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GRASP: Graph Alignment through Spectral Signatures [article]

Judith Hermanns, Anton Tsitsulin, Marina Munkhoeva, Alex Bronstein, Davide Mottin, Panagiotis Karras
2021 arXiv   pre-print
Our experimental study, featuring noise levels higher than anything used in previous studies, shows that GRASP outperforms state-of-the-art methods for graph alignment across noise levels and graph types  ...  What is the best way to match the nodes of two graphs? This graph alignment problem generalizes graph isomorphism and arises in applications from social network analysis to bioinformatics.  ...  We propose GRASP, short for GRaph Alignment through SPectral Signatures, a principled approach towards detecting a good alignment among graphs, grounded on their spectral characteristics, i.e., eigenvalues  ... 
arXiv:2106.05729v2 fatcat:gjn3jf3ivjgk7gzfbnm4tai6wa

Rhythmic Oscillations of Visual Contrast Sensitivity Synchronized with Action

A. Tomassini, D. Spinelli, M. Jacono, G. Sandini, M. C. Morrone
2015 Journal of Neuroscience  
When the data are temporally aligned to the onset of movement, visual contrast sensitivity oscillates with periodicity within the theta band.  ...  peaks for the performance aligned on sound presentation time (bottom right graph).  ...  oscillatory components for the performance aligned on the start of the trial (bottom right graph).  ... 
doi:10.1523/jneurosci.4568-14.2015 pmid:25948254 pmcid:PMC4888952 fatcat:ltkl5l3i7bcabo7xxdm7zkfmwa

A Graph Signal Processing View on Functional Brain Imaging [article]

Weiyu Huang, Thomas A. W. Bolton, John D. Medaglia, Danielle S. Bassett, Alejandro Ribeiro, Dimitri Van De Ville
2018 arXiv   pre-print
We review how brain activity can be meaningfully filtered based on concepts of spectral modes derived from brain structure.  ...  Graph signal processing (GSP) is an emerging area of research where signals recorded at the nodes of the graph are studied atop the underlying graph structure.  ...  (B) Through the eigendecomposition of the Laplacian (left plot) or adjacency (right plot) matrix, this structural graph can be analyzed in the spectral domain.  ... 
arXiv:1710.01135v3 fatcat:35ml6ug5gvan3bdfi4mtbvisky

Encoding of grasping movements in the anterior intraparietal area of macaques

Markus Andreas Baumann
Des weiteren untersuchten wir die Kodierungseigenschaften des Lokalen Feldpotentials (LFP) während des 'delayed grasping task'.  ...  Wir benutzten einen 'delayed grasping task', in welchem die Phase visueller Instruktionen zeitlich klar von der Ausführung der Bewegung getrennt war.  ...  The color code shows the logarithm of the spectral energy of a given frequency (y-axis) at a given time in the trial (x-axis). Trials were double aligned as inFigure 3-1.  ... 
doi:10.5167/uzh-31938 fatcat:wmdgpf27kfdcdicqrrfiegdxku

Quantification and analysis of hand grasp dynamicsand arm reaching kinematics following hemiparesisusing a novel assistive robotics approach

Nam-Hun Kim
The Gripper The Gripper was developed to detect direct hand grasping force signature ( Figure 11 ).  ...  The relationship between APRT and grasp force control was defined through many normal subjects and established as a power function.  ... 
doi:10.7282/t36110s0 fatcat:s6e2s5mbevhy5hupr7ttfbl2gi

Persistence and change: Local and global components of metre induction using Inner Metric Analysis

Anja Volk (née Fleischer)
2008 Journal of Mathematics and Music - Mathematical and Computational Approaches to Music Theory, Analysis, Composition and Performance  
weight profile in the lower graph of Figure 4 mixes these different characteristics by assigning great weights on the first and third beats through the entire segment.  ...  Figure 17 shows his alignment of bars 4-9 with 9-4' and Figure 18 his alignment of bars 4-9 with 15-20.  ...  Without the influence of the second main section, the spectral weight profile of the first main section in Figure 14 reveals a highest layer built upon the weight of each 3 8 bar.  ... 
doi:10.1080/17459730802312399 fatcat:ct6zr4tvprf5ra7c7safu3g2wq

Incremental and multimodal visualization of discographies: exploring the WASABI music knowledge base

Aline Menin, Michel Buffa, Maroua Tikat, Benjamin Molinet, Guillaume Pellerin, Laurent Pottier, Franck Michel, Marco Winckler
2022 Zenodo  
We designed a web platform that requests metadata of any artist/band, parses the results, and displays the data through a visualization technique that combines stream-graphs, timelines and network representation  ...  We demonstrate the use and feasibility of our method through a series of usage scenarios and validate its usefulness through expert judgment.  ...  Through this visualization, the user can grasp rapidly when an artist was the most productive and what type of musical production they did.  ... 
doi:10.5281/zenodo.6767529 fatcat:6gzkizvszrdwxb5hnna5w67xbm

Spectral mesh processing

Bruno Lévy, Hao (Richard) Zhang
2010 ACM SIGGRAPH 2010 Courses on - SIGGRAPH '10  
Other methods that use spectral graph theory to compute graph embeddings are reviewed in [Kor02] . Spectral graph theory can also be used to compute topological invariants (e.g.  ...  A survey of spectral geometry compression and its links with graph partitioning is given in [Got03] . Spectral graph theory also enables to exhibit ways of defining valid graph embeddings.  ... 
doi:10.1145/1837101.1837109 dblp:conf/siggraph/LevyZ10 fatcat:o2vdjdhr7vbg7pft2spbd5v72y

Spectral mesh processing

Bruno Lévy, Hao (Richard) Zhang
2009 ACM SIGGRAPH ASIA 2009 Courses on - SIGGRAPH ASIA '09  
Other methods that use spectral graph theory to compute graph embeddings are reviewed in [Kor02] . Spectral graph theory can also be used to compute topological invariants (e.g.  ...  A survey of spectral geometry compression and its links with graph partitioning is given in [Got03] . Spectral graph theory also enables to exhibit ways of defining valid graph embeddings.  ... 
doi:10.1145/1665817.1665834 dblp:conf/siggraph/LevyZ09 fatcat:3owm6apojnb5bi35prxd7mixj4

Graspability Modulates the Stronger Electroencephalography Signature of Motor Preparation for Real Objects vs. Pictures

Grant T. Fairchild, Francesco Marini, Jacqueline C. Snow
2021 Journal of Cognitive Neuroscience  
In human dorsal cortex, electroencephalography responses show a "real object advantage" in the strength and duration of mu (μ) and low beta (β) rhythm desynchronization—well-known neural signatures of  ...  Event-related Spectral Perturbation Power Analysis The power of the event-related spectral perturbation (ERSP; Makeig, 1993) was computed using Morlet wavelets as implemented in the EEGLAB function newtimef  ...  The aperture within this frame, through which stimuli were visible, measured 20.8 in. in height and 13.9 in. in width.  ... 
doi:10.1162/jocn_a_01771 pmid:34407193 fatcat:fsqcdttabnhx3l3emwm2gz2rbm

BioSense/SR-BioSpectra demonstrations of wide area/early warning for bioaerosol threats: program description and early test and evaluation results

Jean-Robert Simard, Sylvie Buteau, Pierre Lahaie, Pierre Mathieu, Gilles Roy, Denis Nadeau, John McFee, Jim Ho, Susan Rowsell, Nicolas Ho, François Babin, Daniel Cantin (+12 others)
2011 Optics and Photonics for Counterterrorism and Crime Fighting VII; Optical Materials in Defence Systems Technology VIII; and Quantum-Physics-based Information Security  
Second, the lidar-adapted and the benchtop bioaerosol LIF chambers (BSL1), developed to challenge the constructed detection systems and to accelerate the population of the library of spectral LIF properties  ...  Defence Research and Development Canada (DRDC) and the Chemical, Biological, Radiological-Nuclear, and Explosives Research and Technology Initiative (CRTI) have supported two major demonstrations based on spectrally  ...  bacteria have all distinct and repeatable spectral signatures.  ... 
doi:10.1117/12.894631 fatcat:g25eezzwkjbwnjvfmaopuh2s7i

How to separate containers from non-containers? a behavior-grounded approach to acoustic object categorization

Shane Griffith, Jivko Sinapov, Vladimir Sukhoy, Alexander Stoytchev
2010 2010 IEEE International Conference on Robotics and Automation  
The robot used six exploratory behaviors (drop block, grasp, move, shake, flip, and drop object) and applied them to twenty objects.  ...  This paper describes an approach to interactive object categorization that couples exploratory behaviors and their resulting acoustic signatures to form object categories.  ...  The spectral clustering algorithm exploits the eigenstructure of the matrix to partition the data points. Finding the optimal graph partition is an NP-complete problem.  ... 
doi:10.1109/robot.2010.5509443 dblp:conf/icra/GriffithSSS10 fatcat:eeikr6cgordtfej363wyuuikza

A Literature Review: Geometric Methods and Their Applications in Human-Related Analysis

Wenjuan Gong, Bin Zhang, Chaoqi Wang, Hanbing Yue, Chuantao Li, Linjie Xing, Yu Qiao, Weishan Zhang, Faming Gong
2019 Sensors  
Heat kernel signature (HKS), wave kernel signature (WKS), and learned spectral descriptors for point matching between human models.  ...  Dark Heat kernel signature (HKS), wave kernel signature (WKS), and learned spectral descriptors for point matching between human models.  ... 
doi:10.3390/s19122809 fatcat:nrnq4vrj7bfv7iv4aem5g6k4zu

Gravitate Project D3.1 Report On Shape Analysis And Matching And On Semantic Matching

Silvia Biasotti, Andrea Cerri, Chiara Catalano E., Bianca Falcidieno, Maria Laura Torrente, Stuart Middleton E., Leo Dorst, Ilan Shimshoni, Ayellet Tal, Dominic Oldman
2016 Zenodo  
to include (a) improving semantic mapping through semi-automatic machine learning and (b) integrating domain knowledge into alignment techniques.  ...  Recent examples include (Escolano 2011) using graphs represented as a bag of partial node coverages using spectral features and (Duchenne 2011) using spectral features in hypergraphs.  ... 
doi:10.5281/zenodo.55432 fatcat:tc3rsykiufezxeper7ldew2ibu

Irregularity-Aware Graph Fourier Transforms

Benjamin Girault, Antonio Ortega, Shrikanth Narayanan
2018 IEEE Transactions on Signal Processing  
In this paper, we present a novel generalization of the graph Fourier transform (GFT).  ...  Our approach includes traditional definitions of the GFT as special cases, while also leading to new GFT designs that are better at taking into account the irregular nature of the graph.  ...  All experiments were performed using the GraSP toolbox for Matlab [32] . A.  ... 
doi:10.1109/tsp.2018.2870386 fatcat:xq3t5l6c5jf4jp333lwyol7ewu
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