Computer Graphics
Topics in Computer Graphics that consistently capture my interest include:
Periodic Tilings of Regular Polygons
A tiling of the plane by polygons is a subdivision of the plane into bounded polygonal regions that either are disjoint, share a vertex, or share an edge. Restricting the faces of the tiling to be regular polygons brings lots of rigidity while still allowing much interesting variety. Tiling the plane with regular polygons is a fascinating subject, both mathematically and graphically, with a long history.
In 2017, the book "SOBRE MALHAS ARQUIMEDIANAS", co-authored with my father Ricardo Sá, has been published (in Portuguese). The book is the result of organising the collection built along several years on CAD drawings of periodic tilings of regular polygons.
In 2018, a new phase of the research started, towards the algorithmic formalisation of the subject, in collaboration with Luiz Henrique de Figueiredo and J. Ezequiel Soto Sanchez. In May 2019, Tim Weyrich joined the group.
Research Results:
2021 - An integer representation for periodic tilings of the plane by regular polygons, co-authored with Luiz Henrique de Figueiredo, J. Ezequiel Soto Sanchez and Tim Weyrich. Published at Computer & Graphics Journal.
2020 - José Ezequiel Soto Sánchez PhD thesis; On Periodic Tilings with Regular Polygons (Visgraf/IMPA)
Best PhD Thesis Award, SIBGRAPI 2021 (award, presentation, pdf)
Tese de Doutorado - Prêmio Destaque da Comissão do CNMAC 2021 (destaque)
2019 - Acquiring periodic tilings of regular polygons from images - in The Visual Computer Journal, presented at CGI 2019.
2018 - Synthesizing Periodic Tilings of Regular Polygons - presented at Sibgrapi 2018.
2018 - Ciclo de Palestras e lançamento do livro SOBRE MALHAS ARQUIMEDIANAS no Visgraf/IMPA.
2017 - Book Published: SOBRE MALHAS ARQUIMEDIANAS, Brazil [in Portuguese]
For additional information, please visit the "Synthesizing Periodic Tilings" project website.
Digital Fabrication Techniques
From December 2015 until August 2016 and from July 2012 to January 2013 I´ve been in a post-doc position at the Cultural Informatics Research Group (CIRG) at the Brighton University, Brighton, UK. Both post-doc research visits were sponsored by CAPES. The topics of research included digital fabrication techniques from the computer graphics perspective. Here follows some research results achieved in collaboration with prof. Karina Rodriguez Echavarria:
2016 - State of The Art on Functional Fabrication - presented at GraDiFab 2016
2015 - Adaptive voids, The Visual Computer, also presented at CGI 2015
2014 - Graphics for 3D Printing, Sibgrapi 2014 Tutorial
2013 - Dual joints for 3D-structures, The Visual Computer - also presented at CGI 2013
[2006 - 2008] I contributed in graphics and vision projects projects at Tecgraf/PUC-Rio.
[2002 - 2006] My PhD thesis entitled "Controlling Illumination to Increase Image Information" was developed under the supervision of P.C. Carvalho at Visgraf/IMPA . It summarizes my work on several applications exploring of active illumination control during image capture.
** A poster highlighting the main contributions of my PhD Thesis was produced: "The Graphics News" hypothetical newspaper (as illustrated); for the Workshop of Thesis and Dissertations at Sibgrapi 2007. **
[2000 - 2001] My Master Dissertation entitled "Quantização de cores em imagens: um caso do problema de análise de conglomerados" was developed at DMA/IM/UFRJ under the co-supervision of P.C. Carvalho at Visgraf/IMPA.
