Compact Early Vision Signal Analyzers in Neuromorphic Technology

Valentina Baruzzi, Giacomo Indiveri, Silvio P. Sabatini

2020

Abstract

Reproducing the dynamics of biological neural systems using mixed signal analog/digital neuromorphic circuits makes these systems ideal platforms to implement low-power bio-inspired devices for a wide range of application domains. Despite these principled assets, neuromorphic system design has to cope with the limited resources presently available on hardware. Here, different spiking networks were designed, tested in simulation, and implemented on the neuromorphic processor DYNAP-SE, to obtain silicon neurons that are tuned to visual stimuli oriented at specific angles and with specific spatial frequencies, provided by the event camera DVS. Recurrent clustered inhibition was successfully tested on spiking neural networks, both in simulation and on the DYNAP-SE board, to obtain neurons with highly structured Gabor-like receptive fields (RFs); these neurons are characterized by tuning curves that are sharper or at least comparable to the ones obtained using equivalent feed-forward schemes, but require a significantly lower number of synapses. The resulting harmonic signal description provided by the proposed neuromorphic circuit could be potentially used for a complete characterization of the 2D local structure of the visual signal in terms of phase relationships from all the available oriented channels.

Paper Citation

in Harvard Style

Baruzzi V., Indiveri G. and Sabatini S. (2020). Compact Early Vision Signal Analyzers in Neuromorphic Technology. In Proceedings of the 15th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (VISIGRAPP 2020) - Volume 4: VISAPP; ISBN 978-989-758-402-2, SciTePress, pages 530-537. DOI: 10.5220/0009171205300537

in Bibtex Style

@conference{visapp20,
author={Valentina Baruzzi and Giacomo Indiveri and Silvio P. Sabatini},
title={Compact Early Vision Signal Analyzers in Neuromorphic Technology},
booktitle={Proceedings of the 15th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (VISIGRAPP 2020) - Volume 4: VISAPP},
year={2020},
pages={530-537},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0009171205300537},
isbn={978-989-758-402-2},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 15th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (VISIGRAPP 2020) - Volume 4: VISAPP
TI - Compact Early Vision Signal Analyzers in Neuromorphic Technology
SN - 978-989-758-402-2
AU - Baruzzi V.
AU - Indiveri G.
AU - Sabatini S.
PY - 2020
SP - 530
EP - 537
DO - 10.5220/0009171205300537
PB - SciTePress