Open AccessAddress event representation neuromorphics to epiretinal colour vision
Author(s) -
Jameson A.,
Chester E.G.,
Yakovlev A.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2012.2937
Subject(s) - video graphics array , earlobe , retinal prosthesis , neuromorphic engineering , computer science , computer vision , artificial intelligence , computer hardware , chip , retinal implant , field programmable gate array , optics , retina , physics , telecommunications , medicine , pathology , artificial neural network
Presented is a methodology of conversion of a conventional colour measure, e.g. 24‐bit colour, to a neuromorphic representation for use with epiretinal prostheses. The conversion implemented, for a 4 by 4 image, within a field programmable gate array outputs three groups of timing signals. These three groups correspond to red (R), green (G) and blue (B) colour channels. In future work the channels will input to a retinal implant stimulator, via a receiver chip housed over the earlobe of a prosthesis recipient, to form biphasic pulses to drive electrodes stimulating the axons of colour specific retinal ganglion cells. A test setup was used to encode the hue pulses back to intensity to display test images on a VGA monitor for validation.