April 18th - Afonso Teodoro

Afonso Teodoro (IST/IT)

Tackling Inverse Problems in Imaging Using Targeted Priors


Image denoising is one of the core problems in image processing and some argue that current state-of-the-art general purpose methods may be reaching the maximum possible performance. This talk focuses on two main topics: 1) how can we push such limit; 2) how to leverage the developments in image denoising to tackle other inverse imaging problems. In the former, we propose learning priors that are adapted to specific classes of images, such as documents and face images, or to specific tasks. In the latter, we build upon the recently proposed plug-and-play framework, by plugging a state-of-the-art denoiser into the iterations of an alternating direction method of multipliers algorithm.


Bio: Afonso Teodoro received the MSc degree in Electrical and Computer Engineering from Instituto Superior Técnico, University of Lisbon, in 2014. In his MSc thesis, he focused on addressing image denoising and inpainting problems, using a patch-based Gaussian mixture model. Since then, he has continued working on other image restoration/reconstruction topics, such as image deblurring, super-resolution, hyperspectral sharpening, among others, at Instituto de Telecomunicações, where he is pursuing his PhD degree. His research interests include signal and image processing, optimization, deep learning, artificial intelligence, and robotics.