Search Results for author: Gregory Cohen

Found 10 papers, 4 papers with code

An Optimized Deep Spiking Neural Network Architecture Without Gradients

1 code implementation IEEE Access 2022 Yeshwanth Bethi, Ying Xu, Gregory Cohen, André van Schaik, and Saeed Afshar

Through the use of simple local adaptive selection thresholds at each node, the network rapidly learns to appropriately allocate its neuronal resources at each layer for any given problem without using an error measure.

An optimised deep spiking neural network architecture without gradients

no code implementations27 Sep 2021 Yeshwanth Bethi, Ying Xu, Gregory Cohen, Andre van Schaik, Saeed Afshar

Through the use of simple local adaptive selection thresholds at each node, the network rapidly learns to appropriately allocate its neuronal resources at each layer for any given problem without using a real-valued error measure.

Event-based Object Detection and Tracking for Space Situational Awareness

no code implementations20 Nov 2019 Saeed Afshar, Andrew P Nicholson, Andre van Schaik, Gregory Cohen

In this work, we present optical space imaging using an unconventional yet promising class of imaging devices known as neuromorphic event-based sensors.

object-detection Object Detection

Event-based Feature Extraction Using Adaptive Selection Thresholds

no code implementations18 Jul 2019 Saeed Afshar, Ying Xu, Jonathan Tapson, André van Schaik, Gregory Cohen

A novel heuristic method for network size selection is proposed which makes use of noise events and their feature representations.

Benchmarking

Investigation of event-based memory surfaces for high-speed tracking, unsupervised feature extraction and object recognition

no code implementations14 Mar 2016 Saeed Afshar, Gregory Cohen, Tara Julia Hamilton, Jonathan Tapson, Andre van Schaik

This variance motivated the investigation of event-based decaying memory surfaces in comparison to time-based decaying memory surfaces to capture the temporal aspect of the event-based data.

Object Recognition

An Online Learning Algorithm for Neuromorphic Hardware Implementation

no code implementations11 May 2015 Chetan Singh Thakur, Runchun Wang, Saeed Afshar, Gregory Cohen, Tara Julia Hamilton, Jonathan Tapson, Andre van Schaik

We propose a sign-based online learning (SOL) algorithm for a neuromorphic hardware framework called Trainable Analogue Block (TAB).

regression

The Ripple Pond: Enabling Spiking Networks to See

no code implementations13 Jun 2013 Saeed Afshar, Gregory Cohen, Runchun Wang, Andre van Schaik, Jonathan Tapson, Torsten Lehmann, Tara Julia Hamilton

In this paper we present the biologically inspired Ripple Pond Network (RPN), a simply connected spiking neural network that, operating together with recently proposed PolyChronous Networks (PCN), enables rapid, unsupervised, scale and rotation invariant object recognition using efficient spatio-temporal spike coding.

Object Recognition

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