DocumentCode :
981687
Title :
Second-order neural core for bioinspired focal-plane dynamic image processing in CMOS
Author :
Carmona-Galán, Ricardo ; Jiménez-Garrido, Francisco ; Domínguez-Mata, Carlos Manuel ; Domínguez-Castro, Rafael ; Meana, Servando Espejo ; Petras, Istvan ; Rodríguez-Vázquez, Ángel
Author_Institution :
Centro Nacional de Microelectron., Univ. de Sevilla, Seville, Spain
Volume :
51
Issue :
5
fYear :
2004
fDate :
5/1/2004 12:00:00 AM
Firstpage :
913
Lastpage :
925
Abstract :
Based on studies of the mammalian retina, a bioinspired model for mixed-signal array processing has been implemented on silicon. This model mimics the way in which images are processed at the front-end of natural visual pathways, by means of programmable complex spatio-temporal dynamic. When embedded into a focal-plane processing chip, such a model allows for online parallel filtering of the captured image; the outcome of such processing can be used to develop control feedback actions to adapt the response of photoreceptors to local image features. Beyond simple resistive grid filtering, it is possible to program other spatio-temporal processing operators into the model core, such as nonlinear and anisotropic diffusion, among others. This paper presents analog and mixed-signal very large-scale integration building blocks to implement this model, and illustrates their operation through experimental results taken from a prototype chip fabricated in a 0.5-μm CMOS technology.
Keywords :
CMOS integrated circuits; VLSI; filters; image processing; image sensors; nonlinear systems; parallel processing; silicon; CMOS technology; anisotropic diffusion; bioinspired focal-plane; bioinspired model; focal-plane processing chip; grid filtering; image processing; local image features; mammalian retina; mixed-signal array processing; neural core; nonlinear diffusion; nonlinear systems; online parallel filtering; parallel processing; photoreceptors; programmable complex spatio-temporal dynamic; silicon; spatio-temporal processing operators; very large-scale integration; visual pathways; Anisotropic magnetoresistance; Array signal processing; CMOS process; CMOS technology; Filtering; Image processing; Photoreceptors; Retina; Semiconductor device modeling; Silicon; Neural network hardware; nonlinear systems; parallel processing;
fLanguage :
English
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
Publisher :
ieee
ISSN :
1549-8328
Type :
jour
DOI :
10.1109/TCSI.2004.827641
Filename :
1296804
Link To Document :
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