Image processing and interface for retinal visual prostheses

Wentai Liu, Wolfgang Fink, Mark Tarbell, Mohanasankar Sivaprakasam

Research output: Contribution to journalConference articlepeer-review

22 Scopus citations


Controlled electrical stimulation of the retina can result in visual percepts in blind patients. In contrast to the over 100,000,000 photoreceptors in a healthy retina, even hundreds of pixels/electrodes of a retinal implant may restore low-resolution vision for unaided mobility and large print reading. We describe the real-time application of image processing techniques such as contrast and brightness enhancement, grayscale histogram equalization, edge detection, and grayscale reduction, to enhance visual perception provided by a retinal implant. We discuss schemes for reducing the amount of data transmitted wirelessly to the implant, as well as the interface between the external imaging unit and retinal implant.

Original languageEnglish (US)
Article number1465240
Pages (from-to)2927-2930
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
StatePublished - 2005
EventIEEE International Symposium on Circuits and Systems 2005, ISCAS 2005 - Kobe, Japan
Duration: May 23 2005May 26 2005

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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