177 citations · 551 across the 17 of their papers we have counts for
4 papers · 1 filter
Sampling of graph signals via randomized local aggregations
Diego Valsesia, Giulia Fracastoro, Enrico Magli
Sampling of signals defined over the nodes of a graph is one of the crucial problems in graph signal processing. While in classical signal processing sampling is a well defined ope…
Graph Transform Optimization with Application to Image Compression
Giulia Fracastoro, Dorina Thanou, Pascal Frossard
In this paper, we propose a new graph-based transform and illustrate its potential application to signal compression. Our approach relies on the careful design of a graph that opti…
Steerable Discrete Fourier Transform
Giulia Fracastoro, Enrico Magli
Directional transforms have recently raised a lot of interest thanks to their numerous applications in signal compression and analysis. In this letter, we introduce a generalizatio…
Steerable Discrete Cosine Transform
Giulia Fracastoro, Sophie Marie Fosson, Enrico Magli
In image compression, classical block-based separable transforms tend to be inefficient when image blocks contain arbitrarily shaped discontinuities. For this reason, transforms in…