Event-based computation: unsupervised elementary motion decomposition

Bogdan, Petrut, Pineda Garcia, Garibaldi, Davidson, Simon, Hopkins, Michael, James, Robert and Furber, Steve (2019) Event-based computation: unsupervised elementary motion decomposition. 2019 EMerging Technology Conference (EMiT), Huddersfield, UK, 9-11 April 2019. Published in: Bane, M K and Homes, V, (eds.) Proceedings of the 2019 Emerging Technology Conference. 20-23. EMiT/University of Huddersfield/High End Compute Ltd/University of Manchester ISBN 978-0-9933426-4-6

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Fast, localised motion detection is crucial for an efficient attention mechanism. We show that modelling a network capable of such motion detection can be performed using spiking neural networks simulated on many-core neuromorphic hard-ware. Moreover, highly sensitive neurons arise from the presented network architecture through unsupervised self-organisation. We use a synaptic rewiring rule which has been shown to enable the formation and refinement of neural topographic maps. Our extension allows newly formed synapses to be initialised with a delay drawn from a uniform distribution. Repeated exposure to moving bars enables neurons to be sensitised to a preferred direction of movement. Incorporating heterogeneous delays results in more sensitive neural responses. A readout mechanism involving a neuron for each learnt motion is sufficient to establish the input stimulus class.

Item Type: Conference Proceedings
Keywords: SpiNNaker, Neuromorphic computing, Spiking Neural Network, structural plasticity, synaptic rewiring, topographic maps
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Research Centres and Groups: Centre for Computational Neuroscience and Robotics
Subjects: Q Science > QA Mathematics > QA0075 Electronic computers. Computer science > QA0076.8.A-Z Special computers, computer systems, and microprocessors. By name, A-Z
Q Science > QA Mathematics > QA0075 Electronic computers. Computer science
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Depositing User: Garibaldi Pineda Garcia
Date Deposited: 08 Oct 2019 08:42
Last Modified: 08 Oct 2019 11:31
URI: http://sro.sussex.ac.uk/id/eprint/80938

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Project NameSussex Project NumberFunderFunder Ref
Human Brain Project Specific Grant Agreement 2 � HBP SGA2G2410EUROPEAN UNION785907