P. Martins, R. Caseiro, J. F. Henriques, J. Batista
European Conference on Computer Vision (ECCV) 2012 (23% accept. rate)

Exploiting the Circulant Structure of Tracking-by-detection with Kernels (PDF) (supplement) (poster) (project) (videos)
J. F. Henriques, R. Caseiro, P. Martins, J. Batista
European Conference on Computer Vision (ECCV) 2012 (23% accept. rate)

Semi-Intrinsic Mean shift on Riemannian Manifolds (PDF) (poster)
R. Caseiro, J. F. Henriques, P. Martins, J. Batista
European Conference on Computer Vision ECCV 2012 (23% accept. rate)

A Nonparametric Riemannian Framework on Tensor Field with Application to Foreground Segmentation (PDF) (poster) (spotlight)
R. Caseiro, J. F. Henriques, P. Martins, J. Batista
IEEE International Conference on Computer Vision (ICCV) 2011 (21% accept. rate)

Face Alignment Through 2.5D Active Appearance Models (PDF) (ext abs) (poster) (videos)
P. Martins, R. Caseiro, J. Batista
British Machine Vision Conference (BMVC) 2010 (33% accept. rate)

Background Modelling on Tensor Field for Foreground Segmentation (PDF) (ext abs) (poster)
R. Caseiro, P. Martins, J. Batista
British Machine Vision Conference (BMVC) 2010 (33% accept. rate)

Towards Generic Fitting Using Multiple Features Discriminative Active Appearance Models (PDF) (poster)
P. Martins, J. Batista
IEEE International Conference on Image Processing (ICIP) 2010

Towards Generic Fitting Using Discriminative Active Appearance Models Embedded on a Riemannian Manifold
P. Martins, J. Batista
International Conference on Computer Vision Theory and Applications (VISAPP) 2010

Identity and Expression Recognition on Low Dimensional Manifolds (PDF) (poster) (videos)
P. Martins, J. Batista
IEEE International Conference on Image Processing (ICIP) 2009

Simultaneous Identity and Expression Recognition Using Face Geometry on Low Dimensional Manifolds (PDF) (poster)
P. Martins, J. Batista
Iberian Conference on Pattern Recognition and Image Analysis (IbPria) 2009

Model-Based Facial Expression Recognition (PDF) (poster)
P. Martins, J. Batista
Portuguese National Conference in Pattern Recognition (RecPad) 2008

Accurate Single View Model-Based Head Pose Estimation (PDF) (poster) (videos)
P. Martins, J. Batista
IEEE International Conference on Automatic Face and Gesture Recognition (FG) 2008

Single View Head Pose Estimation (PDF) (poster)
P. Martins, J. Batista
IEEE International Conference on Image Processing (ICIP) 2008

Monocular Head Pose Estimation (PDF) (slides)
P. Martins, J. Batista
International Conference Image Analysis and Recognition (ICIAR) 2008 (Oral Presentation)

Facial Expression Recognition Using Active Appearance Models (PDF) (slides)
P. Martins, J. Sampaio, J. Batista
International Conference on Computer Vision Theory and Applications (VISAPP) 2008 (Oral Presentation)

Thesis

Parametric Face Alignment: Generative and Discriminative Approaches
PhD Thesis 2012 - Pedro Martins
Faculty of Sciences and Technology, University of Coimbra (UC), Portugal

Active Appearance Models for Facial Expression Recognition and Monocular Head Pose Estimation
MSc. Thesis 2008 - Pedro Martins
Faculty of Sciences and Technology, University of Coimbra (UC), Portugal

Research Projects

	Intelligent and Continuous Online Student Identity Management (TRUSTID) (web)
	Differential Geometry for Computer Vision and Pattern Recognition (DG2CVPR)
	Identity Recognition using 4D Facial Dynamics (web)
	Advanced Interaction Using Facial Information (AI_FI) (web)

Software

TurtleBot3 MatLab/ROS Interface (link)

3D Head Pose Estimation (Python) (link)

Pose estimation utilities (C++, OpenCV) (link)

Institutions

	Institute of Systems and Robotics University of Coimbra
	Advanced Production and Intelligent Systems (ARISE) Associated Laboratory
	Faculty of Sciences and Technology University of Coimbra