Retinal Prosthesis Dissertation - Student Home Pages

A Retinomorphic Vision System
“Instead, the communications channel includes an arbiter to deal with contention and a
queue where unsuccessful contenders wait. This architecture was proposed by Sivilotti
and Mahowald.” [162]
On Algorithmic Rate-Coded AER Generation
“This paper addresses the problem of converting a sequence of frames into the spike
event-based representation known as the address-event-representation (AER)...AERbased
interchip communication was originally proposed by Mahowald and Sivilotti…A
growing community of researchers is using this scheme for bio inspired vision...AER
has been an important mainstream line at the annual National Science Foundation
(NSF) funded Telluride Neuromorphic Workshop series. Transforming the video stream
of a conventional frame-based representation (FBR) sequence...Such a transformation is
the purpose of the present paper….Events can be time shifted to a certain degree
because AER receiver reconstruct signals by integrating (averaging) over time…”
[59]
Optic Nerve Signals in a Neuromorphic Chip II:
Testing and Results
“Our retinomorphic chip produces spike trains for 3600 ganglion cells (GCs) and
consumes 62.7 Mw at 45 spikes/s/GC… by capturing the neural code of the mammalian
retina our chip can provide researchers with realistic retinal input with which they can
design and test subsequent neuromorphic circuits.” [231]
A Prototype Retinal Prosthesis for Visual
Stimulation
“Live webcam images are converted to an 8 x 8 mosaic of 256 greyscale shades.
Subsequently, electrical impulses are generated by the excitatory circuit in real-time to