Creating and sharing knowledge for telecommunications
... Luís Filipe Barbosa de Almeida Alexandre

Researcher

Luís Alexandre

Academic position: Associate Professor
Joining date: 27-12-2012
Roles in IT: Researcher
Scientific Area: Networks and Multimedia
Group: Pattern and Image Analysis – Cv

Email: Send Email
Address: IT Branch – Covilhã
Faculdade de Engenharia
Covilhã
6201-001
Tel: 275329953
Fax: 275329972

Personal page


Scientific Achievements

  • Agregação, Universidade da Beira Interior, 01-01-2013
  • PhD, Faculdade de Engenharia da Universidade do Porto, 15-07-2002
  • MSc, Faculdade de Engenharia da Universidade do Porto, 18-12-1997
  • Licenciatura, Faculdade de Ciências da Universidade do Porto, 15-07-1994
  • Estruturas de Dados, , Lic. Engenharia Informática
  • Programação e Algoritmos, , Lic. Engenharia Informática
Supervision of theses
Co-Supervision of theses
  • J. Sá, L. Silva, J. Santos, L.A. Alexandre, Minimum Error Entropy Classification, Springer, Berlim, 2012,
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  • J. Sá, L.A. Alexandre, W.D. Duch, D.M. Mandic, Artificial Neural Networks -- ICANN 2007, Proceedings, Part I, Springer, Berlin, 2007,
    | BibTex
  • J. Sá, L.A. Alexandre, W.D. Duch, D.M. Mandic, Artificial Neural Networks -- ICANN 2007, Proceedings, Part II, Springer, Berlin, 2007,
    | BibTex
  • JM Marques, G. Falcão, L.A. Alexandre, Distributed Learning of CNNs on Heterogeneous CPU/GPU Architectures, Applied Artificial Intelligence, Vol. 1, No. 1, pp. 1 - 23, September, 2018,
    | Abstract
    | BibTex
  • ACP Perre, L.A. Alexandre, LCF Freire, Lesion classification in mammograms using convolutional neural networks and transfer learning, Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization, Vol. 0, No. 0, pp. 1 - 7, July, 2018 | BibTex
  • JBM Maria, J. Amaro, G. Falcão, L.A. Alexandre, Stacked Autoencoders using Low-power Accelerated Architectures for Object Recognition in Autonomous Systems, Neural Processing Letters, Vol. 43, No. 2, pp. 445 - 458, April, 2016 | BibTex
  • CK Kandaswamy, L. Silva, L.A. Alexandre, J. Santos, High-Content Analysis of Breast Cancer Using Single-Cell Deep Transfer Learning, Journal of Biomolecular Screening, Vol. 0, No. 0, pp. 1 - 8, January, 2016 | BibTex
  • L.I. Itti, L.A. Alexandre, BIK-BUS: Biologically Motivated 3D Keypoint Based on Bottom-Up Saliency, IEEE Trans. on Image Processing, Vol. 24, No. 1, pp. 163 - 175, January, 2015 | BibTex
  • L.A. Alexandre, Algorithms for Invariant Long-Wave Infrared Face Segmentation: Evaluation and Comparison, Pattern Analysis and Applications, Vol. 1, No. 1, pp. 1 - 15, December, 2013 | BibTex
  • H. Proença, L.A. Alexandre, Introduction to the special issue on the Recognition of visible wavelength iris images captured at-a-distance and on-the-move, Pattern Recognition Letters, Vol. 28, No. 2, pp. 963 - 964, June, 2012 | BibTex
  • H. Proença, L.A. Alexandre, Toward Covert Iris Biometric Recognition: Experimental Results From the NICE Contests, IEEE Trans. on Information Forensics and Security, Vol. 7, No. 2, pp. 798 - 808, April, 2012 | BibTex
  • L. Silva, J. Sá, L.A. Alexandre, The MEE Principle in Data Classification: A Perceptron-Based Analysis, Neural Computation, Vol. 22, No. 10, pp. 2698 - 2728, October, 2010,
    | Abstract
    | BibTex
  • L.A. Alexandre, Gender recognition: A multiscale decision fusion approach, Pattern Recognition Letters, Vol. 31, No. 11, pp. 1422 - 1427, August, 2010,
    | Abstract
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  • H. Proença, L.A. Alexandre, Introduction to the Special Issue on the Segmentation of Visible Wavelength Iris Images Captured At-a-distance and On-the-move, Image and Vision Computing, Vol. 28, No. 2, pp. 213 - 214, February, 2010,
    | Abstract
    | BibTex
  • H. Proença, L.A. Alexandre, Iris Recognition: Analysis of the Error Rates Regarding the Accuracy of the Segmentation Stage, Image and Vision Computing, Vol. 1, No. 1, pp. 1 - 1, January, 2009,
    | Abstract
    | BibTex
  • H. Proença, L.A. Alexandre, S. Filipe, The UBIRIS.v2: A Database of Visible Wavelength Iris Images Captured On-The-Move and At-A-Distance, IEEE Trans. on Pattern Analysis and Machine Intelligence, Vol. 1, No. 1, pp. 1 - 1, January, 2009,
    | Abstract
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  • L. Silva, J. Sá, L.A. Alexandre, Data Classification with Multilayer Perceptrons using a Generalized Error Function, Neural Networks, Vol. 21, No. 9, pp. 1302 - 1310, November, 2008 | BibTex
  • J. Santos, J. Sá, L.A. Alexandre, LEGClust - A Clustering Algorithm Based on Layered Entropic Subgraphs, IEEE Trans. on Pattern Analysis and Machine Intelligence, Vol. 30, No. 1, pp. 62 - 75, January, 2008 | BibTex
  • H. Proença, L.A. Alexandre, Towards Non-Cooperative Iris Recognition: A Classification Approach Using Multiple Signatures, IEEE Trans. on Pattern Analysis and Machine Intelligence, Vol. 3, No. 1, pp. 1 - 12, July, 2007 | BibTex
  • L. Silva, C. Felgueiras, L.A. Alexandre, J. Sá, Error Entropy in Classification Problems: A Univariate Data Analysis, Neural Computation, Vol. -, No. 18, pp. 2036 - 2061, September, 2006 | BibTex
  • H. Proença, L.A. Alexandre, Iris Segmentation Methodology for Non-Cooperative Recognition, IEE Proceedings Part-I: Vision, Image and Signal Processing, Vol. 153, No. 2, pp. 199 - 205, April, 2006 | BibTex
  • B. Carneiro, L.A. Alexandre, Towards AGV Optimization using ROS and Stage Simulator, Conference on Telecommunications - ConfTele, Lisbon, Portugal, Vol., pp. -, June, 2019 | BibTex
  • G. Falcão, L.A. Alexandre, JM Marques, X.F. Frazão, JBM Maria, On the evaluation of energy-efficient deep learning using stacked autoencoders on mobile GPUs, Euromicro International Conf. on Parallel, Distributed and network-based Processing - PDP, St. Petersburg, Russia, Vol., pp. -, March, 2017 | BibTex
  • MIFF Fernandes, L.A. Alexandre, Dynamic Recognition of Obstacles for Optimal Robot Navigation, Portuguese Conf. on Pattern Recognition - RecPad, Aveiro, Portugal, Vol. 1, pp. 1 - 2, October, 2016 | BibTex
  • MIFF Fernandes, L.A. Alexandre, SLAMfusion: Fusing SLAM Methods for Improved Robustness, IEEE International Conf. on Autonomous Robot Systems and Competitions (ICARSC) - ICARSC, Bragança, Portugal, Vol. 1, pp. 1 - 5, May, 2016 | BibTex
  • X.F. Frazão, L.A. Alexandre, Weighted Convolutional Neural Network Ensemble, Iberoamerican Congress on Pattern Recognition - CIARP, Puerto Vallarta, Mexico, Vol. LNCS 8827, pp. 674 - 681, November, 2014 | BibTex
  • X.F. Frazão, L.A. Alexandre, DropAll: Generalization of Two Convolutional Neural Network Regularization Methods, International Conf. on Image Analysis and Recognition, Vilamoura, Portugal, Vol. LNCS 8814, pp. 282 - 289, October, 2014 | BibTex
  • L.A. Alexandre, A Comparative Evaluation of 3D Keypoint Detectors in a RGB-D Object Dataset, International Conf. on Computer Vision Theory and Applications - VISAPP, Lisbon, Portugal, Vol. 1, pp. 1 - 8, January, 2014 | BibTex
  • L.A. Alexandre, Set Distance Functions for 3D Object Recognition, Iberoamerican Congress on Pattern Recognition - CIARP, Havana, Cuba, Vol. LNCS 8258, pp. 57 - 64, November, 2013 | BibTex
  • DM Wegrzyn, L.A. Alexandre, A Genetic Algorithm-Evolved 3D Point Cloud Descriptor, Iberoamerican Congress on Pattern Recognition - CIARP, Havana, Cuba, Vol. LNCS 8258, pp. 20 - 23, November, 2013 | BibTex
  • L.A. Alexandre, Thermal Infrared Face Segmentation: A New Pose Invariant Method, Iberian Conf. on Pattern Recognition and Image Analysis, Funchal, Portugal, Vol. LNCS7887, pp. 632 - 639, June, 2013 | BibTex
  • L.A. Alexandre, A Comparative Evaluation of 3D Keypoint Detectors, Conf. on Telecommunications - ConfTele, Castelo Branco, Portugal, Vol. 1, pp. 145 - 148, May, 2013 | BibTex
  • L.A. Alexandre, 3D Descriptors for Object and Category Recognition: a Comparative Evaluation, IEEE International Conf. on Intelligent Robotic Systems - IROS, Vilamoura, Portugal, Vol. Workshop on Color-Depth Camera Fusion in Robotics, pp. 1 - 6, October, 2012 | BibTex
  • L.A. Alexandre, Single layer complex valued neural network with entropic cost function, International Conf. on Artificial Neural Networks - ICANN, Espoo, Finland, Vol. Springer LNCS 6791, pp. 331 - 338, June, 2011 | BibTex
  • C. N. Padole, L.A. Alexandre, Motion based Particle Filter for Human Tracking with Thermal Imaging, International Conf. on Emerging Trends in Engineering and Technology - ICETET, Goa, India, Vol. Nov, pp. 1 - 6, November, 2010 | BibTex
  • S. Filipe, L.A. Alexandre, Improving Face Segmentation in Thermograms using Image Signatures, Iberoamerican Congress on Pattern Recognition - CIARP, São Paulo, Brazil, Vol. 6419, pp. 402 - 409, November, 2010,
    | Abstract
    | BibTex
  • C. N. Padole, L.A. Alexandre, Wigner Distribution based Human Motion Tracking using Thermal Images, IEEE Conf. on Computer Vision and Pattern Recognition - CVPR, San Francisco, United States, Vol. June, pp. 1 - 8, June, 2010 | BibTex
  • R.S. Santos, L.A. Alexandre, Improving Spectroface using Pre-processing and Voting, IEEE International Conf. on Intelligent Computing and Intelligent Systems - ICIS, Shanghai, China, Vol. 4, pp. 552 - 556, November, 2009 | BibTex
  • L.A. Alexandre, M.J.E. Embrechts, Reservoir size, spectral radius and connectivity in static classification problems, International Conf. on Artificial Neural Networks - ICANN, Limasol, Cyprus, Vol. LNCS 5768, pp. 1015 - 1024, September, 2009 | BibTex
  • J. Sá, J.G. Gama, R.S. Sebastião, L.A. Alexandre, Decision Trees Using the Minimum Entropy-of-Error Principle, International Conf. on Computer Analysis of Images and Patterns - CAIP, Munster, Germany, Vol. LNCS 5702, pp. 799 - 807, September, 2009 | BibTex
  • L.A. Alexandre, M.J.E. Embrechts, J.L. Linton, Benchmarking Reservoir Computing on Time-Independent Classification Tasks, IEEE International Joint Conf. on Artificial Neural Networks - IJCNN, Atlanta, United States, Vol. 1, pp. 89 - 93, June, 2009 | BibTex
  • M.J.E. Embrechts, L.A. Alexandre, J.L. Linton, Reservoir computing for static pattern recognition, European Symp. on Artificial Neural Networks - ESANN, Bruges, Belgium, Vol. 1, pp. 245 - 250, April, 2009 | BibTex
  • L.A. Alexandre, Maximizing the Zero-Error Density for RTRL, IEEE International Symp. on Signal Processing and Information Technology - ISSPIT, Sarajevo, Bosnia and Herzegovina, Vol. 1, pp. 1 - 1, December, 2008 | BibTex
  • L.A. Alexandre, N.N. Nobre, J.C. Casteleiro, Color and Position versus Texture Features for Endoscopic Polyp Detection, International Conf. on BioMedical Engineering and Informatics - BMEI, Sanya, China, Vol. 1, pp. 38 - 42, May, 2008 | BibTex
  • L Baptista, L.A. Alexandre, Text Pre-processing for Lossless Compression, IEEE Data Compression Conference - DCC, Snowbird, United States, Vol. 1, pp. 506 - 506, March, 2008 | BibTex
  • H. Proença, L.A. Alexandre, Iris Recognition: A Method to Increase the Robustness to Noisy Imaging Environments Through the Selection of the Higher Discriminating Features, IEEE International Conf. on Computational Intelligence and Multimedia Applications, Sivakasi, India, Vol. 3, pp. 301 - 307, December, 2007 | BibTex
  • H. Proença, L.A. Alexandre, Iris Recognition: An Entropy-Based Coding Strategy Robust to Noisy Imaging Environments, International Symp. on Visual Computing - IVC, Lake Tahoe, United States, Vol. 1, pp. 621 - 632, November, 2007 | BibTex
  • L.A. Alexandre, J.C. Casteleiro, N.N. Nobre, Polyp Detection in Endoscopic Video using SVMs, European Conf. on Principles and Practice of Knowledge Discovery in Databases - PKDD, Warsaw, Poland, Vol. LNAI 4702, pp. 358 - 365, September, 2007 | BibTex
  • H. Proença, L.A. Alexandre, The NICE.I: Noisy Iris Challenge Evaluation – Part I, IEEE International Conf. on Biometrics: Theory, Applications and Systems - BTAS, Washington, United States, Vol. 1, pp. 0 - 0, September, 2007 | BibTex
  • H. Proença, L.A. Alexandre, Iris Recognition: An Analysis of the Aliasing Problem in the Iris Normalization Stage, International Conf. on Computational Intelligence and Security - CIS, Guangzhou, China, Vol. 2, pp. 1771 - 1774, November, 2006 | BibTex
  • J. Santos, L.A. Alexandre, J. Sá, Modular Neural Network Task Decomposition Via Entropic Clustering, International Conf. on Intelligent Systems Design and Applications - ISDA, Jinan, China, Vol. 1, pp. 62 - 67, October, 2006 | BibTex
  • L. Silva, L.A. Alexandre, J. Sá, New developments of the Z-EDM algorithm, International Conf. on Intelligent Systems Design and Applications - ISDA, Jinan, China, Vol. 1, pp. 1067 - 1072, October, 2006 | BibTex
  • H. Proença, L.A. Alexandre, Iris Recognition: Measuring Feature´s Quality for the Feature Selection in Unconstrainded Image Capture Environments, International Conf. on Computational Intelligence for Homeland Security and Personal Safety - CIHSPS, Alexandria, United States, Vol. 1, pp. 35 - 40, October, 2006 | BibTex
  • L.A. Alexandre, J. Sá, Error Entropy Minimization for LSTM training, International Conf. on Artificial Neural Networks - ICANN, Athens, Greece, Vol. LNCS 4131, pp. 244 - 253, September, 2006 | BibTex
  • L.A. Alexandre, A. Mendonça, A. Campilho, A multiclassifier approach for lung nodule classification, International Conf. on Image Analysis and Recognition, Póvoa de Varzim, Portugal, Vol. LNCS 4142, pp. 612 - 623, September, 2006 | BibTex
  • H. Proença, L.A. Alexandre, A Method for the Identification of Noisy Regions in Normalized Iris Images, International Conf. on Pattern Recognition - ICPR, Hong Kong, China, Vol. 4, pp. 405 - 408, August, 2006 | BibTex
  • H. Proença, L.A. Alexandre, A Method for the Identification of Inaccuracies in the Pupil Segmentation, International Conf. on Availability, Reliability and Security - ARES, Wien, Austria, Vol. 1, pp. 227 - 230, April, 2006 | BibTex
  • J. Santos, J. Sá, L.A. Alexandre, Batch-Sequential Algorithm for Neural Networks Trained with Entropic Criteria, International Conf. on Artificial Neural Networks - ICANN, Warsaw, Poland, Vol. LNCS 3697, pp. 91 - 96, September, 2005 | BibTex
  • H. Proença, L.A. Alexandre, UBIRIS: a noisy iris image database, International Conf. on Image Analysis and Processing - ICIAP, Cagliari, Italy, Vol. 1, pp. 920 - 977, September, 2005 | BibTex
  • L. Silva, L.A. Alexandre, J. Sá, Neural Network Classification: Maximizing Zero-Error Density, International Conf. on Advances in Pattern Recognition - ICAPR, Bath, United Kingdom, Vol. LNCS3686, pp. 127 - 135, August, 2005 | BibTex
  • J. Santos, J. Sá, L.A. Alexandre, Neural Networks Trained with the EEM Algorithm: Tuning the Smoothing Parameter, WSEAS International Conf. on Neural Networks, Lisboa, Portugal, Vol. 4, pp. 295 - 300, June, 2005 | BibTex
  • L. Silva, J. Sá, L.A. Alexandre, Neural Network Classification using Shannon's Entropy, European Symp. on Artificial Neural Networks - ESANN, Bruges, Belgium, Vol. 1, pp. 217 - 222, April, 2005 | BibTex
  • J. Santos, L.A. Alexandre, J. Sá, The Error Entropy Minimization Algorithm for Neural Network Classification, International Conf. on Recent Advances in Soft Computing, Nottingham, United Kingdom, Vol. 1, pp. 92 - 97, December, 2004 | BibTex
  • J. Santos, L.A. Alexandre, J. Sá, Optimization of the error entropy minimization algorithm for neural network classification, Intelligent Engineering Systems Through Artificial Neural-ANNIE, St. Louis, United States, Vol. 14, pp. 81 - 86, November, 2004 | BibTex
  • J. Santos, L.A. Alexandre, J. Sá, Neural Network Classification using Error Entropy Minimization, Italian Workshop on Neural Network-WIRN, Perugia, Italy, Vol. CDROM, pp. CDROM - CDROM, September, 2004 | BibTex
  • L.A. Alexandre, A. Campilho, M. Kamel, Bounds for the Average Generalization Error of the Mixture of Experts Neural Network, International Workshop on Statistical and Syntactical Pattern Recognition, Lisboa, Portugal, Vol. 1, pp. 618 - 625, August, 2004 | BibTex
  • L.A. Alexandre, M. Sousa, S. Madeira, J. Cordeiro, G. Dias, Web Image Indexing: Combining Image Analysis with Text Processing, Workshop on Image Analysis for Multimedia Interactive Services WIAMIS, Lisboa, Portugal, Vol. CD, pp. 0 - 0, April, 2004 | BibTex
  • J. Sá, F. Sereno, L.A. Alexandre, Neural Network Learning: Testing Bounds on Sample Complexity, International Workshop on Pattern Recognition in Information Systems, Porto, Portugal, Vol. 1, pp. 196 - 201, April, 2004 | BibTex
  • L.A. Alexandre, A. Campilho, M. Kamel, A Probabilistic Model for the Cooperative Modular Neural Network, Iberian Conf. on Pattern Recognition and Image Analysis, Maiorca, Spain, Vol. LNCS vol. 2652, pp. 11 - 18, June, 2003 | BibTex

Currently running projects1

Acronym Name Funding Agency Start date Ending date
HAnDLE Hardware Accelerated Deep Learning Framework FCT 12-07-2018 11-07-2021

Closed Projects1

Acronym Name Funding Agency Start date Ending date
NECOVID NECOVID: Negative Covert Biometric Identification FCT/PTDC 01-11-2009 01-11-2012
  • L.A. Alexandre, "Top Reviewer", Luís Alexandre was considered "Top Reviewer" by the Elsevier journal "Pattern Recognition Letters"., 01-10-2013