Maria-Jose Escobar

A bio-inspired V1 and MT model working in an analog way: each V1 and MT neurons are modeled as conductance based integrate and fire neurons. We also propose in MT different center-surround interactions varying the shape of the surrounds, these different configurations code different aspects of motion analysis.

Main contribution:

Escobar M.J., Kornprobst P. (2008). Action Recognition with a Bio-Inspired Feedforward Motion Processing Model:The Richness of Center-Surround Interactions. Computer Vision - ECCV, Lecture Notes in Computer Science, pages 186-199 (link)

A bio-inspired V1 and MT model working in a fully spiking model: our MT layer receives spiking inputs coming from a previous spiking V1 layer. MT layer integrates this information to produce spikes as output. In this configuration we also tried different center-surround interactions in MT cells, but now the focus is the role of integrative and inhibitory surrounds. The Human Action Recognition task was also used to validate this model. Using the spike trains output of MT cells we propose two different methods to interpret the information here contained, one using the mean firing rate of the spike trains and one using synchrony between those spike trains.

Main contribution:

Escobar M.J., Masson G.S., Vieville T. and Kornprobst P. (2009).Action Recognition Using a Bio-Inspired Feedforward Spiking Network. International Journal of Computer Vision, Volume 82, Number 3, pages 284-301 (link)

Study of cell's dynamics for the aperture problem solution: Work done in collaboration with G. S. Masson (INCM/CNRS Marseille), which consists in try to explain, through different cell's connectivity within and between different brain areas, the solution of the aperture problem seen in real cell's measurements, visual perception and in ocular following recordings (OFR). A simple model was already published in Neurocomp 2008 (link). Now, as last part of my thesis we are proposing a neural mass model as formalization of the previous work done for Neurocomp 2008. I am currently working on this and the results have not been published.

Main contribution:

Escobar M.J., Masson G.S., Kornprobst P. and Vieville T. (2008). A Simple Mechanism to Reproduce the Neural Solution of the Aperture Problem in monkey Area MT. Neurocomp 2008

If you are interested, click here to download my thesis.

Publications

Escobar M.J., Masson G.S., Vieville T. and Kornprobst P. (2009). Action Recognition Using a Bio-Inspired Feedforward Spiking Network. International Journal of Computer Vision, Volume 82, Number 3, pages 284-301 (link)

Escobar M.J., Kornprobst P. (2008). Action Recognition with a Bio-Inspired Feedforward Motion Processing Model:The Richness of Center-Surround Interactions. Computer Vision - ECCV, Lecture Notes in Computer Science, pages 186-199 (link)

Escobar M.J., Masson G.S., Kornprobst P. and Vieville T. (2008). Rate Versus Synchrony Code for Human Action Recognition. Research Report RR-6669, INRIA

Escobar M.J., Masson G.S. and Kornprobst P. (2008). A Simple Mechanism to Reproduce the Neural Solution of the Aperture Problem in monkey Area MT. Neurocomp 2008

Escobar M.J., Masson G.S., Kornprobst P. and Vieville T. (2007). Spike to spike model and applications: A biological plausible approach for motion processing. Research Report RR-6280, INRIA

Escobar M.J., Wohrer A., Kornprobst P. and Viéville T. (2006).Biological Motion Recognition Using a MT-like Model. Neurocomp 2006 .LARS 2006

Escobar M.J. and Ruiz-del-Solar J. (2002). Biologically-based Face Recognition using Gabor Filters and Log-Polar Images. Proceedings of IJCNN 2002

Escobar M.J., Ruiz-del-Solar J. and Rodriguez J. (2002). Face Recognition Using Multi Log Polar Images and Gabor Filters. Advances in Soft Computing - Engineering, Design and Manufacturing, J. Benitez and F. Hoffmann (Eds.), Springer Engineering Series (in press), 2003. ISBN:1852337559

Escobar M.J. and Ruiz-del-Solar, J. (2002). Reconocimiento de Caras Inspirado en Modelos Biológicos. Anales del Instituto de Ingenieros de Chile. Vol. 114, No. 1, pp. 19-27.

Navarrete, P., Ruiz-del-Solar, J., and Escobar, M.J. (2001). Reconocimiento de Caras mediante Métodos de tipo Eigenspace. Anales del Instituto de Ingenieros de Chile. Vol. 113, No. 113, pp. 3-25

Posters

Escobar M.J., Masson G.S., Kornprobst P. and Vieville T. (2007). Spiking MT model: Dynamics and motion patterns. Poster presentation in ECVP 2007

Escobar M.J., Kornprobst P. and Vieville T. (2007). Spike to Spike model and Applications. Poster presentation in CNS 2007 (pdf)

Escobar M.J., Wohrer A., Kornprobst P. and Vieville T. (2006). Can we recognize motion from spike train analysis? Poster presentation in ECVP 2006