Roberto Javier López-Sastre

Associate Professor, University of Alcalá 

Office S-342, Polytechnic School
University of Alcalá
Campus Universitario, A2 Km 33.600
28805, Alcalá de Henares (SPAIN)
Email: robertoj.lopez@uah.es
Tlf: (+34) 91 885 6720
Fax: (+34) 91 885 6699

Teaching 2024-2025:

ABOUT ME

I received a Master of Electrical Engineering from the University of Alcalá, Spain in 2005. I work at GRAM research group within the Department of Signal Theory and Communications, where I defended my PhD in Electrical Engineering on may 18, 2010, entitled "Visual Vocabularies for Category-Level Object Recognition". In 2008, I spent 6 months in lovely Leuven, working with Tinne Tuytelaars and the VISICS-PSI research group. Summer 2010, I visited Silvio Savarese's group at University of Michigan.

Research interests

In reverse chronological order: offline-RL, meta-learning, semantic visual navigation, AI applied to astrophysics, unsupervised learning, activity recognition, object category pose estimation, semantic visual vocabularies, category-level object recognition, traffic signs recognition/detection.

Group

PhD Students:

Postdocs: Visitors:
  • Sergio Hernández-García (2022, PhD student from King Juan Carlos University)
  • Nadjia Khatir (2017, PhD student from University of Oran)
Master's and Undergraduate Students:
  • Rafael Flor-Rodríguez (Master student)
  • Walfrido González Molina (Lab Technician & Undergraduate student)
Alumni:

Community duties & Awards

Program committee member / reviewer for the following conferences: Awards:
Reviewer for journals: IEEE TPAMI, CVIU, IEEE TIP, Robotics and Autonomous Systems , IEEE Transactions on Cybernetics, IEEE SPL, PRL, IEEE TCSVT, PR, JRTIP, and IEEE ITS.

Selected Publications

Preprints


Live Video Captioning

E. Blanco-Fernández, C. Gutiérrez-Álvarez, N. Nasri, S. Maldonado-Bascón, R. J. López-Sastre.

ArXiv, 2024. PDF


Realistic Continual Learning Approach using Pre-trained Models

N. Nasri, C. Gutiérrez-Álvarez, S. Lafuente-Arroyo, S. Maldonado-Bascón, R. J. López-Sastre.

ArXiv, 2024. PDF


Visual Semantic Navigation with Real Robots

C. Gutiérrez-Álvarez, P. Ríos-Navarro, R. Flor-Rodríguez, F. J. Acevedo-Rodríguez, R. J. López-Sastre.

ArXiv, 2023. PDF Code


2023


Towards Clear Evaluation of Robotic Visual Semantic Navigation

C. Gutiérrez-Álvarez, S. Hernandez-García, N. Nasri, A. Cuesta-Infante, R. J. López-Sastre.

ICARA, 2023. PDF Code


2022


Assistive Robot with an AI-Based Application for the Reinforcement of Activities of Daily Living: Technical Validation with Users Affected by Neurodevelopmental Disorders

N. Nasri, R. J. López-Sastre, S. Pacheco-da-Costa, I. Fernández-Munilla, C. Gutiérrez-Álvarez, T. Pousada-Garcı́a, F. J. Acevedo-Rodríguez, S. Maldonado-Bascón,.

Applied Sciences, 2022. PDF


Stellar mass and radius estimation using artificial intelligence

A. Moya and R. J. López-Sastre.

Astronomy & Astrophysics, 2022. PDF Code


2021


Live Video Action Recognition from Unsupervised Action Proposals

R. J. López-Sastre, M. Baptista-Ríos, F. J. Acevedo-Rodríguez, P. Martín-Martín, S. Maldonado-Bascón.

17th International Conference on Machine Vision Applications (MVA), 2021. PDF


AI for dating stars: a benchmarking study for gyrochronology

A. Moya, J. Recio-Martínez and R. J. López-Sastre.

1st Workshop on AI for Space, CVPR, 2021. PDF Supplementary Code


2020


Rethinking Online Action Detection in Untrimmed Videos: A Novel Online Evaluation Protocol

M. Baptista-Ríos, R. J. López-Sastre, F. Caba Heilbron, Jan van Gemert, F. J. Acevedo-Rodríguez, S. Maldonado-Bascón.

IEEE Access, 2020. PDF Code


Unsupervised Action Proposals Using Support Vector Classifiers for Online Video Processing

M. Baptista-Ríos, R. J. López-Sastre, F. J. Acevedo-Rodríguez, P. Martín-Martín, S. Maldonado-Bascón.

Sensors, 2020. PDF Code


Learning to Learn Face-PAD: a lifelong learning approach

D. Pérez-Cabo, D. Jiménez-Cabello, A. Costa-Pazo, R. J. López-Sastre..

IJCB, 2020. PDF Code


2019


Deep Anomaly Detection for Generalized Face Anti-Spoofing

D. Pérez-Cabo, D. Jiménez-Cabello, A. Costa-Pazo, R. J. López-Sastre.

Chalearn Looking at People series Face Spoofing Attack Workshop and Challenge, CVPR 2019. PDF


Generalized Presentation Attack Detection: a face anti-spoofing evaluation proposal

A. Costa-Pazo, D. Jiménez-Cabello, E. Vázquez-Fernández, J. L. Alba-Castro, R. J. López-Sastre.

International Conference on Biometrics (ICB) 2019. PDF Code


Combining Online Clustering and Rank Pooling Dynamics for Action Proposals

Nadjia Khatir, Roberto J. López-Sastre, Marcos Baptista-Ríos, Safia Nait-Bahloul, Francisco Javier Acevedo-Rodríguez.

IBPRIA 2019 PDF


Collision anticipation via deep reinforcement learning for visual navigation

E. Gutiérrez-Maestro, R. J. López-Sastre, S. Maldonado-Bascón.

IBPRIA 2019 PDF


Learning to Exploit the Prior Network Knowledge for Weakly-Supervised Semantic Segmentation

C. Redondo-Cabrera, M. Baptista-Ríos, R. J. López-Sastre.

IEEE Transactions on Image Processing 2019 PDF Code


Answering Visual-Relational Queries in Web-Extracted Knowledge Graphs

D. Oñoro-Rubio, M. Niepert, A. García-Durán, R. González, R. J. López-Sastre.

AKBC 2019 PDF Code


Unsupervised learning from videos using temporal coherency deep networks

C. Redondo-Cabrera and R. J. López-Sastre.

Computer Vision and Image Understanding 2019. PDF Code


2018


The challenge of simultaneous object detection and pose estimation: a comparative study

D. Oñoro-Rubio, R. J. López-Sastre, C. Redondo-Cabrera, P. Gil-Jiménez.

Image and Vision Computing 2018. PDF Code


In pixels we trust: From Pixel Labeling to Object Localization and Scene Categorization

C. Herránz-Perdigureo, C. Redondo-Cabrera and R. J. López-Sastre.

IROS, 2018. PDF Code Video


Learning Short-Cut Connections for Object Counting

D. Oñoro-Rubio, M. Niepert, R. J. López-Sastre.

BMVC, 2018 PDF


ISA^2: Intelligent Speed Adaptation from Appearance

C. Herránz-Perdigureo and R. J. López-Sastre.

IROS 2018 Workshop, 10th Planning, Perception and Navigation for Intelligent Vehicles (PPNIV'18). PDF ISA^2 Dataset


2016


Pose Estimation Errors, the Ultimate Diagnosis

C. Redondo-Cabrera, R. J. López-Sastre, Y. Xiang , T. Tuytelaars, S. Savarese.

ECCV, 2016. PDF Code Supplementary


Towards perspective-free object counting with deep learning

D. Oñoro-Rubio and R. J. López-Sastre.

ECCV, 2016. PDF Code Video


Unsupervised Robust Feature-based Partition Ensembling to Discover Categories

R. J. López-Sastre.

CVPR Workshops, Robust Features for Computer Vision, 2016. PDF Code Video


2015


Because better detections are still possible: Multi-aspect Object Detection with Boosted Hough Forest

C. Redondo-Cabrera, R. J. López-Sastre.

BMVC 2015. PDF Supplementary Code


Extremely Overlapping Vehicle Counting

R. Guerrero-Gómez-Olmedo, B. Torre-Jimenez, R. J. López-Sastre, S. Maldonado-Bascón and Daniel Oñoro-Rubio.

IbPRIA 2015. PDF TRANCOS Dataset


Fast Head Pose Estimation for Human-Computer Interaction

M. García-Montero, C. Redondo-Cabrera, R. López-Sastre and Tinne Tuytelaars.

IbPRIA 2015. PDF Code Video


Structured Output Prediction with Hierarchical Loss Functions for Seafloor Imagery Taxonomic Categorization.

N. Nourani-Vatani, R. López-Sastre and S. Williams.

IbPRIA 2015. PDF Code Video


2014


Recognizing in the Depth: Selective 3D Spatial Pyramid Matching Kernel for Object and Scene Categorization

C. Redondo-Cabrera, R. J. López-Sastre, J. Acevedo-Rodríguez, S. Maldonado-Bascon.

Image and Vision Computing 2014. PDF Project page


All together now: Simultaneous Object Detection and Continuous Pose Estimation using a Hough Forest with Probabilistic Locally Enhanced Voting

C. Redondo-Cabrera, R. J. López-Sastre, T. Tuytelaars.

BMVC 2014. PDF Project page


2013


Evaluating 3D spatial pyramids for classifying 3D shapes

R. J. López-Sastre, A. García-Fuertes, C. Redondo-Cabrera, F. J. Acevedo-Rodríguez, S. Maldonado-Bascón.

Computers & Graphics 2013. PDF Project page - Executable Paper


Vehicle Tracking by Simultaneous Detection and Viewpoint Estimation

R. Guerrero-Gómez-Olmedo, R. J. López-Sastre, S. Maldonado-Bascón, A. Fernández-Caballero.

IWINAC 2013. PDF GRAM RTM Dataset


Heterogeneous Visual Codebook Integration via Consensus Clustering for Visual Categorization

R. J. López-Sastre, J. Renes-Olalla, P. Gil-Jiménez, S. Maldonado-Bascón, S. Lafuente-Arroyo.

IEEE TCSVT 2013. PDF Project page


2012


SURFing the Point Clouds: Selective 3D Spatial Pyramids for Category-level Object Recognition

C. Redondo-Cabrera, R. J. López-Sastre, F.J. Acevedo-Rodríguez, S. Maldonado-Bascón.

IEEE CVPR 2012. PDF Project page


2011


Deformable Part Models Revisited: A Performance Evaluation for Object Category Pose Estimation

R. J. López-Sastre, T. Tuytelaars, S. Savarese.

IEEE ICCV 2011, 1st IEEE Workshop on Challenges and Opportunities in Robot Perception. PDF Project page


Fast Reciprocal Nearest Neighbors Clustering

R. J. López-Sastre, D. Oñoro-RUbio, P. Gil-Jiménez, S. Maldonado-Bascón.

Signal Processing. PDF Code


Towards a more discriminative and semantic visual vocabulary

R. J. López-Sastre, T. Tuytelaars, J. Acevedo-Rodríguez, S. Maldonado-Bascón.

Computer Vision and Image Understanding. PDF Code


Visual Word Aggregation

R. J. López-Sastre, J. Renes-Olalla, P. Gil-Jiménez, S. Maldonado-Bascón.

ibPRIA2011. PDF


2010


Visual Vocabularies for Category-Level Object Recognition

R. J. López-Sastre

Ph.D. Thesis. PDF


2009


Class Representative Visual Words for Category-level Object Recognition

R. J. López-Sastre, T. Tuytelaars and S. Maldonado-Bascón.

ibPRIA2009. PDF


2008


Fundaments in luminance and retroreflectivity measurements of vertical traffic signs using a color digital camera

P. Siegmann, R. J. López-Sastre, P. Gil-Jiménez, S. Lafuente-Arroyo, S. Maldonado-Bascón.

IEEE Transactions on Instrumentation and Measurement. PDF


2007


Computer Algebra Algorithms Applied to Computer Vision in a Parking Management System

R. J. López-Sastre, P. Gil-Jiménez, F.J. Acevedo, S. Maldonado.

IEEE ISIE 2007. PDF


Road-sign Detection and recognition based on support vector machines

S. Maldonado-Bascón, S. Lafuente-Arroyo, P. Gil-Jiménez, H. Gómez-Moreno and F. López-Ferreras.

IEEE trans. on Intelligent transportation systems. PDF


2006


An Approach to the Recognition of Information Traffic Sign Based on 2-D Homography and SVMs

A. Vázquez-Reina, R. J. López-Sastre, P. Siegmann, S. Lafuente-Arroyo and H. Gómez-Moreno.

Proceedings of Advanced Concepts for Intelligent Vision Systems 2006. PDF


Adaptive Traffic Road Sign Panels Text Extraction

A. Vázquez-Reina, R. J. López-Sastre, S. Lafuente-Arroyo and P. Gil-Jiménez.

ISPRA 2006. PDF


2005


Recognition of Mandatory Traffic Signs using the Hausdorff Distance

R. J. López-Sastre, S. Lafuente-Arroyo, P. Siegmann, P. Gil-Jiménez, A. Vázquez-Reina.

ISCGAV 2005. PDF


Teaching

Asignaturas/Courses


23/24

22/23

21/22

20/21

19/20

18/19

17/18

16/17

15/16

14/15

13/14

12/13

11/12

10/11

09/10

08/09

07/08

06/07