Image processing and interface for retinal visual prostheses
Wentai Liu
Fink, W.
Tarbell, M.
Sivaprakasam, M.
Dept. of Electr. Eng., California Univ., Santa Cruz, CA, USA;
This paper appears in: Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Publication Date: 23-26 May 2005
On page(s): 2927- 2930 Vol. 3
ISBN: 0-7803-8834-8
INSPEC Accession Number: 8615063
Digital Object Identifier: 10.1109/ISCAS.2005.1465240
Current Version Published: 2005-07-25
Abstract
Controlled electrical stimulation of the retina can result in visual perception 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 the 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.
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