Lucas Arrabal Thomaz

Lucas Thomaz

Academic position:	Researcher
Joining date:	15-03-2019
Roles in IT:	Researcher
Thematic Line:	Information and Data Sciences
Group:	Multimedia Signal Processing – Lr

Email: Send Email
Address: IT Branch – Leiria
Morro do Lena - Alto do Vieiro
Leiria
2411 - 901
Tel: 244820340

https://www.orcid.org/0000-0002-1004-7772

By Authors
By Institutions

SCHOLAR LinkedIn

30-01-2025

Daniel Nicolau and Nicolas Vasconcellos were awarded two IEEE SPS merit grants

Daniel Nicolau and Nicolas Vasconcellos, master’s students in Electronic Engineering at the Polytechnic Institute of Leiria, and our researchers, were awarded two merit grants from the IEEE Signal Processing Society.

Scientific Achievements

Degrees

PhD, Universidade Federal do Rio de Janeiro, 10-12-2018
MSc, Universidade Federal do Rio de Janeiro, 03-03-2015
Undergraduate, Universidade Federal do Rio de Janeiro, 13-05-2013

Affiliations

Instituto Politécnico de Leiria, 27-02-2022, Temporary
Instituto Politécnico de Leiria, 07-11-2019 - 26-02-2022, Temporary
Instituto de Telecomunicações, 14-03-2019 - 31-12-2021, -
North Carolina State University, 29-02-2016 - 27-02-2017, -
Universidade Federal do Rio de Janeiro, 28-02-2015 - 11-12-2018, -
Universidade Federal do Rio de Janeiro, 28-02-2013 - 03-03-2015, -

Leadership Positions

9Leadership Positions

Expertise Topics

Image and video compression and analysis
Image and signal processing
3D and light field image and video coding
Medical image compression
Image and Video Sparse Representations

Academic Activities

8Lecture courses

Sistemas Eletrónicos Embebidos para o Automóvel, Instituto Politécnico de Leiria, Mestrado em Engenharia Automóvel
Física Aplicada, Instituto Politécnico de Leiria, Licenciatura em Engenharia Informática
Microprocessadores, Instituto Politécnico de Leiria, Licenciatura em Engenharia Eletrotecnica e de Computadores
Microprocessadores, Instituto Politécnico de Leiria, Licenciatura em Engenharia Automóvel
Análise e Processamento de Sinais, Instituto Politécnico de Leiria, Licenciatura em Engenharia Eletrotécnica e de Computadores
Instrumentação e Processamento de Sinais, Instituto Politécnico de Leiria, Mestrado em Engenharia Automóvel
Codificação de Áudio e Vídeo, Instituto Politécnico de Leiria, Mestrado em Engenharia Eletrotécnica
Eletrotecnia e Circuitos Elétricos, Instituto Politécnico de Leiria, TeSP em Automação, Robótica e Manutenção Industrial

4Supervision of PhD theses

Publications

1Books Chapters

F. Cunha, S.M.M. Faria, L. A. Thomaz, O. Parracho, P.A. Assunção, Data Compression Algorithms For Biomedical Images, Chapter in, Imaging Modalities for Biological and Preclinical Research: A Compendium, Volume 2, IOP Publishing, Bristol, United Kingdom, 2021 | Full text (PDF 74 KBs)

20Papers in Journals

N. V. Vasconcellos, L.M. Távora, R.M. Miragaia, C. Grilo, L. A. Thomaz, Explainable prototype-based image classification using adaptive feature extractors in medical images, Computers in Biology and Medicine, Vol. 199, No., pp. 111322 - 111322, December, 2025 | BibTex
D. N. Nicolau, L. A. Thomaz, L.M. Távora, S.M.M. Faria, Enhancing Learning-Based Cross-Modality Prediction for Lossless Medical Imaging Compression, IEEE Open Journal of Signal Processing, Vol. 6, No., pp. 489 - 497, 2025,
| Abstract | BibTex
L. Tavares, A. F. Silva, R. Padilla, L. A. Thomaz, S. L. Netto, E. Silva, Pixel-Based Change Detection in Moving-Camera Videos Using Twin Convolutional Features on a Data-Constrained Scenario, IEEE Access, Vol. 13, No., pp. 123613 - 123629, 2025 | BibTex
G. A. R. AlRegib, M. Prabhushankar, K. Kokilepersaud, P. Chowdhury, Z. Fowler, S. T. Corona, L. A. Thomaz, A. Majumdar, Ophthalmic Biomarker Detection: Highlights From the IEEE Video and Image Processing Cup 2023 Student Competition [SP Competitions], IEEE Signal Processing Magazine, Vol. 41, No. 4, pp. 96 - 104, July, 2024 | BibTex
D. Cozzolino, K. Nagano, L. A. Thomaz, A. Majumdar, L. Verdoliva, Synthetic Image Detection: Highlights from the IEEE Video and Image Processing Cup 2022 Student Competition [SP Competitions], IEEE Signal Processing Magazine, Vol. 40, No. 7, pp. 94 - 100, November, 2023 | BibTex
F. Cunha, V. B. Blüml, L. M. Z Zopf, A. W. Walter, M. W. Wagner, W. J. W. Weninger, L. A. Thomaz, L.M. Távora, L. A. S. C. Cruz, S.M.M. Faria, Lossy Image Compression in a Preclinical Multimodal Imaging Study, Journal of Digital Imaging, Vol. 36, No. 4, pp. 1826 - 1850, April, 2023,
| Abstract | BibTex
Pedro M. M. Pereira, L. A. Thomaz, L.M. Távora, P.A. Assunção, R. Pinto, R. Paiva, S.M.M. Faria, Multiple Instance Learning Using 3D Features for Melanoma Detection, IEEE Access, Vol. 10, No. 0, pp. 76296 - 76309, July, 2022,
| Abstract | BibTex
L. A. Thomaz, S.M.M. Faria, L.M. Távora, L. Marcenaro, Automatic Medical Image Diagnosis: Highlights from the 2021 IEEE 5-Minute Video Clip Contest [SP Competitions], IEEE Signal Processing Magazine, Vol. 39, No. 3, pp. 130 - 134, May, 2022,
| Abstract | BibTex
João M. Santos, L. A. Thomaz, P.A. Assunção, L. A. S. C. Cruz, L.M. Távora, S.M.M. Faria, Hierarchical lossless coding of light fields with improved random access, Signal Processing: Image Communication, Vol. 105, No. 0, pp. 116687 - 116687, March, 2022,
| Abstract | Full text (PDF 8 MBs) | BibTex
Pedro M. M. Pereira, L. A. Thomaz, L.M. Távora, P.A. Assunção, R. Pinto, R. Paiva, S.M.M. Faria, Melanoma Classification using Light-Fields with Morlet Scattering Transform and CNN: surface depth as a valuable tool to increase detection rate, Medical Image Analysis, Vol. 75, No. 75, pp. 102254 - 102254, January, 2022,
| Abstract | BibTex
R. Lourenço, L.M. Távora, P.A. Assunção, L. A. Thomaz, R. Pinto, S.M.M. Faria, Enhancement of light field disparity maps by reducing the silhouette effect and plane noise, Multidimensional Systems and Signal Processing, Vol., No., pp. -, January, 2022,
| Abstract | BibTex
João M. Santos, L. A. Thomaz, P.A. Assunção, L. A. S. C. Cruz, L.M. Távora, S.M.M. Faria, Lossless Coding of Light Fields based on 4D Minimum Rate Predictors, IEEE Transactions on Image Processing, Vol. 31, No. 1, pp. 1708 - 1722, January, 2022,
| Abstract | Full text (PDF 18 MBs) | BibTex
E. Jardim, L. A. Thomaz, E. Silva, S. L. Netto, Domain-Transformable Sparse Representation for Anomaly Detection in Moving-Camera Videos, IEEE Transactions on Image Processing, Vol. 29, No. -, pp. 1329 - 1343, September, 2020,
| Abstract | BibTex
Pedro M. M. Pereira, R. Pinto, R. Paiva, P.A. Assunção, L.M. Távora, L. A. Thomaz, S.M.M. Faria, Dermoscopic skin lesion image segmentation based on Local Binary Pattern Clustering: Comparative study, Biomedical Signal Processing and Control, Vol. 59, No. 101924, pp. 101924 - 101924, May, 2020,
| Abstract | BibTex
L. A. Thomaz, P.A. Assunção, L.M. Távora, S.M.M. Faria, Integer DCT Approximation With Arbitrary Size and Adjustable Precision, IEEE Signal Processing Letters, Vol. 27, No. -, pp. 965 - 969, May, 2020,
| Abstract | Full text (PDF 242 KBs) | BibTex
Pedro M. M. Pereira, R. Pinto, R. Paiva, P.A. Assunção, L.M. Távora, L. A. Thomaz, S.M.M. Faria, Skin lesion classification enhancement using border-line features – The melanoma vs nevus problem, Biomedical Signal Processing and Control, Vol. 57, No. 57, pp. 101765 - 101765, March, 2020,
| Abstract | BibTex
A. F. Silva, L. A. Thomaz, J. O. Pereira, A. M. Castro, T. Farias, S. L. Netto, E. Silva, A. R. Secchi, A morphological approach to the automatic detection of dark fringes of birefringence images obtained in a multipass rheometer, Rheologica Acta, Vol. 59, No. 3, pp. 177 - 200, February, 2020,
| Abstract | BibTex
L. A. Thomaz, E. Jardim, A. F. Silva, E. Silva, S. L. Netto, H. Krim, Anomaly Detection in Moving-Camera Video Sequences Using Principal Subspace Analysis, IEEE Transactions on Circuits and Systems I: Regular Papers, Vol. 65, No. 3, pp. 1003 - 1015, March, 2018,
| Abstract | BibTex
G. H. F. Carvalho, L. A. Thomaz, A. F. Silva, E. Silva, S. L. Netto, Anomaly detection with a moving camera using multiscale video analysis, Multidimensional Systems and Signal Processing, Vol. 30, No. 1, pp. 311 - 342, February, 2018,
| Abstract | BibTex
M. T. Nakahata, L. A. Thomaz, A. F. Silva, E. Silva, S. L. Netto, Anomaly detection with a moving camera using spatio-temporal codebooks, Multidimensional Systems and Signal Processing, Vol. 29, No. 3, pp. 1025 - 1054, March, 2017,
| Abstract | BibTex

27Papers in Conferences

O. Parracho, E. Silva, L. A. Thomaz, L.M. Távora, S.M.M. Faria, Non-Separablewavelet Transform Using Learnable Convolutional Lifting Steps, IEEE International Conference on Image Processing ICIP, Abu Dhabi, United Arab Emirates, Vol., pp. -, October, 2024 | BibTex
D. Nicolau, O. Parracho, L. A. Thomaz, L.M. Távora, S.M.M. Faria, Enhanced residue prediction for Lossless coding of multi- modal image pairs based on image to image translation, IEEE European Workshop on Visual Information Processing - EUVIP, Gjøvik, Norway, Vol., pp. -, September, 2023,
| Abstract | BibTex
E. Paulo, L. A. Thomaz, L.M. Távora, P.A. Assunção, S.M.M. Faria, Extending the compression range of biomedical images for machine vision analysis, European Signal Processing Conference EUSIPCO, Belgrade, Serbia & Montenegro, Vol., pp. 1273 - 1277, September, 2022,
| Abstract | BibTex
T. B. Dias, L. A. Thomaz, E. Silva, S. L. Netto, Change Detection in Moving-Camera Videos Using a Shift-Invariant Dissimilarity Metric, IEEE European Workshop on Visual Information Processing - EUVIP, Conference online, Vol., pp. 1 - 6, September, 2022,
| Abstract | BibTex
R. Lourenço, L. A. Thomaz, E. Silva, S.M.M. Faria, Enhanced Local Optimization Framework for Light Field Disparity Estimation, IEEE European Workshop on Visual Information Processing - EUVIP, Lisbon, Portugal, Vol., pp. 1 - 6, September, 2022,
| Abstract | BibTex
O. Parracho, L. A. Thomaz, L.M. Távora, P.A. Assunção, S.M.M. Faria, Lossless Coding of Multimodal Image Pairs Based on Image-To-Image Translation, IEEE European Workshop on Visual Information Processing - EUVIP, Lisbon, Portugal, Vol., pp. 1 - 6, September, 2022,
| Abstract | BibTex
Pedro M. M. Pereira, L. A. Thomaz, L.M. Távora, P.A. Assunção, R. Pinto, R. Paiva, S.M.M. Faria, Skin lesion classification using features of 3D border lines, Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), Conference online, October, 2021,
| Abstract | BibTex
Pedro M. M. Pereira, L. A. Thomaz, L.M. Távora, P.A. Assunção, R. Pinto, R. Paiva, S.M.M. Faria, Skin Lesion Classification using Bag-of-3D-Features, Conf. on Telecommunications - ConfTele, Conference online, February, 2021,
| Abstract | Full text (PDF 213 KBs) | BibTex
O. Parracho, S.M.M. Faria, L. A. Thomaz, L.M. Távora, P.A. Assunção, Cross-modality Lossless Compression of PET-CT Images, Conf. on Telecommunications - ConfTele, Conference online, February, 2021,
| Abstract | Full text (PDF 340 KBs) | BibTex
S.M.M. Faria, R. Lourenço, L. A. Thomaz, E. Silva, P.A. Assunção, L.M. Távora, Light Field Disparity Map Enhancement with Morphological Filtering, Telecoms Conference ConfTELE, Conference online, February, 2021 | BibTex
J. Filipe, P.A. Assunção, L.M. Távora, R. Pinto, L. A. Thomaz, S.M.M. Faria, Improved Patch-based View Rendering for Focused Plenoptic Cameras with Extended Depth-of-Field, European Signal Processing Conference EUSIPCO, Conference online, January, 2021,
| Abstract | Full text (PDF 318 KBs) | BibTex
L. A. Thomaz, João M. Santos, P.A. Assunção, L.M. Távora, S.M.M. Faria, DISPARITY COMPENSATION OF LIGHT FIELDS FOR IMPROVED EFFICIENCY IN 4D TRANSFORM-BASED ENCODERS, Visual Communications and Image Processing - VCIP, Macau, China, December, 2020 | BibTex
L. A. Thomaz, R. Lourenço, D. R. Castillo, P.A. Assunção, L.M. Távora, S.M.M. Faria, 4D Light Field Disparity Map estimation using Krawtchouk Polynomials, International Conference on Image Processing Theory, Tools and Applications IPTA, Paris, France, November, 2020 | BibTex
T. B. Dias, L. Tavares, R. Padilla, A. F. Silva, L. A. Thomaz, S. L. Netto, E. Silva, Siamese Networks for Bounding-Box to Silhouette Annotation of Video Databases, Sociedade Brasileira de Telecomunicações Simpósio Brasileiro de Telecomunicações e Processamento de Sinais (SBrT) SBrT, Florianópolis, Brazil, Vol., pp. 1 - 5, November, 2020 | BibTex
S.M.M. Faria, L. A. Thomaz, L.M. Távora, P.A. Assunção, R. Pinto, F. Cunha, Robust depth estimation from multi-focus plenoptic images, IEEE International Conference on Image Processing ICIP, Abu Dhabi, United Arab Emirates, October, 2020,
| Abstract | BibTex
R. Lourenço, P.A. Assunção, L.M. Távora, L. A. Thomaz, R. Pinto, S.M.M. Faria, Edge reconstruction method to improve depth estimation from light fields, EURASIP European Light Field Imaging Workshop ELFI, Borovets, Bulgaria, June, 2019,
| Abstract | BibTex
L. A. Thomaz, João M. Santos, P. Astola, S.M.M. Faria, P.A. Assunção, M. Carvalho, E. Silva, C.L.P. Pagliari, I. Tabus, M. Pereira, GOA Alves, F. Pereira, V. Testoni, P. Freitas, I. Seidel, Visually Lossless Compression of Light Fields, EURASIP European Light Field Imaging Workshop ELFI, Borovets, Bulgaria, June, 2019,
| Abstract | BibTex
S.M.M. Faria, M. Santos, P.A. Assunção, L.M. Távora, L. A. Thomaz, Pedro M. M. Pereira, R. Pinto, F. Santiago, V. Dominguez, M. Henrique, Dermatological Imaging using a Focused Plenoptic Camera: the SKINL2 Light Field Dataset, Conf. on Telecommunications - ConfTele, Lisboa, Portugal, June, 2019,
| Abstract | Full text (PDF 16 MBs) | BibTex
B. M. Afonso, L. P. Cinelli, L. A. Thomaz, A. F. Silva, E. Silva, S. L. Netto, Moving-Camera Video Surveillance in Cluttered Environments Using Deep Features, IEEE International Conference on Image Processing ICIP, Athens, Greece, Vol., pp. 2296 - 2300, October, 2018,
| Abstract | BibTex
A. F. Silva, L. A. Thomaz, E. Silva, S. L. Netto, Online video-based sequence synchronization for moving camera object detection, IEEE International Workshop on Multimedia Signal Processing MMSP, Luton, United Kingdom, October, 2017,
| Abstract | BibTex
L. P. Cinelli, L. A. Thomaz, A. F. Silva, E. Silva, S. L. Netto, Foreground Segmentation for Anomaly Detection in Surveillance Videos Using Deep Residual Network, Sociedade Brasileira de Telecomunicações Simpósio Brasileiro de Telecomunicações e Processamento de Sinais SBrT, São Pedro - SP, Brazil, September, 2017 | BibTex
L. A. Thomaz, A. F. Silva, S. L. Netto, E. Silva, H. Krim, Detection of abandoned objects using robust subspace recovery with intrinsic video alignment, IEEE International Symposium on Circuits and Systems ISCAS, Baltimore, United States, May, 2017,
| Abstract | BibTex
L. A. Thomaz, A. F. Silva, A. M. Castro, J. O. Pereira, S. L. Netto, E. Silva, A. R. Secchi, A morphological approach to the automatic detection of dark fringes applied to birefringence images, IEEE International Conference on Image Processing ICIP, Phoenix, United States, October, 2016,
| Abstract | BibTex
A. F. Silva, L. A. Thomaz, E. Silva, S. L. Netto, Alinhamento de sinais obtidos em trajetórias fechadas utilizando um conjunto genérico de sensores, Simpósio Brasileiro de Telecomunicações SBrT, Santarém, Brazil, September, 2016 | BibTex
L. A. Thomaz, A. F. Silva, E. Silva, S. L. Netto, X. Bian, H. Krim, Abandoned object detection using operator-space pursuit, IEEE International Conference on Image Processing ICIP, Québec, Canada, October, 2015,
| Abstract | BibTex
A. F. Silva, F. Kucharczak, L. A. Thomaz, G. H. F. Carvalho, E. Silva, S. L. Netto, Comparison and Optimization of Image Descriptors for Real-Time Detection of Abandoned Objects, UNICAMP Simpósio de Processamento de Sinais da UNICAMP SPS, Campinas, São Paulo, Brazil, September, 2014,
| Abstract | BibTex
A. F. Silva, L. A. Thomaz, G. H. F. Carvalho, M. T. Nakahata, J. F. L. Oliveira, E. Silva, S. L. Netto, An annotated video database for abandoned-object detection in a cluttered environment, Sociedade Brasileira de Telecomunicações International Telecommunications Symposium ITS, São Paulo, Brazil, August, 2014,
| Abstract | BibTex

Projects

Closed Projects3

Acronym	Name	Funding Agency	Start date	Ending date
CIBME	CIBME - Compressão de Imagens Biomédicas de Modalidades Emergentes	IT/LA	01-05-2020	31-12-2023
CoMBINNe	Compression of Multimodal Biomedical Images using Neural Networks	FCT	12-03-2023	11-03-2025
PlenoISLA	Plenoptic imaging for skin lesion assessment	FCT/POCI, P2020	25-07-2018	31-12-2021

Other Scientific Achievements

1Awards

L. A. Thomaz, ANP Technological Innovation Award, Brazilian National Oil Agency Award for technological innovation on the oil extraction industry, 31-07-2017

Other Contributions

1Editorial Committees

Associate Editor, IEEE Open Journal of Signal Processing, 04-05-2022 - 03-05-2025

9Refereeing Journals

IEEE Transactions on Circuits and Systems I: Regular Papers
2017, 1 review(s);
Eurasip Journal on Image and Video Processing
2018, 1 review(s);
Signal Processing: Image Communication
2019, 1 review(s);
IEEE Access
2019, 1 review(s);
IEEE Transactions on Circuits and Systems for Video Technology
2019, 1 review(s);
IEEE Signal Processing Letters
2021, 1 review(s);
Journal of Digital Imaging
2020, 1 review(s);
IEEE Transactions on Image Processing
2022, 2 review(s); 2019, 1 review(s);
IEEE Open Journal of Signal Processing
2023, 1 review(s);

6Refereeing Conferences

IEEE International Conference on Acoustics, Speech, and Signal Processing ICASSP
2017, 1 review(s);
IEEE International Conference on Image Processing ICIP
2023, 1 review(s); 2022, 1 review(s); 2021, 1 review(s);
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)
2024, 1 review(s); 2023, 1 review(s); 2022, 1 review(s);
IEEE European Workshop on Visual Information Processing - EUVIP
2023, 1 review(s);
IEEE International Symp. on Circuits and Systems - ISCAS
2023, 1 review(s);
Simpósio Brasileiro de Telecomunicações SBrT
2023, 1 review(s); 2022, 1 review(s); 2021, 1 review(s);