Gonçalo Valadão




Instituto Superior Técnico

Instituto de Telecomunicações

Torre Norte, Piso 10,

Av. Rovisco Pais, 1049-001 Lisboa,



Torre Norte, Piso 10
Av. Rovisco Pais
1049-001  Lisboa


Hello, I am a third year PhD student in Electrical and Computer Engineering at IST.  I work in phase unwrapping and I am advised by Professor José Bioucas-Dias. My interests include image reconstruction/restoration/segmentation, low level computer vision, optimization/graph-cuts.


I have graduated in Engineering Physics at IST DF (Licenciatura — five years degree) and I have earned an MSc in Geographical Information Systems at IST DECivil. Before going into PhD, I have worked in consultancy at Andersen Consulting (when I joined), Accenture (when I left), and in R&D at ICIST.



CAPE: Combinatorial absolute phase estimation. G. Valadão and J. Bioucas-Dias, Technical Report, IT/IST Communications Theory and Pattern Recognition Group, Lisboa, Portugal, 2009. Matlab Code (plus embedded C++) for Windows.


From diversity and denoising to phase imaging. G. Valadão and J. Bioucas-Dias, Proc. Of the 7th Conference on Telecommunications, ConfTele2009, Santa Maria da Feira, Portugal, May  3—5, 2009.


Phase Imaging: Unwrapping and Denoising with Diversity and Multi-Resolution. G. Valadão and J. Bioucas-Dias, Proc. of 2008 International Workshop on Local and Non-Local Approximation in Image Processing, LNLA2008, Lausanne, Switzerland, August 23-24, 2008.


Phase Unwrapping via Diversity and Graph Cuts. J. Bioucas-Dias  and G. Valadão, Proc. of IWSSIP 2008, Bratislava, Slovak Republic, June 25-28.


PUMA: Phase Unwrapping via Max Flows. G. Valadão and J. Bioucas-Dias, Proc. Conf. on Telecommunications - ConfTele, Peniche, Portugal , Vol. 1, pp. 609 - 612, May, 2007.


Phase Unwrapping via Graph Cuts. J. Bioucas-Dias and G. Valadão, IEEE Trans. on Image Processing , Vol. 16 , No. 3 , pp. 698 - 709 , March, 2007. Matlab code.


Radar Interferometry: 2D Phase Unwrapping via Graph Cuts. G. Valadão, MSc. Thesis, Instituto Superior Tecnico da Universidade Tecnica de Lisboa, January, 2006.  


Discontinuity preserving phase unwrapping using graph cuts. J. Bioucas-Dias and G. Valadão, Proc Energy Minimization Methods in Computer Vision and Pattern Recognition—EMMCVPR, St. Augustine, United States , Vol. 1 , pp. 268 - 284, November, 2005.


Phase unwrapping: a new max-flow/min-cut based approach. J. Bioucas-Dias, Proc. IEEE International Conf. on Image Processing - ICIP, Genova, Italy, Vol. 2, pp. 77 - 80, September, 2005. 


Phase Unwrapping via Graph Cuts. J. Bioucas-Dias and G. Valadão, Proc. Iberian Conf. on Pattern Recognition and Image Analysis, Cascais, Portugal , Vol. , pp. 207 - 214 , September, 2005.


Phase Unwrapping Via Graph Cuts. G. Valadão and J. Bioucas-Dias, Proc. EARSEL Symp., Porto, Portugal, Vol. 1, pp. 222 - 242, June, 2005.


Subsidências Para a Região de Lisboa por PSInSAR: Análise Preliminar de Resultados. G. Valadão, J. Matos, C. Oliveira, J. Fonseca, M. Santos, F. Novali, Proc. Conf. Nacional de Cartografia e Geodesia, Lisboa, Portugal, Vol. 1, pp. 378 - 383, April,