Scope
The main barrier that researchers face when trying to mimic the bio-inspired systems is the massive connectivity present in the biological like systems. In today technologies it is plausible to fabricate on a single chip many thousands (even millions) of artificial neurons or simple processing cells. However, it is not viable to connect physically each of them to even a few hundreds of other neurons. The problem is greater for multi-chip multi-layer hierarchically structured bio-inspired systems. Address-event representation (AER) is a promising emergent hardware technology that shows potential for providing the computing requirements of large frameless projection-field-based multilayer systems providing a hardware solution to the massive connectivity problems.
An event-driven simulator tool has been implemented and it is called AERST (Address Event Representation Simulator Tool). The tool is aimed at simulating systems where event-times can be computed efficiently. The simulator tool is easy to handle, and it allows. The tool is intended to not only consider the existing biological models for neurons and their learning strategies, but also the limitations (timing, space, connectivity, etc) and performance figures of those existing hardware elements which also try to emulate the complex bioinspired processing strategies. The tool has been validated comparing simulated results with results obtained using AER hardware devices.
Several systems have been implemented and simulated so far. These are:
1. A multi-layer feed-forward neural processing system for character recognition in AER.
2. A four-layer system implementing texture retrieval for image classification.
5. A neural network consisting of six layers trained using the back-propagation algorithm to detect people in three different positions: up, horizontal and up-side-down.
Collaborations
School of Computer Science, University of Manchester- MANCHESTER, UK
Centre de Recherche Cerveau et Cognition (CERCO)
Microelectronic Institute of Seville, (IMSE-CNM-CSIC), SEVILLE, SPAIN
Funding
“Brain System”, Proyecto Excelencia, Junta de Andalucía.
Images
Publications
- Journal Papers
J. A. Pérez-Carrasco, B. Acha, C. Serrano, L. Camuñas-Mesa, T. Serrano-Gotarredona, and B. Linares-Barranco, “Fast Vision through Frame-less Event-based Sensing and convolutional Processing. Application to Texture Recognition,” IEEE Trans. Neural Networks, vol. 21, No. 4, pp. 609-620, April 2010.
R. Serrano-Gotarredona, T. Serrano-Gotarredona, A. Acosta-Jiménez, C. Serrano-Gotarredona, J. A. Pérez-Carrasco, A. Linares-Barranco, G. Jimenez-Moreno, A. Civit-Ballcels, and B. Linares-Barranco, \On Real-Time AER 2D Convolutions Hardware for Neuromorphic Spike Based Cortical Processing,” IEEE Trans. Neural Networks, vol. 19, No. 7, pp. 1196-1219, July 2008.
J. A. Pérez-Carrasco, C. Serrano, B. Acha, T. Serrano-Gortarredona, and B. Linares-Barranco, “Mapping from Frame-Driven to Frame-Free Event-Driven Vision Systems by Low-Rate Rate-Coding. Application to Feed Forward ConvNets”, submitted to IEEE Pattern Analysis and Machine Intelligence (PAMI).
- Conference Proceedings
J. A. Pérez-Carrasco, C. Serrano, B. Acha, T. Serrano-Gotarredona, B. Linares-Barranco, “Spike-Based Convolutional Network for real-time processing”, 20th International Conference on Pattern Recognition (ICPR 2010), pp.3085-3088, Istanbul, Turkey, 2010.
J. A. Pérez-Carrasco, C. Zamarreño-Ramos, L. Camuñas-Mesa, T. Serrano-Gotarredona, and B. Linares-Barranco, “On Neuromorphic Spiking Architectures for Asynchronous STDP Menristive Systems”,. IEEE International Symposium on Circuits and Systems (ISCAS 2010), Paris, France, 2010.
L. Camuñas-Mesa, J. A. Pérez-Carrasco, C. Zamarreño-Ramos, T. Serrano-Gotarredona, and B. Linares-Barranco, “On Scalable Spiking ConvNet Hardware for Cortex-Like Visual Sensory Processing Systems”, IEEE International Symposium on Circuits and Systems (ISCAS 2010), Paris, France, 2010.
S. Thorpe, A. Brilhault, J. A. Pérez-Carrasco, “Suggestions for a Biologically Inspired Spiking Retina Using Order-Based Coding”, IEEE International Symposium on Circuits and Systems (ISCAS 2010), Pars, Francia, 2010.
L. Camuñas-Mesa, J. A. Pérez-Carrasco, C. Zamarreño-Ramos, T. Serrano-Gotarredona, and B. Linares-Barranco, “Neocortical Frame-free Vision Sensing and Processing through Scalable Spiking ConvNet Hardware”, 2010 IEEE World Congress on Computational Intelligence, Barcelona, Spain, 2010.
J. A. Pérez Carrasco, C. Serrano, B. Acha, T. Serrano-Gotarredona, B. Linares-Barranco, “Advanced Vision Processing Systems: Spike-Based Simulation and Processing”, Advanced Concepts for Intelligent Vision Systems (ACIVS 2009), pp. 640-651, Bordeaux, France, 2009.
J. A. Pérez-Carrasco, C. Serrano, B. Acha, T. Serrano-Gotarredona, B. Linares-Barranco, “Simulación de Sistemas Basados en Eventos”, XXIV Simposium Nacional de la Union Científica Internacional de Radio (URSI 2009), Santander, Septiembre 2009.
J. A. Pérez-Carrasco, C. Serrano, B. Acha, T. Serrano-Gotarredona, B. Linares-Barranco, “Procesamiento rápido de visión basado en AER”, XXIV Simposium Nacional de la Unión Científica Internacional de Radio (URSI 2009), Santander, Septiembre 2009.
J. A. Pérez-Carrasco, B. Acha, C. Serrano, “Calibración colorimétrica para el diagnóstico automático de quemaduras”, XXIV Simposium Nacional de la Unión Científica Internacional de Radio (URSI 2009), Santander, Septiembre 2009.
J. A. Pérez-Carrasco, C. Serrano, B. Acha, “Clasificación de Lesiones de Piel Basada en Filtros de Gabor y Color”, Congreso Anual de la Sociedad Espaola de Ingeniería Biomédica (CASEIB 2009), Num. 27, pp.125-128, Cadiz, Spain, 2009.
J.A. Pérez-Carrasco, T. Serrano-Gotarredona, C. Serrano-Gotarredona, B. Acha, B. Linares-Barranco. “High-Speed Character Recognition System Based on a Complex Hierarchical Aer Architecture”, High-Speed Character Recognition System Based on a Complex Hierarchical Aer Architecture. IEEE International Symposium on Circuits and Systems. Seattle, EE.UU. IEEE. Pag. 2150-2153 (ISCAS 2008). Seattle. Washington, USA, 18-21 May 2008.
J.A. Pérez-Carrasco, C. Serrano, B. Acha, T. Serrano-Gotarredona, B. Linares-Barranco, “Event Based Vision Sensing and Processing”, Proceedings of the 15th IEEE International Conference on Image Processing (ICIP 2008). pp: 1392-1395. San Diego, California, USA, 12-15 October 2008.
J. A. Pérez-Carrasco, C. Serrano, B. Acha, T. Serrano-Gotarredona, B. Linares-Barranco, “Simulador de Sistemas AER Basado en Eventos”, XXIII Simposium Nacional de la Unión Científica Internacional de Radio (URSI 2008), Madrid, Spain, Septiembre 2008.
J. A. Pérez Carrasco, T. Serrano Gotarredona, C. Serrano, B. Acha, B. Linares Barranco, “On the Computational Power of Address-Event Representation (Aer) Vision Processing Hardware”, DCIS 2007, pp. 21-23, Sevilla, Spain, 2007.
