4.6k citations · 6.6k across the 56 of their papers we have counts for
4 papers · 2 filters
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…
Eigendecomposition-Free Sampling Set Selection for Graph Signals
Akie Sakiyama, Yuichi Tanaka, Toshihisa Tanaka +1
This paper addresses the problem of selecting an optimal sampling set for signals on graphs. The proposed sampling set selection (SSS) is based on a localization operator that can…
Two-Channel Critically-Sampled Graph Filter Banks With Spectral Domain Sampling
Akie Sakiyama, Kana Watanabe, Yuichi Tanaka +1
We propose two-channel critically-sampled filter banks for signals on undirected graphs that utilize spectral domain sampling. Unlike conventional approaches based on vertex domain…
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…