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I 'm a researcher @ IMPA and member of the Visgraf laboratory. I am also a visiting researcher @ Google DeepMind, working with André Araujo . My current research is in the intersection of Computer Graphics and Machine Learning.
Before coming to IMPA, I obtained my Ph.D. in applied mathematics at Pontifical Catholic University of Rio de Janeiro, advised by Carlos Tomei and João Paixão. My thesis introduced the discrete line fields as an extension of Forman's discrete Morse theory.
I received my M.Sc. degree in Mathematics at Universidade Federal de Alagoas, supervised by Thales Miranda and Dimas Martínez with an emphasis on discrete differential geometry.
Publications
Tuning the Frequencies: Robust Training for Sinusoidal Neural Networks
Tiago Novello*, Diana Aldana*, Andre Araujo, Luiz Velho
CVPR, 2025 (Highlight)
[paper]
Understanding Sinusoidal Neural Networks
Tiago Novello
Technical report, arXiv, 2023
SASNet: Spatially-Adaptive Sinusoidal Neural Networks
Haoan Feng, Diana Aldana, Tiago Novello, Leila De Floriani
arXiv, 2025
[paper]
Spectral Periodic Networks for Neural Rendering
Hallison Paz, Tiago Novello, Luiz Velho
SIGGRAPH Posters, 2024
[paper]
Neural Implicit Morphing of Face Images
Guilherme Schardong,* Tiago Novello*, Vinicius da Silva, Hallison Paz, Iurii Medvedev, Luiz Velho, Nuno Gonçalves
CVPR, 2024
Implicit Neural Representation of Tileable Material Textures
Hallison Paz, Tiago Novello, Luiz Velho
arXiv, 2024
[arXiv]
Neural Implicit Surface Evolution
Tiago Novello, Vinicius da Silva, Guilherme Schardong, Luiz Schirmer, Helio Lopes, Luiz Velho
ICCV, 2023
How to train your (neural) dragon
Luiz Schirmer, Tiago Novello, Vinicius da Silva, Guilherme Schardong, Helio Lopes, Luiz Velho
Tutorial, SIBGRAPI, 2023.
Geometric implicit neural representations for signed distance functions
Luiz Schirmer, Tiago Novello, Vinícius da Silva, Guilherme Schardong, Daniel Perazzo, Hélio Lopes, Nuno Gonçalves, Luiz Velho
Extension to Computer & Graphics, 2024
Multiresolution Neural Networks for Imaging
Hallison Paz, Daniel Perazzo, Tiago Novello, Guilherme Schardong, Luiz Schirmer, Vinicius da Silva, Daniel Yukimura, Fabio Chagas, Helio Lopes, Luiz Velho
Technical paper, SIBGRAPI, 2022
Extension to Computer & Graphics, 2023
Neural Implicit Mapping via Nested Neighborhoods
Vinícius da Silva, Tiago Novello, Guilherme Schardong, Luiz Schirmer, Hélio Lopes, Luiz Velho
arXiv, 2022
[arXiv]
Exploring Differential Geometry in Neural Implicits
Tiago Novello, Guilherme Schardong, Luiz Schirmer, Vinicius da Silva, Helio Lopes, Luiz Velho
Computer & Graphics, 2022
[paper][published version][arXiv][page]
GPU Ray Tracing in Non-Euclidean Spaces
Tiago Novello, Vinícius da Silva, Luiz Velho
Morgan and Claypool, 2022.
[book]
How to see the eight Thurston geometries
Tiago Novello, Vinícius da Silva, Luiz Velho, Mikhail Belolipetsky
Ensaios Matemáticos, 2021.
Real-time rendering of complex fractals
Vinícius da Silva, Tiago Novello, Hélio Lopes, Luiz Velho
Ray Tracing Gems II, chapter 33, 2021.
Discrete line fields on surface
Tiago Novello, João Paixão, Carlos Tomei, Thomas Lewiner
Topology and its Applications, 2021.
Proceduray -- A light-weight engine for procedural primitive ray tracing
Vinícius da Silva, Tiago Novello, Hélio Lopes, Luiz Velho
arXiv, 2020.
Global Illumination of Non-Euclidean Spaces
Tiago Novello, Vinícius da Silva, Luiz Velho
Visualization of Nil, Sol, and SL2 Geometries
Tiago Novello, Vinícius da Silva, Luiz Velho
Computers & Graphics, 2020.
Design and visualization of Riemannian metrics
Tiago Novello, Vinícius da Silva, Luiz Velho
arXiv, 2020.
Illustrating Mathematics, chapter Video and Virtual Reality, Pg 71, AMS
Tiago Novello, Vinícius da Silva, Luiz Velho
Immersive Visualization of the Classical Non-Euclidean Spaces using Real-Time Ray Tracing in VR
Luiz Velho, Vinícius da Silva, Tiago Novello,
In Proceedings of the 46th Graphics Interface, 2020,
Discrete gradient line fields on surfaces
Tiago Novello, Thomas Lewiner, João Paixão, Carlos Tomei
arXiv, 2017
Greedy Morse matchings and discrete smoothness
Joao Lagoas, Thomas Lewiner, Tiago Novello, Joao Paixao
arXiv, 2017
Tiago Novello, Thiago Gomes, Thales Vieira, Rodrigo de Toledo, Thomas Lewiner
Researchgate, 2018
Masters Thesis, advised by Thales Miranda and Dimas Martínez,
UFAL , 2014
Graduation Thesis, advised by Valdete Coqueiro and Rosangela Teixeira
FECILCAM, 2011
Differential equations applied in compartiment models
Tiago Novello, Valdete Coqueiro, Rosangela Teixeira
Encontro de Produção Científica e Tecnológica, 2011
Research interests
Computational topology and geometry
Discrete Morse theory
Discrete differential geometry
Visualization
Neural implicits
Collaborators
Hélio Lopes
Guilherme Schardong
Luiz Schirmer
Hallison Paz
Daniel Perazzo
Fábio Suim
João Lagoas
Mentoring
Diana Aldana (Master's student)
Daniel Perazzo (Master's student)
Teaching
2024.2, Neural 3D Vision, IMPA
2018.2, Introduction to computer graphics and Calculus, UFRJ
2018.1, Introduction to computer graphics and Combinatorics, UFRJ
2014.1, Calculus (laboratory) , PUC-Rio
Presentations
Exploring differential geometry in neural implicits, at Sibgrapi 2022
Multiresolution Neural Networks for Imaging, at Sibgrapi 2022
Neural Networks for Implicit Representations of 3D Geometry, at Sibgrapi 2021
Global Illumination of Non-Euclidean Spaces, at Sibgrapi 2020
Immersive Visualization of the Classical Non-Euclidean Spaces using Real-Time Ray Tracing in VR, at GI2020
Contact
E-mail: tiago.novello@impa.br
Mailing Address:
Estrada Dona Castorina, 110
Jardim Botânico | CEP 22460-320
Rio de Janeiro, RJ - Brasil
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