This is me in Long Beach

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myself in a nutshell: a passionate scientist.

About me

Thiago Lopes Trugillo da Silveira is an Assistant Professor ("Professor Adjunto") at the Institute of Informatics from the Federal University of Rio Grande do Sul (UFRGS), Brazil. He holds a D.Sc. degree in Computer Science (2019) from UFRGS, an M.Sc. degree in Computer Science (2016), and B.Sc. degrees in Information Systems (2015) and Computer Science (2013) from the Federal University of Santa Maria (UFSM), Brazil. Member of the Brazilian Computer Society (SBC) and researcher of the Signal Processing Group @ Stats and the Computer Graphics, Image Processing, and Interaction Group. His current interests include signal, image, and video processing, pattern recognition, and computer vision.

Education

Doctorate in Computer Science
Period:
2016 - 2019
University:
Federal University of Rio Grande do Sul
Dissertation:

Dense 3D Indoor Scene Reconstruction from Spherical Images PDF BibTeX

Advisor:
Cláudio Rosito Jung
Final average grade:
"A"
Master in Computer Science
Period:
2014 - 2016
University:
Federal University of Santa Maria
Thesis:

Sleep Stages Classification Through Application of the Discrete Wavelet Transform on a Single Electroencephalogram Channel PDF BibTeX

Advisor:
Alice de Jesus Kozakevicius
Coadvisor:
Cesar Ramos Rodrigues
Final average grade:
"A"
Bachelor in Information Systems
Period:
2014 - 2015
University:
Federal University of Santa Maria
Thesis:

Development and Implementation of a System for Recognition of Characteristic X-Ray Spectra of Minerals PDF BibTeX

Advisor:
José Antônio Trindade Borges da Costa
Final average grade:
8.76
Bachelor in Computer Science
Period:
2010 - 2013
University:
Federal University of Santa Maria
Thesis:

16-point DCT Approximations with Low Arithmetic Complexity for Image Compression PDF BibTeX

Advisor:
Alice de Jesus Kozakevicius
Coadvisor:
Fábio Mariano Bayer
Final average grade:
8.64

Teaching

Federal University of Rio Grande do Sul
  • Assistant Professor (2020 - current)
    • Data Structures I (x7)
    • Algorithms and Programming (x4)
    • Imperative Programming (x1)
    • Introduction to Programming (x5)
    • Object-Oriented Programming (x2)
    • Computer Vision and Image Processing (x3)
  • Temporary Lecturer (2019 - 2020)
    • Introduction to Programming (x6)
Federal University of Rio Grande
  • Assistant Professor (2020 - 2020)
    • Discrete Mathematics (x2)
    • Algorithms and Data Structures I (x2)
Sul-rio-grandense Federal Institute of Education, Science and Technology
  • Assistant Professor (2020 - 2020)
    • Web Pages Construction (x2)
    • Web Pages Construction I (x2)
    • Web Programming Languages I (x1)
    • Parallel and Distributed Architectures (x1)

Awards

  • Honorable Mention Award - Ph.D. Thesis Category, Workshop of Theses and Dissertations of the Conference on Graphics, Patterns and Images (SIBGRAPI), 2020.

  • Odelar Leite Linhares Award of Best Master Thesis, Brazilian Society of Computational and Applied Mathematics (SBMAC), 2016.

  • Featured Student Award in Computer Science from the Federal University of Santa Maria, Brazilian Computer Society (SBC), 2013.

Publications

Journal papers
  1. Balreira, D. G. and Silveira, T. L. T.; Triangular matrix-based lossless compression algorithm for 3D mesh connectivity; The Visual Computer; Springer; To appear; 2024.

  2. Silveira, T. L. T. and Jung, C. R.; Omnidirectional Visual Computing: Foundations, Challenges, and Applications; Computers & Graphics; Elsevier; volume 113; p. 89-101; 2023. DOI BibTeX

  3. Silveira, T. L. T., Pinto, P. G. L., Lermen, T. S., and Jung, C. R.; Omnidirectional 2.5D Representation for COVID-19 Diagnosis using Chest CTs; Journal of Visual Communication and Image Representation; Elsevier; volume 91; number 103775; 2023. DOI BibTeX

  4. Silveira, T. L. T., Pinto, P. G. L., Llerena, J. E. M., and Jung, C. R.; 3D Scene Geometry Estimation from 360° Imagery: A Survey; Computing Surveys; ACM; volume 55; issue 4; number 68; 2023. arXiv DOI BibTeX

  5. Balreira, D. G., Silveira, T. L. T., and Wickboldt, J. A.; Investigating the Impact of Adopting Python and C Languages for Introductory Engineering Programming Courses; Computer Applications in Engineering Education; Wiley; volume 31; issue 1; p. 47-62; 2023. DOI BibTeX

  6. Radünz, A. P., Silveira, T. L. T., Bayer, F. M., and Cintra, R. J.; Data-independent low-complexity KLT approximations for image and video coding; Signal Processing: Image Communication; Elsevier; volume 101; number 116585; 2022. arXiv DOI BibTeX

  7. Silveira, T. L. T., Canterle, D. R., Coelho, D. F. G., Coutinho, V. A., Bayer, F. M., and Cintra, R. J.; A Class of Low-Complexity DCT-like Transforms for Image and Video Coding; Transactions on Circuits and Systems for Video Technology; IEEE; volume 32; issue 7; p. 4364-4375; 2022. arXiv DOI BibTeX

  8. Silveira, T. L. T., Oliveira, A. Q., Walter, M., and Jung, C. R.; Fast and Accurate Superpixel Algorithms for 360º Images; Signal Processing; Elsevier; volume 189; number 108277; 2021. DOI BibTeX

  9. Oliveira, A. Q., Silveira, T. L. T., Walter, M., and Jung, C. R.; A Hierarchical Superpixel-based Approach for DIBR View Synthesis; Transactions on Image Processing; IEEE; volume 30; p. 6408-6419; 2021. DOI BibTeX

  10. Canterle, D. R., Silveira, T. L. T., Bayer, F. M., and Cintra, R. J.; A Multiparametric Class of Low-complexity Transforms for Image and Video Coding; Signal Processing; Elsevier; volume 176; number 107685; 2020. arXiv DOI BibTeX

  11. Oliveira, R. S., Cintra, R. J., Bayer, F. M., Silveira, T. L. T., Leite, A., and Madanayake, A.; Low-complexity 8-point DCT approximation based on angle similarity for image and video coding; Multidimensional Systems and Signal Processing; Springer; volume 30; issue 3; p. 1363-1394; 2019. arXiv DOI BibTeX

  12. Coelho, D. F. G., Cintra, R. J., Bayer, F. M., Kulasekera, S., Madanayake, A., Oliveira, P. A. M., Silveira, T. L. T., Oliveira, R. S., and Dimitrov, V.; Low-complexity Loeffler DCT Approximations for Image and Video Coding; Journal of Low Power Electronics and Applications; MDPI; volume 8; issue 4; number 46; 2018. arXiv DOI BibTeX

  13. Braun, E. T., Silveira, T. L. T., Kozakevicius, A. J., Rodrigues, C. R., and Baratto, G.; Sleep stages classification using spectral based statistical moments as features; Revista de Informática Teórica e Aplicada; UFRGS; volume 25; issue 1; p. 11-22; 2018. DOI BibTeX

  14. Tablada, C. J., Silveira, T. L. T., Cintra, R. J., and Bayer, F. M.; DCT approximations based on Chen's factorization; Signal Processing: Image Communication; Elsevier; volume 58; p. 14-23; 2017. arXiv DOI BibTeX

  15. Silveira, T. L. T., Oliveira, R. S., Bayer, F. M., Cintra, R. J., and Madanayake, A.; Multiplierless 16-point DCT approximation for low-complexity image and video coding; Signal, Image and Video Processing; Springer; volume 11; issue 2; p. 227-233; 2017. arXiv DOI BibTeX

  16. Silveira, T. L. T., Kozakevicius, A. J., and Rodrigues, C. R.; Single-channel EEG sleep stage classification based on a streamlined set of statistical features in wavelet domain; Medical & Biological Engineering & Computing; Springer; volume 55; issue 2; p. 343-352; 2017. DOI BibTeX

  17. Silveira, T. L. T., Kozakevicius, A. J., and Rodrigues, C. R.; Automated drowsiness detection through wavelet packet analysis of a single EEG channel; Expert Systems with Applications; Elsevier; volume 55; p. 559-565; 2016. DOI BibTeX

  18. Silveira, T. L. T., Bayer, F. M., Cintra, R. J., Kulasekera, S., Madanayake, A., and Kozakevicius, A. J.; An orthogonal 16-point approximate DCT for image and video compression; Multidimensional Systems and Signal Processing; Springer; volume 27; issue 1; p. 87-104; 2016. arXiv DOI BibTeX

Books
  1. Silveira, T. L. T. and Kozakevicius, A. J.; Transformada Wavelet de Haar: conceitos, formulações e aplicações; Colóquios de Matemática das Regiões - Região Sul; edição 1; Sociedade Brasileira de Matemática; 2016. PDF ISBN BibTeX

Book chapters
  1. Silveira, T. L. T. and Jung, C. R.; Processamento de Imagens Omnidirecionais e Aplicações; Escola de Computação PPGC/UFRGS 50 Anos: Transformando Desafios em Oportunidades Para o Futuro; edição 1; Sociedade Brasileira de Computação (SBC); capítulo 2; p. 29-52; 2023. PDF DOI BibTeX

  2. Bazzan, A. L. C., Tavares, A. R., Pereira, A. G., Jung, C. R., Scharcanski, J., Carbonera, J., Lamb, L. C., Recamonde-Mendoza, M., Silveira, T. L. T., and Moreira, V.; "A Nova Eletricidade": Aplicações, Choques e Tendências da IA Moderna; Escola de Computação PPGC/UFRGS 50 Anos: Transformando Desafios em Oportunidades Para o Futuro; edição 1; Sociedade Brasileira de Computação (SBC); capítulo 8; p. 167-208; 2023. arXiv PDF DOI BibTeX

  3. Coelho, D. F. G., Coutinho, V. A., Silveira, T. L. T., Cintra, R. J., Bayer, F. M., Madanayake, A., and Dimitrov V. S.; Discrete Transform Approximations for Video Coding; VLSI Architectures for Future Video Coding; edition 1; Institution of Engineering and Technology; p. 257-297; 2019. DOI BibTeX

  4. Pasin, M. and Silveira, T. L. T.; Improving Public Transport Management: A Simulation Based on the Context of Software Multi-agents; Advances in Intelligent Systems and Computing; edition 1; Springer; p. 323-329; 2013. DOI BibTeX

Conference papers
  1. Remus, J. C. and Silveira, T. L. T.; An end-to-end RoI-based encoder-decoder for fetal ECG recovery and QRS complex detection; IEEE Medical Measurements and Applications (MeMeA); To appear; 2024.

  2. Veras, M. S. T. and Silveira, T. L. T.; Classificação Multirrótulo Aplicada a Imagens Omnidirecionais; Extended Proceedings of the Conference on Graphics, Patterns and Images (SIBGRAPI/WiP); p. 95-100; 2023. PDF DOI BibTeX

  3. Becker, A. G., Cenci, M. P., Silveira, T. L. T., and Veit, H. M.; Sorting of Smartphone Components for Recycling Through Convolutional Neural Networks; Extended Proceedings of the Conference on Graphics, Patterns and Images (SIBGRAPI/WIA); p. 176-182; 2023. arXiv PDF DOI BibTeX

  4. Segala, E. B. and Silveira, T. L. T.; Explorando Poda de Transformada na Compressão de Imagens em 360º; Extended Proceedings of the Conference on Graphics, Patterns and Images (SIBGRAPI/WiP); p. 88-91; 2022. PDF DOI BibTeX

  5. Silveira, T. L. T. and Jung, C. R.; Visual Computing in 360º: Foundations, Challenges, and Applications; Proceedings of the Conference on Graphics, Patterns and Images (SIBGRAPI); p. 302-307; 2022. PDF DOI BibTeX

  6. Oliveira, A. Q., Silveira, T. L. T., Walter, M., and Jung, C. R.; A Temporally Coherent Background Model for DIBR View Synthesis; Proceedings of the IEEE International Conference on Image Processing (ICIP); p. 3682-3686; 2022. DOI BibTeX

  7. Llerena, J. E. M., Silveira, T. L. T., and Jung, C. R.; Pose Estimation for Two-View Panoramas based on Keypoint Matching: a Comparative Study and Critical Analysis; Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW); p. 5198-5207; 2022. PDF DOI BibTeX

  8. Bergmann, M. A., Pinto, P. G. L., Silveira, T. L. T., and Jung, C. R.; Gravity Alignment for Single Panorama Depth Inference; Proceedings of the Conference on Graphics, Patterns and Images (SIBGRAPI); p. 41-48; 2021. PDF DOI BibTeX

  9. Silveira, T. L. T. and Jung, C. R.; Dense 3D Indoor Scene Reconstruction from Spherical Images; Extended Proceedings of the Conference on Graphics, Patterns and Images (SIBGRAPI/WTD); p. 8-14; 2020. PDF DOI BibTeX

  10. Avelar, P. H. C., Tavares, A. R., Silveira, T. L. T., Jung, C. R., and Lamb, L. C.; Superpixel Image Classification with Graph Attention Networks; Proceedings of the Conference on Graphics, Patterns and Images (SIBGRAPI); p. 203-209; 2020. arXiv PDF DOI BibTeX

  11. Silveira, T. L. T. and Jung, C. R.; Perturbation Analysis of the 8-Point Algorithm: a Case Study for Wide FoV Cameras; Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR); p. 11757-11766; 2019. PDF DOI BibTeX

  12. Silveira, T. L. T. and Jung, C. R.; Dense 3D Scene Reconstruction from Multiple Spherical Images for 3-DoF+ VR Applications; Proceedings of the IEEE Conference on Virtual Reality and 3D User Interfaces (VR); p. 9-18; 2019. DOI BibTeX

  13. Oliveira, A. Q., Silveira, T. L. T., Walter, M., and Jung, C. R.; On the Performance of DIBR Methods when Using Depth Maps from State-of-the-art Stereo Matching Algorithms; Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP); p. 2272-2276; 2019. DOI BibTeX

  14. Silveira, T. L. T., Dal'Aqua, L. P., and Jung, C. R.; Indoor Depth Estimation from Single Spherical Images; Proceedings of the IEEE International Conference on Image Processing (ICIP); p. 2935-2939; 2018. DOI BibTeX

  15. Silveira, T. L. T. and Jung, C. R.; Evaluation of Keypoint Extraction and Matching for Pose Estimation Using Pairs of Spherical Images; Proceedings of the Conference on Graphics, Patterns and Images (SIBGRAPI); p. 374-381; 2017. PDF DOI BibTeX

  16. Silveira, T. L. T., Kozakevicius, A. J., and Rodrigues, C. R.; Classificação de estágios de sono através da aplicação de DWT sobre um único canal de EEG; Proceeding Series of the Brazilian Society of Applied and Computational Mathematics; volume 5; issue 1; p. 1-7; 2016. DOI BibTeX

  17. Silveira, T. L. T., Kozakevicius, A. J., and Rodrigues, C. R.; Awake/Sleep Scoring Through Wavelet Analysis Associated to Decision Tree Algorithms; Anais do 30º Simpósio Sul de Microeletrônica (SIM); 2015. PDF BibTeX

  18. Silveira, T. L. T., Pasin, M., and Lima, J. C. D.; Experimental Evaluation of Intersection Control Policies: a Simulation Based on Ubiquitous Computing and VANETs; Proceedings of XL Conferencia Latinoamericana en Informática (CLEI); 2014. DOI BibTeX

  19. Silveira, T. L. T., Bayer, F. M., Cintra, R. J. S., and Kozakevicius, A. J.; Algoritmos Rápidos para Cifragem de Imagens Utilizando Aproximações da DCT de Comprimento 8; Proceeding Series of the Brazilian Society of Applied and Computational Mathematics; volume 2; issue 1; 2014. DOI BibTeX

  20. Silveira, T. L. T., Rodrigues, C. R., and Kozakevicius, A. J.; Técnicas de Reamostragem de Sinais e seus Impactos no Processamento Digital nos Domínios do Tempo e da Frequência; Anais do Primer Encuentro de Jóvenes Investigadores en Matemática Aplicada de la Asociación de Universidades Grupo Montevideo (AUGM); p. 39-40; 2014. PDF BibTeX

  21. Silveira, T. L. T. and Pasin, M.; Provimento de Informações sobre Transporte Público Urbano para Empresas Concessionárias: Simulação e Avaliação Apoiada por um Sistema Multi-agentes; Anais do IX Simpósio Brasileiro de Sistemas de Informação (SBSI); volume 1; p. 565-576; 2013. PDF BibTeX

  22. Silveira, T. L. T. and Pasin, M.; Aplicação de Algoritmos de Escalonamento de Processos para Gerenciamento de Interseções em VANETs; Anais da 11ª Escola Regional de Redes de Computadores (ERRC); volume 1; p. 39-42; 2013. PDF BibTeX

  23. Silveira, T. L. T. and Pasin, M.; Aplicação de algoritmos de escalonamento de processos como proposta de solução para resolução de conflitos em cruzamentos de múltiplas vias de trânsito; Anais da 28ª Jornada Acadêmica Integrada da Universidade Federal de Santa Maria; 2013. PDF BibTeX

  24. Jacobi, O. F., Silveira, T. L. T., and Bayer, F. M.; Avaliação do impacto da ordem da DCT em compressão de imagens do tipo JPEG; Anais da 28ª Jornada Acadêmica Integrada da Universidade Federal de Santa Maria; 2013. PDF BibTeX

  25. Puhlmann, H. S. K., Silveira, T. L. T., Azevedo, B. R., and Augustin, I.; MedAlert; Anais da 26ª Jornada Acadêmica Integrada da Universidade Federal de Santa Maria; 2011. PDF BibTeX

Regular and software patents
  1. Silveira, T. L. T. and Jung, C. R.; SNICS: um método para supersegmentação de imagens esféricas; Instituto Nacional da Propriedade Industrial (INPI); BR512019002934-8; 2019. BibTeX

  2. Silveira, T. L. T. and Costa, J. A. T. B.; Método para Reconhecimento de Espectros de Raios X Característicos de Minerais; Instituto Nacional da Propriedade Industrial (INPI); BR512019000482-5; 2019. BibTeX

  3. Silveira, T. L. T., Bayer, F. M., and Cintra, R. J.; Método para o Cômputo Aproximado da Transformada Discreta do Cosseno de Comprimento 16 com Baixo Custo Aritmético em Aplicações de Compressão de Imagem e Vídeo; Instituto Nacional da Propriedade Industrial (INPI); BR1020150322720; 2015. BibTeX

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