dc.creator | Leñero Bardallo, Juan Antonio | es |
dc.creator | Serrano Gotarredona, María Teresa | es |
dc.creator | Linares Barranco, Bernabé | es |
dc.date.accessioned | 2020-09-30T09:36:37Z | |
dc.date.available | 2020-09-30T09:36:37Z | |
dc.date.issued | 2009 | |
dc.identifier.citation | Leñero Bardallo, J.A., Serrano Gotarredona, M.T. y Linares Barranco, B. (2009). A Mismatch Calibrated Bipolar Spatial Contrast AER Retina with Adjustable Contrast Threshold. En ISCAS 2009: IEEE International Symposium on Circuits and Systems (1493-1496), Taipei, Taiwan: IEEE Computer Society. | |
dc.identifier.isbn | 978-1-4244-3827-3 | es |
dc.identifier.issn | 0271-4302 | es |
dc.identifier.uri | https://hdl.handle.net/11441/101603 | |
dc.description.abstract | Address Event Representation (AER) is an emergent
technology for assembling modular multi-blocks
bio-inspired sensory and processing systems. Visual sensors
(retinae) are among the first AER modules to be reported
since the introduction of the technology. Spatial contrast
AER retinae are of special interest since they provide
highly compressed data flow without reducing the relevant
information required for performing recognition.
Reported AER contrast retinae perform a contrast
computation based on the ratio between a pixel’s local light
intensity and a spatially weighted average of its
neighbourhood. This resulted in compact circuits, but with
the penalty of all pixels generating output signals even if
they sensed no contrast. In this paper we present a spatial
contrast retina with bipolar output: contrast is computed as
the relative difference between a pixel’s local light and its
weighted spatial average. As a result, contrast includes a
sign and the output will be zero if there is no contrast.
Furthermore, an adjustable thresholding mechanism has
been included, such that pixels remain silent until they
sense an absolute contrast above the adjustable threshold.
The pixel contrast computation circuit is based on
Boahen’s Biharmonic operator contrast circuit, which has
been improved to include mismatch calibration and
adaptive current based biasing. As a result, the contrast
computation circuit shows much less mismatch, is almost
insensitive to ambient light illumination, and biasing is
much less critical than in the original voltage biasing
scheme. A full AER retina version has been submitted for
fabrication. In the present paper we provide simulation
results. | es |
dc.description.sponsorship | European Union 216777 (NABAB) | es |
dc.description.sponsorship | Ministerio de Educación y Ciencia TEC2006-11730-C03-01 | es |
dc.description.sponsorship | Junta de Andalucía P06TIC01417 | es |
dc.format | application/pdf | es |
dc.format.extent | 4 | es |
dc.language.iso | eng | es |
dc.publisher | IEEE Computer Society | es |
dc.relation.ispartof | ISCAS 2009: IEEE International Symposium on Circuits and Systems (2009), p 1493-1496 | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.title | A Mismatch Calibrated Bipolar Spatial Contrast AER Retina with Adjustable Contrast Threshold | es |
dc.type | info:eu-repo/semantics/conferenceObject | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/submittedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Arquitectura y Tecnología de Computadores | es |
dc.relation.projectID | 216777 (NABAB) | es |
dc.relation.projectID | TEC2006-11730-C03-01 | es |
dc.relation.projectID | P06TIC01417 | es |
dc.relation.publisherversion | https://ieeexplore.ieee.org/document/5118050 | es |
dc.identifier.doi | 10.1109/ISCAS.2009.5118050 | es |
dc.publication.initialPage | 1493 | es |
dc.publication.endPage | 1496 | es |
dc.eventtitle | ISCAS 2009: IEEE International Symposium on Circuits and Systems | es |
dc.eventinstitution | Taipei, Taiwan | es |
dc.relation.publicationplace | New York, USA | es |
dc.contributor.funder | European Union (UE) | es |
dc.contributor.funder | Ministerio de Educación y Ciencia (MEC). España | es |
dc.contributor.funder | Junta de Andalucía | es |