2 citations · 2 across the 2 of their papers we have counts for
6 papers · 1 filter
Spectral folding and two-channel filter-banks on arbitrary graphs
Eduardo Pavez, Benjamin Girault, Antonio Ortega +1
In the past decade, several multi-resolution representation theories for graph signals have been proposed. Bipartite filter-banks stand out as the most natural extension of time do…
TILES-2018, a longitudinal physiologic and behavioral data set of hospital workers
Karel Mundnich, Brandon M. Booth, Michelle L'Hommedieu +11
We present a novel longitudinal multimodal corpus of physiological and behavioral data collected from direct clinical providers in a hospital workplace. We designed the study to in…
Graph Vertex Sampling with Arbitrary Graph Signal Hilbert Spaces
Benjamin Girault, Antonio Ortega, Shrikanth S. Narayayan
Graph vertex sampling set selection aims at selecting a set of ver-tices of a graph such that the space of graph signals that can be reconstructed exactly from those samples alone…
What's in a frequency: new tools for graph Fourier Transform visualization
Benjamin Girault, Antonio Ortega
Recent progress in graph signal processing (GSP) has addressed a number of problems, including sampling and filtering. Proposed methods have focused on generic graphs and defined s…
Graph Variogram: A novel tool to measure spatial stationarity
Alexander Serrano, Benjamin Girault, Antonio Ortega
Irregularly sampling a spatially stationary random field does not yield a graph stationary signal in general. Based on this observation, we build a definition of graph stationarity…
Irregularity-Aware Graph Fourier Transforms
Benjamin Girault, Antonio Ortega, Shrikanth Narayanan
In this paper, we present a novel generalization of the graph Fourier transform (GFT). Our approach is based on separately considering the definitions of signal energy and signal v…