Search Results for author: Jonathan Tapson

Found 20 papers, 3 papers with code

Biologically-inspired Salience Affected Artificial Neural Network (SANN)

1 code implementation9 Aug 2019 Leendert A Remmelzwaal, George F R Ellis, Jonathan Tapson, Amit K Mishra

In this paper we introduce a novel Salience Affected Artificial Neural Network (SANN) that models the way neuromodulators such as dopamine and noradrenaline affect neural dynamics in the human brain by being distributed diffusely through neocortical regions, allowing both salience signals to modulate cognition immediately, and one time learning to take place through strengthening entire patterns of activation at one go.

General Classification

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

A Stochastic Approach to STDP

no code implementations13 Mar 2016 Runchun Wang, Chetan Singh Thakur, Tara Julia Hamilton, Jonathan Tapson, André van Schaik

The decay generator will then generate an exponential decay, which will be used by the STDP adaptor to perform the weight adaption.

8k

A compact aVLSI conductance-based silicon neuron

no code implementations3 Sep 2015 Runchun Wang, Chetan Singh Thakur, Tara Julia Hamilton, Jonathan Tapson, Andre van Schaik

We present an analogue Very Large Scale Integration (aVLSI) implementation that uses first-order lowpass filters to implement a conductance-based silicon neuron for high-speed neuromorphic systems.

A neuromorphic hardware architecture using the Neural Engineering Framework for pattern recognition

1 code implementation21 Jul 2015 Runchun Wang, Chetan Singh Thakur, Tara Julia Hamilton, Jonathan Tapson, Andre van Schaik

The architecture is not limited to handwriting recognition, but is generally applicable as an extremely fast pattern recognition processor for various kinds of patterns such as speech and images.

Handwriting Recognition Handwritten Digit Recognition

A Trainable Neuromorphic Integrated Circuit that Exploits Device Mismatch

no code implementations10 Jul 2015 Chetan Singh Thakur, Runchun Wang, Tara Julia Hamilton, Jonathan Tapson, Andre van Schaik

Additionally, we characterise each neuron and discuss the statistical variability of its tuning curve that arises due to random device mismatch, a desirable property for the learning capability of the TAB.

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

A neuromorphic hardware framework based on population coding

no code implementations2 Mar 2015 Chetan Singh Thakur, Tara Julia Hamilton, Runchun Wang, Jonathan Tapson, André van Schaik

These neuronal populations are characterised by a diverse distribution of tuning curves, ensuring that the entire range of input stimuli is encoded.

FPGA Implementation of the CAR Model of the Cochlea

no code implementations2 Mar 2015 Chetan Singh Thakur, Tara Julia Hamilton, Jonathan Tapson, Richard F. Lyon, André van Schaik

Here, we implement the Cascade of Asymmetric Resonators (CAR) model of the cochlea on an FPGA.

Fast, simple and accurate handwritten digit classification by training shallow neural network classifiers with the 'extreme learning machine' algorithm

no code implementations29 Dec 2014 Mark D. McDonnell, Migel D. Tissera, Tony Vladusich, André van Schaik, Jonathan Tapson

Our close to state-of-the-art results for MNIST and NORB suggest that the ease of use and accuracy of the ELM algorithm for designing a single-hidden-layer neural network classifier should cause it to be given greater consideration either as a standalone method for simpler problems, or as the final classification stage in deep neural networks applied to more difficult problems.

General Classification speech-recognition +1

Turn Down that Noise: Synaptic Encoding of Afferent SNR in a Single Spiking Neuron

no code implementations11 Nov 2014 Saeed Afshar, Libin George, Jonathan Tapson, Andre van Schaik, Philip de Chazal, Tara Julia Hamilton

We have added a simplified neuromorphic model of Spike Time Dependent Plasticity (STDP) to the Synapto-dendritic Kernel Adapting Neuron (SKAN).

Racing to Learn: Statistical Inference and Learning in a Single Spiking Neuron with Adaptive Kernels

no code implementations6 Aug 2014 Saeed Afshar, Libin George, Jonathan Tapson, Andre van Schaik, Tara Julia Hamilton

This paper describes the Synapto-dendritic Kernel Adapting Neuron (SKAN), a simple spiking neuron model that performs statistical inference and unsupervised learning of spatiotemporal spike patterns.

Learning ELM network weights using linear discriminant analysis

no code implementations12 Jun 2014 Philip de Chazal, Jonathan Tapson, André van Schaik

We present an alternative to the pseudo-inverse method for determining the hidden to output weight values for Extreme Learning Machines performing classification tasks.

General Classification

Explicit Computation of Input Weights in Extreme Learning Machines

no code implementations11 Jun 2014 Jonathan Tapson, Philip de Chazal, André van Schaik

In the absence of supervised training for the input weights, random linear combinations of training data samples are used to project the input data to a higher dimensional hidden layer.

ELM Solutions for Event-Based Systems

no code implementations30 May 2014 Jonathan Tapson, André van Schaik

The modifications involve the re-definition of hidden layer units as synaptic kernels, in which the input delta functions are transformed into continuous-valued signals using a variety of impulse-response functions.

Online and Adaptive Pseudoinverse Solutions for ELM Weights

no code implementations30 May 2014 André van Schaik, Jonathan Tapson

The ELM method has become widely used for classification and regressions problems as a result of its accuracy, simplicity and ease of use.

General Classification

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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